[binutils-gdb] Arm: Fix performance issue with thumb-2 tailcalls

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[binutils-gdb] Arm: Fix performance issue with thumb-2 tailcalls

gdb-buildbot
*** TEST RESULTS FOR COMMIT b4e87f2c1eee99dee805e3828514f8afa162f9ba ***

commit b4e87f2c1eee99dee805e3828514f8afa162f9ba
Author:     Tamar Christina <[hidden email]>
AuthorDate: Tue Aug 20 16:34:26 2019 +0100
Commit:     Tamar Christina <[hidden email]>
CommitDate: Tue Aug 20 16:35:28 2019 +0100

    Arm: Fix performance issue with thumb-2 tailcalls
   
    We currently use a padding NOP after a Thumb to Arm interworking veneer (BX pc).
    The NOP is never executed but may result in a performance penalty on some cores.
   
    For this reason this patch changes the NOPs after Thumb to Arm veneers into B .-2
    and adds a note to this in the source code for future reference.
   
    bfd/ChangeLog:
   
            * elf32-arm.c (elf32_thumb2_plt_entry, elf32_arm_plt_thumb_stub,
            elf32_arm_stub_long_branch_v4t_thumb_thumb,
            elf32_arm_stub_long_branch_v4t_thumb_arm,
            elf32_arm_stub_short_branch_v4t_thumb_arm,
            elf32_arm_stub_long_branch_v4t_thumb_arm_pic,
            elf32_arm_stub_long_branch_v4t_thumb_thumb_pic,
            elf32_arm_stub_long_branch_v4t_thumb_tls_pic): Change nop to branch to
            previous instruction.
   
    ld/ChangeLog:
   
            * testsuite/ld-arm/cortex-a8-fix-b-plt.d: Update Testcase.
            * testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d: Likewise.
            * testsuite/ld-arm/cortex-a8-fix-bcc-plt.d: Likewise.
            * testsuite/ld-arm/farcall-cond-thumb-arm.d: Likewise.
            * testsuite/ld-arm/farcall-mixed-app.d: Likewise.
            * testsuite/ld-arm/farcall-mixed-app2.d: Likewise.
            * testsuite/ld-arm/farcall-mixed-lib-v4t.d: Likewise.
            * testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d: Likewise.
            * testsuite/ld-arm/farcall-thumb-arm-short.d: Likewise.
            * testsuite/ld-arm/farcall-thumb-arm.d: Likewise.
            * testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d: Likewise.
            * testsuite/ld-arm/farcall-thumb-thumb.d: Likewise.
            * testsuite/ld-arm/fix-arm1176-on.d: Likewise.
            * testsuite/ld-arm/ifunc-10.dd: Likewise.
            * testsuite/ld-arm/ifunc-2.dd: Likewise.
            * testsuite/ld-arm/ifunc-4.dd: Likewise.
            * testsuite/ld-arm/ifunc-6.dd: Likewise.
            * testsuite/ld-arm/ifunc-8.dd: Likewise.
            * testsuite/ld-arm/jump-reloc-veneers-long.d: Likewise.
            * testsuite/ld-arm/mixed-app.d: Likewise.
            * testsuite/ld-arm/thumb2-b-interwork.d: Likewise.
            * testsuite/ld-arm/tls-longplt.d: Likewise.
            * testsuite/ld-arm/tls-thumb1.d: Likewise.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index bfaec7b5d8..e566656e61 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,14 @@
+2019-08-20  Tamar Christina  <[hidden email]>
+
+ * elf32-arm.c (elf32_thumb2_plt_entry, elf32_arm_plt_thumb_stub,
+ elf32_arm_stub_long_branch_v4t_thumb_thumb,
+ elf32_arm_stub_long_branch_v4t_thumb_arm,
+ elf32_arm_stub_short_branch_v4t_thumb_arm,
+ elf32_arm_stub_long_branch_v4t_thumb_arm_pic,
+ elf32_arm_stub_long_branch_v4t_thumb_thumb_pic,
+ elf32_arm_stub_long_branch_v4t_thumb_tls_pic): Change nop to branch to
+ previous instruction.
+
 2019-08-19  Tom Tromey  <[hidden email]>
 
  * dwarf2.c (_bfd_dwarf2_find_symbol_bias): Create hash table
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index f1895df278..d1548d6db3 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -2329,6 +2329,11 @@ static const unsigned long dl_tlsdesc_lazy_trampoline [] =
   0x00000018, /* 4:   .word  _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
 };
 
+/* NOTE: [Thumb nop sequence]
+   When adding code that transitions from Thumb to Arm the instruction that
+   should be used for the alignment padding should be 0xe7fd (b .-2) instead of
+   a nop for performance reasons.  */
+
 /* ARM FDPIC PLT entry.  */
 /* The last 5 words contain PLT lazy fragment code and data.  */
 static const bfd_vma elf32_arm_fdpic_plt_entry [] =
@@ -2446,8 +2451,8 @@ static const bfd_vma elf32_thumb2_plt_entry [] =
   0x0c00f240, /* movw   ip, #0xNNNN  */
   0x0c00f2c0, /* movt   ip, #0xNNNN  */
   0xf8dc44fc, /* add   ip, pc  */
-  0xbf00f000 /* ldr.w   pc, [ip]  */
- /* nop  */
+  0xe7fdf000 /* ldr.w   pc, [ip]  */
+ /* b      .-2  */
 };
 
 /* The format of the first entry in the procedure linkage table
@@ -2487,7 +2492,7 @@ static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
 static const bfd_vma elf32_arm_plt_thumb_stub [] =
 {
   0x4778, /* bx pc */
-  0x46c0 /* nop   */
+  0xe7fd /* b .-2 */
 };
 
 /* The entries in a PLT when using a DLL-based target with multiple
@@ -2574,6 +2579,8 @@ typedef struct
   int       reloc_addend;
 }  insn_sequence;
 
+/* See note [Thumb nop sequence] when adding a veneer.  */
+
 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
    to reach the stub if necessary.  */
 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
@@ -2624,7 +2631,7 @@ static const insn_sequence elf32_arm_stub_long_branch_thumb2_only_pure[] =
 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_INSN (0xe59fc000),     /* ldr  ip, [pc, #0] */
   ARM_INSN (0xe12fff1c),     /* bx   ip */
   DATA_WORD (0, R_ARM_ABS32, 0),     /* dcd  R_ARM_ABS32(X) */
@@ -2635,7 +2642,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop   */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_INSN (0xe51ff004),     /* ldr   pc, [pc, #-4] */
   DATA_WORD (0, R_ARM_ABS32, 0),     /* dcd   R_ARM_ABS32(X) */
 };
@@ -2645,7 +2652,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop   */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_REL_INSN (0xea000000, -8),     /* b    (X-8) */
 };
 
@@ -2683,7 +2690,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop  */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_INSN (0xe59fc000),     /* ldr  ip, [pc, #0] */
   ARM_INSN (0xe08cf00f),     /* add  pc, ip, pc */
   DATA_WORD (0, R_ARM_REL32, -4),     /* dcd  R_ARM_REL32(X) */
@@ -2707,7 +2714,7 @@ static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_INSN (0xe59fc004),     /* ldr  ip, [pc, #4] */
   ARM_INSN (0xe08fc00c),     /* add   ip, pc, ip */
   ARM_INSN (0xe12fff1c),     /* bx   ip */
@@ -2728,7 +2735,7 @@ static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
 {
   THUMB16_INSN (0x4778),     /* bx   pc */
-  THUMB16_INSN (0x46c0),     /* nop */
+  THUMB16_INSN (0xe7fd),     /* b   .-2 */
   ARM_INSN (0xe59f1000),     /* ldr  r1, [pc, #0] */
   ARM_INSN (0xe081f00f),     /* add  pc, r1, pc */
   DATA_WORD (0, R_ARM_REL32, -4),    /* dcd  R_ARM_REL32(X) */
diff --git a/ld/ChangeLog b/ld/ChangeLog
index 4837aac220..4f71ce81bd 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,29 @@
+2019-08-20  Tamar Christina  <[hidden email]>
+
+ * testsuite/ld-arm/cortex-a8-fix-b-plt.d: Update Testcase.
+ * testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d: Likewise.
+ * testsuite/ld-arm/cortex-a8-fix-bcc-plt.d: Likewise.
+ * testsuite/ld-arm/farcall-cond-thumb-arm.d: Likewise.
+ * testsuite/ld-arm/farcall-mixed-app.d: Likewise.
+ * testsuite/ld-arm/farcall-mixed-app2.d: Likewise.
+ * testsuite/ld-arm/farcall-mixed-lib-v4t.d: Likewise.
+ * testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d: Likewise.
+ * testsuite/ld-arm/farcall-thumb-arm-short.d: Likewise.
+ * testsuite/ld-arm/farcall-thumb-arm.d: Likewise.
+ * testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d: Likewise.
+ * testsuite/ld-arm/farcall-thumb-thumb.d: Likewise.
+ * testsuite/ld-arm/fix-arm1176-on.d: Likewise.
+ * testsuite/ld-arm/ifunc-10.dd: Likewise.
+ * testsuite/ld-arm/ifunc-2.dd: Likewise.
+ * testsuite/ld-arm/ifunc-4.dd: Likewise.
+ * testsuite/ld-arm/ifunc-6.dd: Likewise.
+ * testsuite/ld-arm/ifunc-8.dd: Likewise.
+ * testsuite/ld-arm/jump-reloc-veneers-long.d: Likewise.
+ * testsuite/ld-arm/mixed-app.d: Likewise.
+ * testsuite/ld-arm/thumb2-b-interwork.d: Likewise.
+ * testsuite/ld-arm/tls-longplt.d: Likewise.
+ * testsuite/ld-arm/tls-thumb1.d: Likewise.
+
 2019-08-16  H.J. Lu  <[hidden email]>
 
  PR ld/24905
diff --git a/ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d b/ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d
index bbf68398d6..54f56e4ccb 100644
--- a/ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d
+++ b/ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d
@@ -12,7 +12,7 @@ Disassembly of section \.plt:
     8010: 00000ffc \.word 0x00000ffc
 00008014 <bar@plt>:
     8014: 4778       bx pc
-    8016: 46c0       nop ; \(mov r8, r8\)
+    8016: e7fd       b.n .+ <.+>
     8018: e28fc600 add ip, pc, #0, 12
     801c: e28cca00 add ip, ip, #0, 20
     8020: e5bcfff8 ldr pc, \[ip, #4088\]! ; 0xff8
diff --git a/ld/testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d b/ld/testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d
index 3e52a49556..afa1e4897a 100644
--- a/ld/testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d
+++ b/ld/testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d
@@ -79,5 +79,5 @@ Disassembly of section \.text:
 
 00009010 <__targetfn_from_thumb>:
     9010: 4778       bx pc
-    9012: 46c0       nop ; \(mov r8, r8\)
+    9012: e7fd       b.n .+ <.+>
     9014: eaffffb9 b 8f00 <targetfn>
diff --git a/ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d b/ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d
index 079c928ea0..425c10207f 100644
--- a/ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d
+++ b/ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d
@@ -12,7 +12,7 @@ Disassembly of section \.plt:
     8010: 00001004 \.word 0x00001004
 00008014 <bar@plt>:
     8014: 4778       bx pc
-    8016: 46c0       nop ; \(mov r8, r8\)
+    8016: e7fd       b.n .+ <.+>
     8018: e28fc600 add ip, pc, #0, 12
     801c: e28cca01 add ip, ip, #4096 ; 0x1000
     8020: e5bcf000 ldr pc, \[ip, #0\]!
diff --git a/ld/testsuite/ld-arm/farcall-cond-thumb-arm.d b/ld/testsuite/ld-arm/farcall-cond-thumb-arm.d
index 0b0172b75e..c0d96523f4 100644
--- a/ld/testsuite/ld-arm/farcall-cond-thumb-arm.d
+++ b/ld/testsuite/ld-arm/farcall-cond-thumb-arm.d
@@ -9,7 +9,7 @@ Disassembly of section .text:
 
 00058008 <__bar_from_thumb>:
    58008: 4778       bx pc
-   5800a: 46c0       nop ; \(mov r8, r8\)
+   5800a: e7fd       b.n .+ <.+>
    5800c: ea02fffb b 118000 <bar>
 
 Disassembly of section .foo:
diff --git a/ld/testsuite/ld-arm/farcall-mixed-app.d b/ld/testsuite/ld-arm/farcall-mixed-app.d
index f3be54f134..0160f46d3a 100644
--- a/ld/testsuite/ld-arm/farcall-mixed-app.d
+++ b/ld/testsuite/ld-arm/farcall-mixed-app.d
@@ -14,7 +14,7 @@ Disassembly of section .plt:
  .*: .*
 .* <lib_func2@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]!.*
@@ -82,7 +82,7 @@ Disassembly of section .far_thumb:
 
 .* <__lib_func2_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e51ff004 ldr pc, \[pc, #-4\] ; 2200018 <__lib_func2_from_thumb\+0x8>
  .*: 000081e0 .word 0x000081e0
  .*: 00000000 .word 0x00000000
diff --git a/ld/testsuite/ld-arm/farcall-mixed-app2.d b/ld/testsuite/ld-arm/farcall-mixed-app2.d
index 535710d0bd..0c70148515 100644
--- a/ld/testsuite/ld-arm/farcall-mixed-app2.d
+++ b/ld/testsuite/ld-arm/farcall-mixed-app2.d
@@ -14,7 +14,7 @@ Disassembly of section .plt:
  .*: .*
 .* <lib_func2@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]!.*
@@ -56,7 +56,7 @@ Disassembly of section .mid_thumb:
 
 .* <__lib_func2_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e51ff004 ldr pc, \[pc, #-4\] ; 10081e8 <__lib_func2_from_thumb\+0x8>
  .*: 000081e0 .word 0x000081e0
  .*: 00000000 .word 0x00000000
diff --git a/ld/testsuite/ld-arm/farcall-mixed-lib-v4t.d b/ld/testsuite/ld-arm/farcall-mixed-lib-v4t.d
index 3d12e0ae64..1b15879b25 100644
--- a/ld/testsuite/ld-arm/farcall-mixed-lib-v4t.d
+++ b/ld/testsuite/ld-arm/farcall-mixed-lib-v4t.d
@@ -13,25 +13,25 @@ Disassembly of section .plt:
  .*: .* .word .*
 .* <app_func@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]! ; .*
 .* <app_func_weak@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
 .* <lib_func3@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
 .* <lib_func4@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
@@ -59,28 +59,28 @@ Disassembly of section .text:
 
 .* <__app_func_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: feffff.. .word 0xfeffff..
 
 .* <__lib_func4_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__lib_func4_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: feffff.. .word 0xfeffff..
 
 .* <__app_func_weak_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_weak_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: feffff.. .word 0xfeffff..
 
 .* <__lib_func3_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__lib_func3_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: feffff.. .word 0xfeffff..
@@ -94,14 +94,14 @@ Disassembly of section .text:
 
 .* <__app_func_weak_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_weak_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: fdffff34 .word 0xfdffff34
 
 .* <__app_func_from_thumb>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_from_thumb\+0xc>
  .*: e08cf00f add pc, ip, pc
  .*: fdffff14 .word 0xfdffff14
diff --git a/ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d b/ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d
index aff4df79bc..f96d467cea 100644
--- a/ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d
+++ b/ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d
@@ -9,7 +9,7 @@ Disassembly of section .text:
 
 01f01018 <__bar_from_thumb>:
  1f01018: 4778       bx pc
- 1f0101a: 46c0       nop ; \(mov r8, r8\)
+ 1f0101a: e7fd       b.n .+ <.+>
  1f0101c: e59fc000 ldr ip, \[pc\] ; 1f01024 <__bar_from_thumb\+0xc>
  1f01020: e08cf00f add pc, ip, pc
  1f01024: 000fffec .word 0x000fffec
diff --git a/ld/testsuite/ld-arm/farcall-thumb-arm-short.d b/ld/testsuite/ld-arm/farcall-thumb-arm-short.d
index 4e19039433..b74f385c96 100644
--- a/ld/testsuite/ld-arm/farcall-thumb-arm-short.d
+++ b/ld/testsuite/ld-arm/farcall-thumb-arm-short.d
@@ -9,7 +9,7 @@ Disassembly of section .text:
 
 00001008 <__bar_from_thumb>:
     1008: 4778       bx pc
-    100a: 46c0       nop ; \(mov r8, r8\)
+    100a: e7fd       b.n .+ <.+>
     100c: ea000400 b 2014 <bar>
 Disassembly of section .foo:
 
diff --git a/ld/testsuite/ld-arm/farcall-thumb-arm.d b/ld/testsuite/ld-arm/farcall-thumb-arm.d
index 5dc377a0b0..d62649d838 100644
--- a/ld/testsuite/ld-arm/farcall-thumb-arm.d
+++ b/ld/testsuite/ld-arm/farcall-thumb-arm.d
@@ -9,13 +9,13 @@ Disassembly of section .text:
 
 01f01018 <__bar_from_thumb>:
  1f01018: 4778       bx pc
- 1f0101a: 46c0       nop ; \(mov r8, r8\)
+ 1f0101a: e7fd       b.n .+ <.+>
  1f0101c: e51ff004 ldr pc, \[pc, #-4\] ; 1f01020 <__bar_from_thumb\+0x8>
  1f01020: 02001014 .word 0x02001014
 
 01f01024 <__bar_from_thumb>:
  1f01024: 4778       bx pc
- 1f01026: 46c0       nop ; \(mov r8, r8\)
+ 1f01026: e7fd       b.n .+ <.+>
  1f01028: ea03fff9 b 2001014 <bar>
  1f0102c: 00000000 andeq r0, r0, r0
 
diff --git a/ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d b/ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d
index 8b14599a53..0b7184bba2 100644
--- a/ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d
+++ b/ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d
@@ -9,7 +9,7 @@ Disassembly of section .text:
 
 00001008 <__bar_veneer>:
     1008: 4778       bx pc
-    100a: 46c0       nop ; \(mov r8, r8\)
+    100a: e7fd       b.n .+ <.+>
     100c: e59fc004 ldr ip, \[pc, #4\] ; 1018 <__bar_veneer\+0x10>
     1010: e08fc00c add ip, pc, ip
     1014: e12fff1c bx ip
diff --git a/ld/testsuite/ld-arm/farcall-thumb-thumb.d b/ld/testsuite/ld-arm/farcall-thumb-thumb.d
index 4f4c2c9bd6..0d9a898eff 100644
--- a/ld/testsuite/ld-arm/farcall-thumb-thumb.d
+++ b/ld/testsuite/ld-arm/farcall-thumb-thumb.d
@@ -9,7 +9,7 @@ Disassembly of section .text:
 
 00001008 <__bar_veneer>:
     1008: 4778       bx pc
-    100a: 46c0       nop ; \(mov r8, r8\)
+    100a: e7fd       b.n .+ <.+>
     100c: e59fc000 ldr ip, \[pc\] ; 1014 <__bar_veneer\+0xc>
     1010: e12fff1c bx ip
     1014: 02001015 .word 0x02001015
diff --git a/ld/testsuite/ld-arm/fix-arm1176-on.d b/ld/testsuite/ld-arm/fix-arm1176-on.d
index 834618e89c..46510dc73d 100644
--- a/ld/testsuite/ld-arm/fix-arm1176-on.d
+++ b/ld/testsuite/ld-arm/fix-arm1176-on.d
@@ -9,7 +9,7 @@ Disassembly of section .foo:
 
 [0-9a-f]+ <__func_to_branch_to_veneer>:
  +[0-9a-f]+: 4778       bx pc
- +[0-9a-f]+: 46c0       nop ; \(mov r8, r8\)
+ +[0-9a-f]+: e7fd       b.n .+ <.+>
  +[0-9a-f]+: e51ff004 ldr pc, \[pc, #-4\] ; 2001020 <__func_to_branch_to_veneer\+0x8>
  +[0-9a-f]+: ........ .word 0x........
  +[0-9a-f]+: 00000000 .word 0x00000000
diff --git a/ld/testsuite/ld-arm/ifunc-10.dd b/ld/testsuite/ld-arm/ifunc-10.dd
index 05e4be5b59..6b9771f6c0 100644
--- a/ld/testsuite/ld-arm/ifunc-10.dd
+++ b/ld/testsuite/ld-arm/ifunc-10.dd
@@ -18,7 +18,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009014 <atf2@plt>:
     9014: 4778       bx pc
-    9016: 46c0       nop ; \(mov r8, r8\)
+    9016: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf2's .plt entry
 #------------------------------------------------------------------------------
@@ -37,7 +37,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009030 <ttf2@plt>:
     9030: 4778       bx pc
-    9032: 46c0       nop ; \(mov r8, r8\)
+    9032: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf2's .plt entry
 #------------------------------------------------------------------------------
@@ -49,7 +49,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009040 <tbf2@plt>:
     9040: 4778       bx pc
-    9042: 46c0       nop ; \(mov r8, r8\)
+    9042: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf2's .plt entry
 #------------------------------------------------------------------------------
@@ -75,7 +75,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009068 <abf4@plt>:
     9068: 4778       bx pc
-    906a: 46c0       nop ; \(mov r8, r8\)
+    906a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf4's .plt entry
 #------------------------------------------------------------------------------
@@ -87,7 +87,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009078 <tbf4@plt>:
     9078: 4778       bx pc
-    907a: 46c0       nop ; \(mov r8, r8\)
+    907a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf4's .plt entry
 #------------------------------------------------------------------------------
@@ -99,7 +99,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009088 <ttf4@plt>:
     9088: 4778       bx pc
-    908a: 46c0       nop ; \(mov r8, r8\)
+    908a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf4's .plt entry
 #------------------------------------------------------------------------------
@@ -111,7 +111,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009098 <atf4@plt>:
     9098: 4778       bx pc
-    909a: 46c0       nop ; \(mov r8, r8\)
+    909a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf4's .plt entry
 #------------------------------------------------------------------------------
@@ -130,7 +130,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 000090b4 <abf2@plt>:
     90b4: 4778       bx pc
-    90b6: 46c0       nop ; \(mov r8, r8\)
+    90b6: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf2's .plt entry
 #------------------------------------------------------------------------------
@@ -151,7 +151,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf1's .iplt entry
 #------------------------------------------------------------------------------
     90d0: 4778       bx pc
-    90d2: 46c0       nop ; \(mov r8, r8\)
+    90d2: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -162,7 +162,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf1's .iplt entry
 #------------------------------------------------------------------------------
     90e0: 4778       bx pc
-    90e2: 46c0       nop ; \(mov r8, r8\)
+    90e2: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -179,7 +179,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf1's .iplt entry
 #------------------------------------------------------------------------------
     90fc: 4778       bx pc
-    90fe: 46c0       nop ; \(mov r8, r8\)
+    90fe: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -190,7 +190,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf1's .iplt entry
 #------------------------------------------------------------------------------
     910c: 4778       bx pc
-    910e: 46c0       nop ; \(mov r8, r8\)
+    910e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -201,7 +201,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf3
 #------------------------------------------------------------------------------
     911c: 4778       bx pc
-    911e: 46c0       nop ; \(mov r8, r8\)
+    911e: e7fd       b.n .+ <.+>
 
 00009120 <atf3>:
     9120: e28fc600 add ip, pc, #0, 12
@@ -211,7 +211,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf3
 #------------------------------------------------------------------------------
     912c: 4778       bx pc
-    912e: 46c0       nop ; \(mov r8, r8\)
+    912e: e7fd       b.n .+ <.+>
 
 00009130 <abf3>:
     9130: e28fc600 add ip, pc, #0, 12
@@ -221,7 +221,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf3
 #------------------------------------------------------------------------------
     913c: 4778       bx pc
-    913e: 46c0       nop ; \(mov r8, r8\)
+    913e: e7fd       b.n .+ <.+>
 
 00009140 <ttf3>:
     9140: e28fc600 add ip, pc, #0, 12
@@ -231,7 +231,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf3
 #------------------------------------------------------------------------------
     914c: 4778       bx pc
-    914e: 46c0       nop ; \(mov r8, r8\)
+    914e: e7fd       b.n .+ <.+>
 
 00009150 <tbf3>:
     9150: e28fc600 add ip, pc, #0, 12
diff --git a/ld/testsuite/ld-arm/ifunc-2.dd b/ld/testsuite/ld-arm/ifunc-2.dd
index 91eab540d2..a60ef2b027 100644
--- a/ld/testsuite/ld-arm/ifunc-2.dd
+++ b/ld/testsuite/ld-arm/ifunc-2.dd
@@ -21,7 +21,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f3's .iplt entry
 #------------------------------------------------------------------------------
     9018: 4778       bx pc
-    901a: 46c0       nop ; \(mov r8, r8\)
+    901a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ f3's .iplt entry
 #------------------------------------------------------------------------------
@@ -32,7 +32,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f4's .iplt entry
 #------------------------------------------------------------------------------
     9028: 4778       bx pc
-    902a: 46c0       nop ; \(mov r8, r8\)
+    902a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ f4's .iplt entry
 #------------------------------------------------------------------------------
@@ -43,7 +43,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f7
 #------------------------------------------------------------------------------
     9038: 4778       bx pc
-    903a: 46c0       nop ; \(mov r8, r8\)
+    903a: e7fd       b.n .+ <.+>
 
 0000903c <f7>:
     903c: e28fc600 add ip, pc, #0, 12
@@ -58,7 +58,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f8
 #------------------------------------------------------------------------------
     9054: 4778       bx pc
-    9056: 46c0       nop ; \(mov r8, r8\)
+    9056: e7fd       b.n .+ <.+>
 
 00009058 <f8>:
     9058: e28fc600 add ip, pc, #0, 12
diff --git a/ld/testsuite/ld-arm/ifunc-4.dd b/ld/testsuite/ld-arm/ifunc-4.dd
index 647a340855..89fc34b85d 100644
--- a/ld/testsuite/ld-arm/ifunc-4.dd
+++ b/ld/testsuite/ld-arm/ifunc-4.dd
@@ -18,7 +18,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009014 <atf2@plt>:
     9014: 4778       bx pc
-    9016: 46c0       nop ; \(mov r8, r8\)
+    9016: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf2's .plt entry
 #------------------------------------------------------------------------------
@@ -30,7 +30,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009024 <ttf2@plt>:
     9024: 4778       bx pc
-    9026: 46c0       nop ; \(mov r8, r8\)
+    9026: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf2's .plt entry
 #------------------------------------------------------------------------------
@@ -42,7 +42,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 00009034 <tbf2@plt>:
     9034: 4778       bx pc
-    9036: 46c0       nop ; \(mov r8, r8\)
+    9036: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf2's .plt entry
 #------------------------------------------------------------------------------
@@ -68,7 +68,7 @@ Disassembly of section \.plt:
 #------------------------------------------------------------------------------
 0000905c <abf2@plt>:
     905c: 4778       bx pc
-    905e: 46c0       nop ; \(mov r8, r8\)
+    905e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf2's .plt entry
 #------------------------------------------------------------------------------
@@ -89,7 +89,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf1's .iplt entry
 #------------------------------------------------------------------------------
     9078: 4778       bx pc
-    907a: 46c0       nop ; \(mov r8, r8\)
+    907a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -100,7 +100,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf1's .iplt entry
 #------------------------------------------------------------------------------
     9088: 4778       bx pc
-    908a: 46c0       nop ; \(mov r8, r8\)
+    908a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -117,7 +117,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf1's .iplt entry
 #------------------------------------------------------------------------------
     90a4: 4778       bx pc
-    90a6: 46c0       nop ; \(mov r8, r8\)
+    90a6: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -128,7 +128,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf1's .iplt entry
 #------------------------------------------------------------------------------
     90b4: 4778       bx pc
-    90b6: 46c0       nop ; \(mov r8, r8\)
+    90b6: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -145,7 +145,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf3's .iplt entry
 #------------------------------------------------------------------------------
     90d0: 4778       bx pc
-    90d2: 46c0       nop ; \(mov r8, r8\)
+    90d2: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -156,7 +156,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf3's .iplt entry
 #------------------------------------------------------------------------------
     90e0: 4778       bx pc
-    90e2: 46c0       nop ; \(mov r8, r8\)
+    90e2: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -167,7 +167,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf3's .iplt entry
 #------------------------------------------------------------------------------
     90f0: 4778       bx pc
-    90f2: 46c0       nop ; \(mov r8, r8\)
+    90f2: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -178,7 +178,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf3's .iplt entry
 #------------------------------------------------------------------------------
     9100: 4778       bx pc
-    9102: 46c0       nop ; \(mov r8, r8\)
+    9102: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -195,7 +195,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf4's .iplt entry
 #------------------------------------------------------------------------------
     911c: 4778       bx pc
-    911e: 46c0       nop ; \(mov r8, r8\)
+    911e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf4's .iplt entry
 #------------------------------------------------------------------------------
@@ -206,7 +206,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf4's .iplt entry
 #------------------------------------------------------------------------------
     912c: 4778       bx pc
-    912e: 46c0       nop ; \(mov r8, r8\)
+    912e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf4's .iplt entry
 #------------------------------------------------------------------------------
@@ -217,7 +217,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf4's .iplt entry
 #------------------------------------------------------------------------------
     913c: 4778       bx pc
-    913e: 46c0       nop ; \(mov r8, r8\)
+    913e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf4's .iplt entry
 #------------------------------------------------------------------------------
@@ -234,7 +234,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf4's .iplt entry
 #------------------------------------------------------------------------------
     9158: 4778       bx pc
-    915a: 46c0       nop ; \(mov r8, r8\)
+    915a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf4's .iplt entry
 #------------------------------------------------------------------------------
diff --git a/ld/testsuite/ld-arm/ifunc-6.dd b/ld/testsuite/ld-arm/ifunc-6.dd
index 3c9cbd5351..c060cb2051 100644
--- a/ld/testsuite/ld-arm/ifunc-6.dd
+++ b/ld/testsuite/ld-arm/ifunc-6.dd
@@ -9,7 +9,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f3's .iplt entry
 #------------------------------------------------------------------------------
     9000: 4778       bx pc
-    9002: 46c0       nop ; \(mov r8, r8\)
+    9002: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ f3's .iplt entry
 #------------------------------------------------------------------------------
@@ -26,7 +26,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to f4's .iplt entry
 #------------------------------------------------------------------------------
     901c: 4778       bx pc
-    901e: 46c0       nop ; \(mov r8, r8\)
+    901e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ f4's .iplt entry
 #------------------------------------------------------------------------------
diff --git a/ld/testsuite/ld-arm/ifunc-8.dd b/ld/testsuite/ld-arm/ifunc-8.dd
index 50a9177092..8216eb148d 100644
--- a/ld/testsuite/ld-arm/ifunc-8.dd
+++ b/ld/testsuite/ld-arm/ifunc-8.dd
@@ -15,7 +15,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf1's .iplt entry
 #------------------------------------------------------------------------------
     900c: 4778       bx pc
-    900e: 46c0       nop ; \(mov r8, r8\)
+    900e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -26,7 +26,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf1's .iplt entry
 #------------------------------------------------------------------------------
     901c: 4778       bx pc
-    901e: 46c0       nop ; \(mov r8, r8\)
+    901e: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -43,7 +43,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf1's .iplt entry
 #------------------------------------------------------------------------------
     9038: 4778       bx pc
-    903a: 46c0       nop ; \(mov r8, r8\)
+    903a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -54,7 +54,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf1's .iplt entry
 #------------------------------------------------------------------------------
     9048: 4778       bx pc
-    904a: 46c0       nop ; \(mov r8, r8\)
+    904a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf1's .iplt entry
 #------------------------------------------------------------------------------
@@ -65,7 +65,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to atf3's .iplt entry
 #------------------------------------------------------------------------------
     9058: 4778       bx pc
-    905a: 46c0       nop ; \(mov r8, r8\)
+    905a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ atf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -76,7 +76,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to abf3's .iplt entry
 #------------------------------------------------------------------------------
     9068: 4778       bx pc
-    906a: 46c0       nop ; \(mov r8, r8\)
+    906a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ abf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -87,7 +87,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to ttf3's .iplt entry
 #------------------------------------------------------------------------------
     9078: 4778       bx pc
-    907a: 46c0       nop ; \(mov r8, r8\)
+    907a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ ttf3's .iplt entry
 #------------------------------------------------------------------------------
@@ -98,7 +98,7 @@ Disassembly of section \.iplt:
 #------ thumb entry to tbf3's .iplt entry
 #------------------------------------------------------------------------------
     9088: 4778       bx pc
-    908a: 46c0       nop ; \(mov r8, r8\)
+    908a: e7fd       b.n .+ <.+>
 #------------------------------------------------------------------------------
 #------ tbf3's .iplt entry
 #------------------------------------------------------------------------------
diff --git a/ld/testsuite/ld-arm/jump-reloc-veneers-long.d b/ld/testsuite/ld-arm/jump-reloc-veneers-long.d
index ae176bed8a..1edb1b3772 100644
--- a/ld/testsuite/ld-arm/jump-reloc-veneers-long.d
+++ b/ld/testsuite/ld-arm/jump-reloc-veneers-long.d
@@ -16,7 +16,7 @@ Disassembly of section .text:
 
 000080.. <[^>]*>:
     80..: 4778       bx pc
-    80..: 46c0       nop ; \(mov r8, r8\)
+    80..: e7fd       b.n .+ <.+>
     80..: e59fc000 ldr ip, \[pc\] ; 80.. <__dest_veneer\+0xc>
     80..: e12fff1c bx ip
     80..: 09000001 .word 0x09000001
diff --git a/ld/testsuite/ld-arm/mixed-app.d b/ld/testsuite/ld-arm/mixed-app.d
index 4bcbdad8de..99c6e5dcf6 100644
--- a/ld/testsuite/ld-arm/mixed-app.d
+++ b/ld/testsuite/ld-arm/mixed-app.d
@@ -14,7 +14,7 @@ Disassembly of section .plt:
  .*: .*
 .* <lib_func2@plt>:
  .*: 4778       bx pc
- .*: 46c0       nop ; \(mov r8, r8\)
+ .*: e7fd       b.n .+ <.+>
  .*: e28fc6.* add ip, pc, #.*
  .*: e28cca.* add ip, ip, #.* ; 0x.*
  .*: e5bcf.* ldr pc, \[ip, #.*\]!.*
diff --git a/ld/testsuite/ld-arm/thumb2-b-interwork.d b/ld/testsuite/ld-arm/thumb2-b-interwork.d
index 67cb8638ec..e01ef50541 100644
--- a/ld/testsuite/ld-arm/thumb2-b-interwork.d
+++ b/ld/testsuite/ld-arm/thumb2-b-interwork.d
@@ -11,6 +11,6 @@ Disassembly of section .text:
 
 [0-9a-f]+ <__bar_from_thumb>:
  +[0-9a-f]+: 4778       bx pc
- +[0-9a-f]+: 46c0       nop ; \(mov r8, r8\)
+ +[0-9a-f]+: e7fd       b.n .+ <.+>
  +[0-9a-f]+: eafffffc b [0-9a-f]+ <bar>
 
diff --git a/ld/testsuite/ld-arm/tls-longplt.d b/ld/testsuite/ld-arm/tls-longplt.d
index 066467228b..c7fad34025 100644
--- a/ld/testsuite/ld-arm/tls-longplt.d
+++ b/ld/testsuite/ld-arm/tls-longplt.d
@@ -58,7 +58,7 @@ Disassembly of section .foo:
 
 04001038 <__unnamed_veneer>:
  4001038: 4778       bx pc
- 400103a: 46c0       nop ; .*
+ 400103a: e7fd       b.n .+ <.+>
  400103c: e51ff004 ldr pc, \[pc, #-4\] ; .*
  4001040: 000081b0 .word 0x000081b0
  4001044: 00000000 .word 0x00000000
diff --git a/ld/testsuite/ld-arm/tls-thumb1.d b/ld/testsuite/ld-arm/tls-thumb1.d
index 3b39f65604..41d5f8c1b8 100644
--- a/ld/testsuite/ld-arm/tls-thumb1.d
+++ b/ld/testsuite/ld-arm/tls-thumb1.d
@@ -38,7 +38,7 @@ Disassembly of section .text:
 
 000081a0 <__unnamed_veneer>:
 .*: 4778       bx pc
-.*: 46c0       nop ; .*
+.*: e7fd       b.n .+ <.+>
 .*: e59f1000 ldr r1, \[pc\] ; .*
 .*: e081f00f add pc, r1, pc
 .*: ffffffa0 .word 0xffffffa0
@@ -67,7 +67,7 @@ Disassembly of section .foo:
 
 0400103c <__unnamed_veneer>:
 .*: 4778       bx pc
-.*: 46c0       nop ; .*
+.*: e7fd       b.n .+ <.+>
 .*: e59f1000 ldr r1, \[pc\] ; .*
 .*: e081f00f add pc, r1, pc
 .*: fc007104 .word 0xfc007104
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Failures on Ubuntu-Aarch64-m64, branch master

gdb-buildbot
Buildername:
        Ubuntu-Aarch64-m64

Worker:
        ubuntu-aarch64

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/8/builds/552

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Ubuntu-Aarch64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> FAIL: gdb.base/info-os.exp: continue
PASS -> FAIL: gdb.base/info-os.exp: get file descriptors
PASS -> FAIL: gdb.base/info-os.exp: get internet-domain sockets
PASS -> FAIL: gdb.base/info-os.exp: get message queues
PASS -> FAIL: gdb.base/info-os.exp: get process groups
PASS -> FAIL: gdb.base/info-os.exp: get semaphores
PASS -> FAIL: gdb.base/info-os.exp: get shared-memory regions
PASS -> FAIL: gdb.base/info-os.exp: get threads
PASS -> FAIL: gdb.base/info-os.exp: info os unknown_entry
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Ubuntu-Aarch64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Ubuntu-Aarch64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-i686, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-i686

Worker:
        fedora-x86-64-2

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/18/builds/617

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-i686/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "faas "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "faas -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "faas -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply 1 "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply 1 -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply 1 -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply all "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply all -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply all -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply level 0 "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply level 0 -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "frame apply level 0 -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "tfaas "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "tfaas -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: cmd complete "tfaas -s "
PASS -> UNRESOLVED: gdb.base/options.exp: test-frame-apply: frame apply 1 -- -
PASS -> UNRESOLVED: gdb.base/options.exp: test-frame-apply: frame apply all -- -
PASS -> UNRESOLVED: gdb.base/options.exp: test-frame-apply: frame apply level 0 -- -
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "faas "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "faas -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "faas -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply 1 "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply 1 -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply 1 -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply all "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply all -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply all -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply level 0 "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply level 0 -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "frame apply level 0 -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "tfaas "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "tfaas -- -"
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: tab complete "tfaas -s "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: cmd complete "faas -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: cmd complete "frame apply 1 -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: cmd complete "frame apply all -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: cmd complete "frame apply level 0 -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: cmd complete "tfaas -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: tab complete "faas -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: tab complete "frame apply 1 -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: tab complete "frame apply all -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: tab complete "frame apply level 0 -- "
PASS -> FAIL: gdb.base/options.exp: test-frame-apply: trailing-space: tab complete "tfaas -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "taas "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "taas -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "taas -c "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply 1 "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply 1 -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply 1 -c "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply all "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply all -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: cmd complete "thread apply all -c "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "taas "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "taas -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "taas -c "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply 1 "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply 1 -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply 1 -c "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply all "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply all -- -"
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: tab complete "thread apply all -c "
PASS -> UNRESOLVED: gdb.base/options.exp: test-thread-apply: thread apply 1 -- -
PASS -> UNRESOLVED: gdb.base/options.exp: test-thread-apply: thread apply all -- -
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: cmd complete "taas -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: cmd complete "thread apply 1 -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: cmd complete "thread apply all -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: tab complete "taas -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: tab complete "thread apply 1 -- "
PASS -> FAIL: gdb.base/options.exp: test-thread-apply: trailing-space: tab complete "thread apply all -- "
PASS -> FAIL: gdb.base/style.exp: set width 30
PASS -> FAIL: gdb.base/with.exp: completion: cmd complete "with print elements unlimited -- "
PASS -> FAIL: gdb.base/with.exp: completion: tab complete "with print elements unlimited -- "
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=off: cond_bp_target=1: inferior 1 exited
PASS -> FAIL: gdb.tui/basic.exp: asm box
PASS -> FAIL: gdb.tui/basic.exp: asm box in split layout
PASS -> FAIL: gdb.tui/basic.exp: asm window shows main
PASS -> FAIL: gdb.tui/basic.exp: list main
PASS -> FAIL: gdb.tui/basic.exp: split layout contents
PASS -> FAIL: gdb.tui/empty.exp: src: 80x24: box 1
PASS -> FAIL: gdb.tui/list.exp: asm window shows main
PASS -> FAIL: gdb.tui/list.exp: initial source listing
PASS -> FAIL: gdb.tui/list.exp: list main
PASS -> FAIL: gdb.tui/main.exp: show main after file
PASS -> FAIL: gdb.tui/regs.exp: register box
PASS -> FAIL: gdb.tui/regs.exp: source at startup
PASS -> FAIL: gdb.tui/resize.exp: source at startup
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-i686/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-i686/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-x86_64-cc-with-index, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-x86_64-cc-with-index

Worker:
        fedora-x86-64-3

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/20/builds/617

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-x86_64-cc-with-index/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=off: cond_bp_target=0: inferior 1 exited
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=on: cond_bp_target=0: inferior 1 exited
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-cc-with-index/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-cc-with-index/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-x86_64-m64, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-x86_64-m64

Worker:
        fedora-x86-64-1

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/3/builds/639

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-x86_64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> KFAIL: gdb.threads/non-ldr-exit.exp: program exits normally
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=off: cond_bp_target=0: inferior 1 exited
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-x86_64-native-extended-gdbserver-m64, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-x86_64-native-extended-gdbserver-m64

Worker:
        fedora-x86-64-3

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/2/builds/615

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=on: cond_bp_target=0: inferior 1 exited
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=on: cond_bp_target=1: inferior 1 exited
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m64/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-x86_64-native-extended-gdbserver-m32, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-x86_64-native-extended-gdbserver-m32

Worker:
        fedora-x86-64-2

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/4/builds/614

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
new FAIL: gdb.base/corefile.exp: core-file warning-free
FAIL -> UNRESOLVED: gdb.mi/mi-exec-run.exp: inferior-tty=main: mi=main: force-fail=1: run failure detected
FAIL -> UNRESOLVED: gdb.mi/mi-exec-run.exp: inferior-tty=main: mi=separate: force-fail=1: run failure detected
FAIL -> UNRESOLVED: gdb.mi/mi-exec-run.exp: inferior-tty=separate: mi=main: force-fail=1: run failure detected
FAIL -> UNRESOLVED: gdb.mi/mi-exec-run.exp: inferior-tty=separate: mi=separate: force-fail=1: run failure detected
PASS -> UNRESOLVED: gdb.threads/attach-into-signal.exp: threaded: attach
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-extended-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>

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Failures on Fedora-x86_64-native-gdbserver-m32, branch master

gdb-buildbot
In reply to this post by gdb-buildbot
Buildername:
        Fedora-x86_64-native-gdbserver-m32

Worker:
        fedora-x86-64-4

Full Build URL:
        https://gdb-buildbot.osci.io/#builders/24/builds/614

Author:
        Tamar Christina <[hidden email]>

Commit tested:
        b4e87f2c1eee99dee805e3828514f8afa162f9ba

Subject of commit:
        Arm: Fix performance issue with thumb-2 tailcalls

Testsuite logs (gdb.sum, gdb.log and others):
        https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba/

*** Diff to previous build ***
==============================================
PASS -> KFAIL: gdb.threads/process-dies-while-handling-bp.exp: non_stop=off: cond_bp_target=0: inferior 1 exited
==============================================

*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.gz>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

        <https://gdb-buildbot.osci.io/results/Fedora-x86_64-native-gdbserver-m32/b4/b4e87f2c1eee99dee805e3828514f8afa162f9ba//xfail.table.gz>