[llvm-commits] [llvm] r119286 - in /llvm/trunk: lib/Target/X86/X86AsmBackend.cpp test/MC/MachO/x86_32-optimal_nop.s

[Rafael Espindola]

Author: rafael
Date: Mon Nov 15 17:10:30 2010
New Revision: 119286

URL: http://llvm.org/viewvc/llvm-project?rev=119286&view=rev
Log:
Change the 11 byte nop to be a single instruction.

Modified:
    llvm/trunk/lib/Target/X86/X86AsmBackend.cpp
    llvm/trunk/test/MC/MachO/x86_32-optimal_nop.s

Modified: llvm/trunk/lib/Target/X86/X86AsmBackend.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86AsmBackend.cpp?rev=119286&r1=119285&r2=119286&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86AsmBackend.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86AsmBackend.cpp Mon Nov 15 17:10:30 2010
@@ -235,10 +235,8 @@
     {0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
     // nopw %cs:0L(%[re]ax,%[re]ax,1)
     {0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
-    // nopl 0(%[re]ax,%[re]ax,1)
-    // nopw 0(%[re]ax,%[re]ax,1)
-    {0x0f, 0x1f, 0x44, 0x00, 0x00,
-     0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00},
+    // nopw %cs:0L(%[re]ax,%[re]ax,1)
+    {0x66, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
     // nopw 0(%[re]ax,%[re]ax,1)
     // nopw 0(%[re]ax,%[re]ax,1)
     {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00,

Modified: llvm/trunk/test/MC/MachO/x86_32-optimal_nop.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/MachO/x86_32-optimal_nop.s?rev=119286&r1=119285&r2=119286&view=diff
==============================================================================
--- llvm/trunk/test/MC/MachO/x86_32-optimal_nop.s (original)
+++ llvm/trunk/test/MC/MachO/x86_32-optimal_nop.s Mon Nov 15 17:10:30 2010
@@ -104,7 +104,7 @@
         ret
         ret
         # nopw %cs:0L(%[re]ax,%[re]ax,1)
-        # 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
+        # 0x66, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
         .align 4, 0x90
         ret
 # 12 byte nop test
@@ -192,7 +192,7 @@
 // CHECK:    ),
 // CHECK:   ('_relocations', [
 // CHECK:   ])
-// CHECK:   ('_section_data', 'c390c300 00000000 00000000 00000000 c3c36690 c3000000 00000000 00000000 c30f1f00 c3000000 00000000 00000000 c3c3c3c3 0f1f4000 c3000000 00000000 c3c3c30f 1f440000 c3000000 00000000 c3c3660f 1f440000 c3000000 00000000 c30f1f80 00000000 c3000000 00000000 c3c3c3c3 c3c3c3c3 c3000000 00000000 c3c3c3c3 c3c3c366 0f1f8400 00000000 c3000000 00000000 00000000 00000000 c3c3c3c3 c3c3c366 0f1f8400 00000000 c3000000 00000000 00000000 00000000 c3c3c3c3 c30f1f44 0000660f 1f440000 c3000000 00000000 00000000 00000000 c3c3c3c3 660f1f44 0000660f 1f440000 c3000000 00000000 00000000 00000000 c3c3c366 0f1f4400 000f1f80 00000000 c3000000 00000000 00000000 00000000 c3c30f1f 80000000 000f1f80 00000000 c3000000 00000000 00000000 00000000 c30f1f80 00000000 0f1f8400 00000000 c3')
+// CHECK:   ('_section_data', 'c390c300 00000000 00000000 00000000 c3c36690 c3000000 00000000 00000000 c30f1f00 c3000000 00000000 00000000 c3c3c3c3 0f1f4000 c3000000 00000000 c3c3c30f 1f440000 c3000000 00000000 c3c3660f 1f440000 c3000000 00000000 c30f1f80 00000000 c3000000 00000000 c3c3c3c3 c3c3c3c3 c3000000 00000000 c3c3c3c3 c3c3c366 0f1f8400 00000000 c3000000 00000000 00000000 00000000 c3c3c3c3 c3c3c366 0f1f8400 00000000 c3000000 00000000 00000000 00000000 c3c3c3c3 c366662e 0f1f8400 00000000 c3000000 00000000 00000000 00000000 c3c3c3c3 660f1f44 0000660f 1f440000 c3000000 00000000 00000000 00000000 c3c3c366 0f1f4400 000f1f80 00000000 c3000000 00000000 00000000 00000000 c3c30f1f 80000000 000f1f80 00000000 c3000000 00000000 00000000 00000000 c30f1f80 00000000 0f1f8400 00000000 c3')
 // CHECK:     # Section 1
 // CHECK:    (('section_name', '__const\x00\x00\x00\x00\x00\x00\x00\x00\x00')
 // CHECK:     ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')