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| author | Kevin Enderby <enderby@apple.com> | 2010-02-25 18:46:04 +0000 |
|---|---|---|
| committer | Kevin Enderby <enderby@apple.com> | 2010-02-25 18:46:04 +0000 |
| commit | d74acb0c78c3b738ae8f313461433105fb18543b (patch) | |
| tree | 23e8c2129a51448c0244e74d1e04c8b720d2837a /test | |
| parent | 55c8a7e778173236fb55f6274019b85d0b9c7458 (diff) | |
| download | llvm-d74acb0c78c3b738ae8f313461433105fb18543b.tar.gz llvm-d74acb0c78c3b738ae8f313461433105fb18543b.tar.bz2 llvm-d74acb0c78c3b738ae8f313461433105fb18543b.tar.xz | |
This is a patch to the assembler frontend to detect when aligning a text
section with TextAlignFillValue and calls EmitCodeAlignment() instead of
calling EmitValueToAlignment(). This allows x86 assembly code to be aligned
with optimal nops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97158 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/MC/MachO/Darwin/optimal_nop.s | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/test/MC/MachO/Darwin/optimal_nop.s b/test/MC/MachO/Darwin/optimal_nop.s new file mode 100644 index 0000000000..29cb0738e1 --- /dev/null +++ b/test/MC/MachO/Darwin/optimal_nop.s @@ -0,0 +1,156 @@ +// Validate that we can assemble this file exactly like the platform +// assembler. +// +// RUN: llvm-mc -filetype=obj -triple i386-apple-darwin10 -o %t.mc.o %s +// RUN: as -arch i386 -o %t.as.o %s +// RUN: diff %t.mc.o %t.as.o + +# 1 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + # nop + # 0x90 + .align 1, 0x90 + ret +# 2 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + # xchg %ax,%ax + # 0x66, 0x90 + .align 2, 0x90 + ret +# 3 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + # nopl (%[re]ax) + # 0x0f, 0x1f, 0x00 + .align 2, 0x90 + ret +# 4 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + # nopl 0(%[re]ax) + # 0x0f, 0x1f, 0x40, 0x00 + .align 3, 0x90 + ret +# 5 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + # nopl 0(%[re]ax,%[re]ax,1) + # 0x0f, 0x1f, 0x44, 0x00, 0x00 + .align 3, 0x90 + ret +# 6 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + # nopw 0(%[re]ax,%[re]ax,1) + # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 + .align 3, 0x90 + ret +# 7 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + # nopl 0L(%[re]ax) + # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 + .align 3, 0x90 + ret +# 8 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + ret + ret + ret + ret + # nopl 0L(%[re]ax,%[re]ax,1) + # 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 + .align 3, 0x90 + ret +# 9 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + ret + ret + ret + # nopw 0L(%[re]ax,%[re]ax,1) + # 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret +# 10 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + ret + ret + ret + # nopw %cs:0L(%[re]ax,%[re]ax,1) + # 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret +# 11 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + ret + # nopw %cs:0L(%[re]ax,%[re]ax,1) + # 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret +# 12 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + ret + # nopw 0(%[re]ax,%[re]ax,1) + # nopw 0(%[re]ax,%[re]ax,1) + # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00, + # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 + .align 4, 0x90 + ret +# 13 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + ret + # nopw 0(%[re]ax,%[re]ax,1) + # nopl 0L(%[re]ax) + # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00, + # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret +# 14 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + ret + # nopl 0L(%[re]ax) + # nopl 0L(%[re]ax) + # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00, + # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret +# 15 byte nop test + .align 4, 0 # start with 16 byte alignment filled with zeros + ret + # nopl 0L(%[re]ax) + # nopl 0L(%[re]ax,%[re]ax,1) + # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00, + # 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 + .align 4, 0x90 + ret |