diff options
| author | Reid Kleckner <reid@kleckner.net> | 2014-01-28 02:08:22 +0000 |
|---|---|---|
| committer | Reid Kleckner <reid@kleckner.net> | 2014-01-28 02:08:22 +0000 |
| commit | 1386d3f8855903aea2dc3e0eb43c53a80cd37382 (patch) | |
| tree | 154df05920eeca3a6ac3ad522fd273015b59b5f5 | |
| parent | 5ea4a545518b5fe1dbd1decc6435c8de35ec9ed1 (diff) | |
x86: add implicit defs for cpuid
This avoids miscompiling MS inline asm in LLVM where we have to infer
clobbers. Test case forthcoming in Clang.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200279 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86InstrSystem.td | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/Target/X86/X86InstrSystem.td b/lib/Target/X86/X86InstrSystem.td index e1b008e7fad..abed426bce7 100644 --- a/lib/Target/X86/X86InstrSystem.td +++ b/lib/Target/X86/X86InstrSystem.td @@ -455,8 +455,13 @@ def LMSW16r : I<0x01, MRM6r, (outs), (ins GR16:$src), "lmsw{w}\t$src", [], IIC_LMSW_MEM>, TB; def LMSW16m : I<0x01, MRM6m, (outs), (ins i16mem:$src), "lmsw{w}\t$src", [], IIC_LMSW_REG>, TB; - -def CPUID : I<0xA2, RawFrm, (outs), (ins), "cpuid", [], IIC_CPUID>, TB; + +let Defs = [EAX, EBX, ECX, EDX], Uses = [EAX, ECX] in + def CPUID32 : I<0xA2, RawFrm, (outs), (ins), "cpuid", [], IIC_CPUID>, TB, + Requires<[Not64BitMode]>; +let Defs = [RAX, RBX, RCX, RDX], Uses = [RAX, RCX] in + def CPUID64 : I<0xA2, RawFrm, (outs), (ins), "cpuid", [], IIC_CPUID>, TB, + Requires<[In64BitMode]>; } // SchedRW //===----------------------------------------------------------------------===// |