[X86] Add register use/def for wrmsr and rdmsr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228515 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86InstrSystem.td b/lib/Target/X86/X86InstrSystem.td
index c2b593ac70b0c7d7f1f9e450f0179f5bca3717c4..0350566f8b9b6048e23a0cd22008d828d2336cfe 100644 (file)
--- a/lib/Target/X86/X86InstrSystem.td
+++ b/lib/Target/X86/X86InstrSystem.td
@@ -438,7 +438,9 @@ def LLDT16m : I<0x00, MRM2m, (outs), (ins i16mem:$src),
 //===----------------------------------------------------------------------===//
 // Specialized register support
 let SchedRW = [WriteSystem] in {
+let Uses = [EAX, ECX, EDX] in
 def WRMSR : I<0x30, RawFrm, (outs), (ins), "wrmsr", [], IIC_WRMSR>, TB;
+let Defs = [EAX, EDX], Uses = [ECX] in
 def RDMSR : I<0x32, RawFrm, (outs), (ins), "rdmsr", [], IIC_RDMSR>, TB;
 
 let Defs = [RAX, RDX], Uses = [ECX] in