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Attempt to handle MRMInitReg in emitVEXOpcodePrefix. Hopefully fixes PR12711.

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llvm-svn: 155896
This commit is contained in:
Craig Topper 2012-05-01 06:34:01 +00:00
parent d8b3eaee6d
commit 0272669dd1
1 changed files with 12 additions and 1 deletions
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13
lib/Target/X86/X86CodeEmitter.cpp
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@ -939,7 +939,18 @@ void Emitter<CodeEmitter>::emitVEXOpcodePrefix(uint64_t TSFlags,
// Classify VEX_B, VEX_4V, VEX_R, VEX_X
unsigned CurOp = 0;
switch (TSFlags & X86II::FormMask) {
case X86II::MRMInitReg: llvm_unreachable("FIXME: Remove this!");
case X86II::MRMInitReg:
// Duplicate register.
if (X86II::isX86_64ExtendedReg(MI.getOperand(CurOp).getReg()))
VEX_R = 0x0;
if (HasVEX_4V)
VEX_4V = getVEXRegisterEncoding(MI, CurOp);
if (X86II::isX86_64ExtendedReg(MI.getOperand(CurOp).getReg()))
VEX_B = 0x0;
if (HasVEX_4VOp3)
VEX_4V = getVEXRegisterEncoding(MI, CurOp);
break;
case X86II::MRMDestMem: {
// MRMDestMem instructions forms:
// MemAddr, src1(ModR/M)