From ff72e74d34197cd8775ed32c6e06054b936a1cad Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Tue, 1 May 2012 06:34:01 +0000 Subject: [PATCH] Attempt to handle MRMInitReg in emitVEXOpcodePrefix. Hopefully fixes PR12711. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155896 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86CodeEmitter.cpp | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 79404da9944..09524fe2e47 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -939,7 +939,18 @@ void Emitter::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) -- 2.11.0