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[X86][TableGen] Add a missing error check to make sure EVEX instructions use one PS/PD/XS/XD prefixes. 

llvm-svn: 329048
This commit is contained in:
Craig Topper 2018-04-03 06:37:01 +00:00
parent c01e47b43f
commit 7d522b6eee
1 changed files with 5 additions and 1 deletions
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6
llvm/utils/TableGen/X86RecognizableInstr.cpp
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@ -243,8 +243,12 @@ InstructionContext RecognizableInstr::insnContext() const {
insnContext = EVEX_KB(IC_EVEX_XD);
else if (OpPrefix == X86Local::XS)
insnContext = EVEX_KB(IC_EVEX_XS);
else
else if (OpPrefix == X86Local::PS)
insnContext = EVEX_KB(IC_EVEX);
else {
errs() << "Instruction does not use a prefix: " << Name << "\n";
llvm_unreachable("Invalid prefix");
}
/// eof EVEX
} else if (Encoding == X86Local::VEX || Encoding == X86Local::XOP) {
if (HasVEX_LPrefix && VEX_WPrefix == X86Local::VEX_W1) {