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Introduce "expect" intrinsic instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134516 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak
2011-07-06 18:22:43 +00:00
parent d7c7e2ff7d
commit 9da9934e27
15 changed files with 678 additions and 1 deletions
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7
lib/CodeGen/IntrinsicLowering.cpp
View File

@ -353,6 +353,13 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
report_fatal_error("Code generator does not support intrinsic function '"+
Callee->getName()+"'!");
case Intrinsic::expect: {
// Just replace __builtin_expect(exp, c) with EXP.
Value *V = CI->getArgOperand(0);
CI->replaceAllUsesWith(V);
break;
}
// The setjmp/longjmp intrinsics should only exist in the code if it was
// never optimized (ie, right out of the CFE), or if it has been hacked on
// by the lowerinvoke pass. In both cases, the right thing to do is to

7
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -4771,6 +4771,13 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
case Intrinsic::flt_rounds:
setValue(&I, DAG.getNode(ISD::FLT_ROUNDS_, dl, MVT::i32));
return 0;
case Intrinsic::expect: {
// Just replace __builtin_expect(exp, c) with EXP.
setValue(&I, getValue(I.getArgOperand(0)));
return 0;
}
case Intrinsic::trap: {
StringRef TrapFuncName = getTrapFunctionName();
if (TrapFuncName.empty()) {