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[FastISel] Make isInTailCallPosition independent of SelectionDAG.

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Break out the arguemnts required from SelectionDAG, so that this function can
also be used by FastISel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka
2014-07-11 20:50:47 +00:00
parent 2f58a513f1
commit 56b7de65b0
3 changed files with 9 additions and 8 deletions
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9
lib/CodeGen/Analysis.cpp
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@ -475,7 +475,8 @@ static bool nextRealType(SmallVectorImpl<CompositeType *> &SubTypes,
/// between it and the return.
///
/// This function only tests target-independent requirements.
bool llvm::isInTailCallPosition(ImmutableCallSite CS, const SelectionDAG &DAG) {
bool llvm::isInTailCallPosition(ImmutableCallSite CS, const TargetMachine &TM,
const TargetLoweringBase &TLI) {
const Instruction *I = CS.getInstruction();
const BasicBlock *ExitBB = I->getParent();
const TerminatorInst *Term = ExitBB->getTerminator();
@ -490,8 +491,7 @@ bool llvm::isInTailCallPosition(ImmutableCallSite CS, const SelectionDAG &DAG) {
// longjmp on x86), it can end up causing miscompilation that has not
// been fully understood.
if (!Ret &&
(!DAG.getTarget().Options.GuaranteedTailCallOpt ||
!isa<UnreachableInst>(Term)))
(!TM.Options.GuaranteedTailCallOpt || !isa<UnreachableInst>(Term)))
return false;
// If I will have a chain, make sure no other instruction that will have a
@ -509,8 +509,7 @@ bool llvm::isInTailCallPosition(ImmutableCallSite CS, const SelectionDAG &DAG) {
return false;
}
return returnTypeIsEligibleForTailCall(ExitBB->getParent(), I, Ret,
*DAG.getTarget().getTargetLowering());
return returnTypeIsEligibleForTailCall(ExitBB->getParent(), I, Ret, TLI);
}
bool llvm::returnTypeIsEligibleForTailCall(const Function *F,