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Allow some automatic tailcall optimization without changing ABI.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-01-26 23:13:04 +00:00
parent 1613f40bab
commit 11e679324b
1 changed files with 1 additions and 6 deletions
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7
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -5122,9 +5122,7 @@ void SelectionDAGBuilder::visitCall(CallInst &I) {
// Check if we can potentially perform a tail call. More detailed checking is // Check if we can potentially perform a tail call. More detailed checking is
// be done within LowerCallTo, after more information about the call is known. // be done within LowerCallTo, after more information about the call is known.
bool isTailCall = PerformTailCallOpt && I.isTailCall(); LowerCallTo(&I, Callee, I.isTailCall());
LowerCallTo(&I, Callee, isTailCall);
} }
/// getCopyFromRegs - Emit a series of CopyFromReg nodes that copies from /// getCopyFromRegs - Emit a series of CopyFromReg nodes that copies from
@ -6118,9 +6116,6 @@ TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
SDValue Callee, SDValue Callee,
ArgListTy &Args, SelectionDAG &DAG, DebugLoc dl, ArgListTy &Args, SelectionDAG &DAG, DebugLoc dl,
unsigned Order) { unsigned Order) {
assert((!isTailCall || PerformTailCallOpt) &&
"isTailCall set when tail-call optimizations are disabled!");
// Handle all of the outgoing arguments. // Handle all of the outgoing arguments.
SmallVector<ISD::OutputArg, 32> Outs; SmallVector<ISD::OutputArg, 32> Outs;
for (unsigned i = 0, e = Args.size(); i != e; ++i) { for (unsigned i = 0, e = Args.size(); i != e; ++i) {