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Eliminate target hook IsEligibleForTailCallOptimization.

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Target independent isel should always pass along the "tail call" property. Change
target hook LowerCall's parameter "isTailCall" into a refernce. If the target
decides it's impossible to honor the tail call request, it should set isTailCall
to false to make target independent isel happy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94626 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-01-27 00:07:07 +00:00
parent 381993f1f2
commit 0c439eb2c8
26 changed files with 84 additions and 77 deletions
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4
lib/Target/SystemZ/SystemZISelLowering.cpp
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@@ -250,11 +250,13 @@ SystemZTargetLowering::LowerFormalArguments(SDValue Chain,
SDValue
SystemZTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
CallingConv::ID CallConv, bool isVarArg,
bool isTailCall,
bool &isTailCall,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) {
// SystemZ target does not yet support tail call optimization.
isTailCall = false;
switch (CallConv) {
default: