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Undo r94946 now all the tests are passing again.

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llvm-svn: 94970
This commit is contained in:
Evan Cheng 2010-02-01 02:13:39 +00:00
parent 2a49e86448
commit dcc1816642
2 changed files with 4 additions and 12 deletions
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14
lib/Target/X86/X86ISelLowering.cpp
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@ -2263,17 +2263,6 @@ X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
if (isVarArg)
return false;
// Don't tail call optimize recursive call.
GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
const Function *CalleeF = G ? cast<Function>(G->getGlobal()) : 0;
if (CallerF == CalleeF)
return false;
// If it's an indirect call, conversatively return false if the caller's
// address is taken.
if (!CalleeF &&
!isa<ExternalSymbolSDNode>(Callee) && CallerF->hasAddressTaken())
return false;
// Look for obvious safe cases to perform tail call optimization.
// If the callee takes no arguments then go on to check the results of the
// call.
@ -2296,7 +2285,10 @@ X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
return true;
// If the return types match, then it's safe.
// Don't tail call optimize recursive call.
GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
if (!G) return false; // FIXME: common external symbols?
const Function *CalleeF = cast<Function>(G->getGlobal());
const Type *CalleeRetTy = CalleeF->getReturnType();
return CallerRetTy == CalleeRetTy;
}

2
test/CodeGen/X86/tailcall2.ll
View File

@ -73,7 +73,7 @@ entry:
; 32: call {{_?}}bar
; 64: t6:
; 64: callq {{_?}}t6
; 64: jmp {{_?}}t6
; 64: jmp {{_?}}bar
%0 = icmp slt i32 %x, 10
br i1 %0, label %bb, label %bb1