diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2010-03-26 02:13:13 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-03-26 02:13:13 +0000 |
| commit | 00a620c61e785349ac4059d89f62707c8f0e2c2c (patch) | |
| tree | 99e3140558b35007479f3b7944c7c6054fb1b823 /llvm/lib/Target/X86/X86ISelLowering.cpp | |
| parent | eb50ac5ccc65943ca0b20f469ce3a89464221542 (diff) | |
| download | bcm5719-llvm-00a620c61e785349ac4059d89f62707c8f0e2c2c.tar.gz bcm5719-llvm-00a620c61e785349ac4059d89f62707c8f0e2c2c.zip | |
Allow trivial sibcall of vararg callee when no arguments are being passed.
llvm-svn: 99598
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 75e6f505484..d08dfc4eab5 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -2301,8 +2301,9 @@ X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee, // Look for obvious safe cases to perform tail call optimization that does not // requite ABI changes. This is what gcc calls sibcall. - // Do not sibcall optimize vararg calls for now. - if (isVarArg) + // Do not sibcall optimize vararg calls unless the call site is not passing any + // arguments. + if (isVarArg && !Outs.empty()) return false; // Also avoid sibcall optimization if either caller or callee uses struct |
