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| author | Nick Lewycky <nicholas@mxc.ca> | 2012-01-19 00:34:10 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2012-01-19 00:34:10 +0000 |
| commit | 22de16dc7582dac43429ce0dcb374604020c01f5 (patch) | |
| tree | cdf90f822164c39bf7a6c99518381a49b0cbf7b7 /lib | |
| parent | 9b159710ebe8a37cba38ca0c5b465e362bd68af7 (diff) | |
| download | external_llvm-22de16dc7582dac43429ce0dcb374604020c01f5.zip external_llvm-22de16dc7582dac43429ce0dcb374604020c01f5.tar.gz external_llvm-22de16dc7582dac43429ce0dcb374604020c01f5.tar.bz2 | |
Add a TargetOption for disabling tail calls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148442 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 91dc7b5..858ebc5 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1732,7 +1732,7 @@ static bool IsTailCallConvention(CallingConv::ID CC) { } bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const { - if (!CI->isTailCall()) + if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls) return false; CallSite CS(CI); @@ -2133,6 +2133,9 @@ X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee, bool IsStructRet = CallIsStructReturn(Outs); bool IsSibcall = false; + if (MF.getTarget().Options.DisableTailCalls) + isTailCall = false; + if (isTailCall) { // Check if it's really possible to do a tail call. isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, |