diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 936699e9b5..8800bff87f 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -2544,6 +2544,10 @@ X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, MF.getFunction()->hasStructRetAttr(), CLI.RetTy, Outs, OutVals, Ins, DAG); + if (!isTailCall && CLI.CS && CLI.CS->isMustTailCall()) + report_fatal_error("failed to perform tail call elimination on a call " + "site marked musttail"); + // Sibcalls are automatically detected tailcalls which do not require // ABI changes. if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall) |