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release/19.x: [DwarfEhPrepare] Assign dummy debug location for more inserted _Unwind_Resume calls (#105513) #105846

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Merged
merged 1 commit into from
Aug 26, 2024
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release/19.x: [DwarfEhPrepare] Assign dummy debug location for more inserted _Unwind_Resume calls (#105513) #105846

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7 changes: 7 additions & 0 deletions llvm/lib/CodeGen/DwarfEHPrepare.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -293,6 +293,13 @@ bool DwarfEHPrepare::InsertUnwindResumeCalls() {
// Call the function.
CallInst *CI =
CallInst::Create(RewindFunction, RewindFunctionArgs, "", UnwindBB);
// The verifier requires that all calls of debug-info-bearing functions
// from debug-info-bearing functions have a debug location (for inlining
// purposes). Assign a dummy location to satisfy the constraint.
Function *RewindFn = dyn_cast<Function>(RewindFunction.getCallee());
if (RewindFn && RewindFn->getSubprogram())
if (DISubprogram *SP = F.getSubprogram())
CI->setDebugLoc(DILocation::get(SP->getContext(), 0, 0, SP));
CI->setCallingConv(RewindFunctionCallingConv);

// We never expect _Unwind_Resume to return.
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