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[IR] llvm.reloc.none intrinsic for no-op symbol references #147427
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Original file line number | Diff line number | Diff line change |
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@@ -7757,6 +7757,19 @@ void SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, | |
return; | ||
} | ||
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case Intrinsic::reloc_none: { | ||
SDValue V = getValue(I.getArgOperand(0)); | ||
auto *GA = dyn_cast<GlobalAddressSDNode>(V); | ||
if (!GA) | ||
report_fatal_error("llvm.reloc.none operand must be a GlobalValue"); | ||
Comment on lines
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Belongs in IR verifier |
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SDValue Ops[2]; | ||
Ops[0] = getRoot(); | ||
Ops[1] = DAG.getTargetGlobalAddress(GA->getGlobal(), sdl, V.getValueType(), | ||
GA->getOffset()); | ||
DAG.setRoot(DAG.getNode(ISD::RELOC_NONE, sdl, MVT::Other, Ops)); | ||
return; | ||
} | ||
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||
case Intrinsic::eh_exceptionpointer: | ||
case Intrinsic::eh_exceptioncode: { | ||
// Get the exception pointer vreg, copy from it, and resize it to fit. | ||
|
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Why against a pointer type? We have the llvm.amdgcn.reloc.constant intrinsic for similar purposes but uses metadata for the string name of the symbol
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The reason being... I had no idea you could do that! This is essentially my first time monkeying in the IR; I've been a backend/linker jocky for the most part. But thanks, that does seem a lot semantically simpler. I'll make the change throughout the PR chain and report back here.