forked from OSchip/llvm-project
283f5a198a
The GlobalISel combiner currently uses sign extension when manipulating the LHS constant when combining a sequence of the following sequence of machine instructions into a single constant: ``` %0:_(s32) = G_CONSTANT i32 <CONSTANT> %1:_(p0) = G_INTTOPTR %0:_(s32) %2:_(s64) = G_CONSTANT i64 <CONSTANT> %3:_(p0) = G_PTR_ADD %1:_, %2:_(s64) ``` This causes an issue when the bit width of the first contant and the target pointer size are different, as G_INTTOPTR has no sign extension semantics. This patch fixes this by capture an arbitrary precision in when matching the constant, allowing the matching function to correctly zero extend it. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D116941 |
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| .. | ||
| CMakeLists.txt | ||
| CSEInfo.cpp | ||
| CSEMIRBuilder.cpp | ||
| CallLowering.cpp | ||
| Combiner.cpp | ||
| CombinerHelper.cpp | ||
| GISelChangeObserver.cpp | ||
| GISelKnownBits.cpp | ||
| GlobalISel.cpp | ||
| IRTranslator.cpp | ||
| InlineAsmLowering.cpp | ||
| InstructionSelect.cpp | ||
| InstructionSelector.cpp | ||
| LegacyLegalizerInfo.cpp | ||
| LegalityPredicates.cpp | ||
| LegalizeMutations.cpp | ||
| Legalizer.cpp | ||
| LegalizerHelper.cpp | ||
| LegalizerInfo.cpp | ||
| LoadStoreOpt.cpp | ||
| Localizer.cpp | ||
| LostDebugLocObserver.cpp | ||
| MachineIRBuilder.cpp | ||
| RegBankSelect.cpp | ||
| RegisterBank.cpp | ||
| RegisterBankInfo.cpp | ||
| Utils.cpp | ||