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3dc84349d9
## Description Applies LLVM patches that have not been backported to the major version used in our submodule: * [LLVM PR #163679](https://github.com/llvm/llvm-project/pull/163679) * *"[RISCV] Allow large div peephole optimization for minsize"* * Fixes peephole optimization of large integers when `minsize` function attribute is set. * (Our revive codebase used a workaround that can be removed once this 500 PR is merged and we publish a new LLVM release.) * [LLVM PR #190219](https://github.com/llvm/llvm-project/pull/190219) * *"[TargetLowering] Speculative fix for a non-determinism issue between different compilers"* * Operand ordering of `mul i256` were different depending on the target ABI when building LLVM, producing different RISC-V and PVM bytecode for our Windows vs macOS/linux builds. * The bytecode divergence (yet functionally equivalent) affected Solidity contracts containing a value [multiplied by itself](https://github.com/llvm/llvm-project/issues/190148) (e.g. via explicit squaring or exponentiation), manifesting primarily when using optimization level `-O0`.
16 lines
715 B
Diff
16 lines
715 B
Diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
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index eb875583ff..169465e18f 100644
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--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
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+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
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@@ -24830,7 +24830,8 @@ bool RISCVTargetLowering::isIntDivCheap(EVT VT, AttributeList Attr) const {
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// instruction, as it is usually smaller than the alternative sequence.
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// TODO: Add vector division?
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bool OptSize = Attr.hasFnAttr(Attribute::MinSize);
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- return OptSize && !VT.isVector();
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+ return OptSize && !VT.isVector() &&
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+ VT.getSizeInBits() <= getMaxDivRemBitWidthSupported();
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}
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bool RISCVTargetLowering::preferScalarizeSplat(SDNode *N) const {
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