x64: Prevent load sinking in simd f{min,max}#9144
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fitzgen merged 1 commit intobytecodealliance:mainfrom Aug 19, 2024
Merged
x64: Prevent load sinking in simd f{min,max}#9144fitzgen merged 1 commit intobytecodealliance:mainfrom
fitzgen merged 1 commit intobytecodealliance:mainfrom
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This commit fixes an issue where a `Value` was both load-sunk and used as-is, meaning it was both sunk and not. That triggered a panic in the backend since this isn't valid. The reason for this is due to how some ISLE rules were written where a `Value` was both implicitly coerced into an `XmmMem` and an `Xmm`. This issue is similar to bytecodealliance#4815 for example. The fix in this commit is to force the operands into registers which prevents load sinking which wouldn't work here anyway. This panic was introduced in bytecodealliance#5841 which is quite old at this point. This bug does not affect WebAssembly translation due to how the `v128` type maps to `i8x16` in Cranelift by default. Closes bytecodealliance#9143
fitzgen
approved these changes
Aug 19, 2024
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This commit fixes an issue where a
Valuewas both load-sunk and used as-is, meaning it was both sunk and not. That triggered a panic in the backend since this isn't valid. The reason for this is due to how some ISLE rules were written where aValuewas both implicitly coerced into anXmmMemand anXmm. This issue is similar to #4815 for example. The fix in this commit is to force the operands into registers which prevents load sinking which wouldn't work here anyway.This panic was introduced in #5841 which is quite old at this point. This bug does not affect WebAssembly translation due to how the
v128type maps toi8x16in Cranelift by default.Closes #9143