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make simd_reduce_{mul,add}_unordered use only the 'reassoc' flag, not all fast-math flags

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This commit is contained in:
Ralf Jung 2024-02-18 23:10:34 +01:00
parent 25fe3cc69d
commit 3dc631a61a
7 changed files with 30 additions and 22 deletions
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15
compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
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@ -418,11 +418,17 @@ extern "C" LLVMAttributeRef LLVMRustCreateMemoryEffectsAttr(LLVMContextRef C,
}
}
<<<<<<< HEAD
// Enable all fast-math flags, including those which will cause floating-point operations
// to return poison for some well-defined inputs. This function can only be used to build
// unsafe Rust intrinsics. That unsafety does permit additional optimizations, but at the
// time of writing, their value is not well-understood relative to those enabled by
// LLVMRustSetAlgebraicMath.
||||||| parent of 019019d83e2 (make simd_reduce_{mul,add}_unordered use only the 'reassoc' flag, not all fast-math flags)
// Enable a fast-math flag
=======
// Enable all fast-math flags
>>>>>>> 019019d83e2 (make simd_reduce_{mul,add}_unordered use only the 'reassoc' flag, not all fast-math flags)
//
// https://llvm.org/docs/LangRef.html#fast-math-flags
extern "C" void LLVMRustSetFastMath(LLVMValueRef V) {
@ -450,6 +456,15 @@ extern "C" void LLVMRustSetAlgebraicMath(LLVMValueRef V) {
}
}
// Enable the reassoc fast-math flag
//
// https://llvm.org/docs/LangRef.html#fast-math-flags
extern "C" void LLVMRustSetAllowReassoc(LLVMValueRef V) {
if (auto I = dyn_cast<Instruction>(unwrap<Value>(V))) {
I->setHasAllowReassoc(true);
}
}
extern "C" LLVMValueRef
LLVMRustBuildAtomicLoad(LLVMBuilderRef B, LLVMTypeRef Ty, LLVMValueRef Source,
const char *Name, LLVMAtomicOrdering Order) {