613222ec33
Remove `UnsafeFPMath` in `visitFMULForFMADistributiveCombine`, `visitFSUBForFMACombine` and `visitFDIV`. All affected tests are fixed by add fast math flags manually. Propagate fast math flags when lowering fdiv in NVPTX backend, so it can produce optimized dag when `unsafe-fp-math` is absent.
71 lines
2.0 KiB
LLVM
71 lines
2.0 KiB
LLVM
; Check that we can enable/disable UnsafeFPMath via function attributes. An
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; attribute on one function should not magically apply to the next one.
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown \
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; RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=SAFE
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown \
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; RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=UNSAFE
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; The div in these functions should be converted to a mul when unsafe-fp-math
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; is enabled.
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; CHECK-LABEL: unsafe_fp_math_default0:
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define double @unsafe_fp_math_default0(double %x) {
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; UNSAFE: mulsd
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%div = fdiv arcp double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: safe_fp_math_default0:
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define double @safe_fp_math_default0(double %x) {
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; SAFE: divsd
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%div = fdiv double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: unsafe_fp_math_off:
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define double @unsafe_fp_math_off(double %x) {
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; SAFE: divsd
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; UNSAFE: divsd
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%div = fdiv double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: unsafe_fp_math_default1:
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define double @unsafe_fp_math_default1(double %x) {
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; With unsafe math enabled, can change this div to a mul.
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; UNSAFE: mulsd
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%div = fdiv arcp double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: safe_fp_math_default1:
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define double @safe_fp_math_default1(double %x) {
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; With unsafe math enabled, can change this div to a mul.
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; SAFE: divsd
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%div = fdiv double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: unsafe_fp_math_on:
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define double @unsafe_fp_math_on(double %x) {
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; SAFE: mulsd
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; UNSAFE: mulsd
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%div = fdiv arcp double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: unsafe_fp_math_default2:
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define double @unsafe_fp_math_default2(double %x) {
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; With unsafe math enabled, can change this div to a mul.
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; UNSAFE: mulsd
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%div = fdiv arcp double %x, 3.0
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ret double %div
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}
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; CHECK-LABEL: safe_fp_math_default2:
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define double @safe_fp_math_default2(double %x) {
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; With unsafe math enabled, can change this div to a mul.
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; SAFE: divsd
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%div = fdiv double %x, 3.0
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ret double %div
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}
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