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aea884eb82
The motivation for the change is that we can't have pseudo-global settings for
codegen living in TargetOptions because that doesn't work with LTO.
Ideally, these reciprocal attributes will be moved to the instruction-level via
FMF, metadata, or something else. But making them function attributes is at least
an improvement over the current state.
The ingredients of this patch are:
Remove the reciprocal estimate command-line debug option.
Add TargetRecip to TargetLowering.
Remove TargetRecip from TargetOptions.
Clean up the TargetRecip implementation to work with this new scheme.
Set the default reciprocal settings in TargetLoweringBase (everything is off).
Update the PowerPC defaults, users, and tests.
Update the x86 defaults, users, and tests.
Note that if this patch needs to be reverted, the related clang patch checked in
at r283251 should be reverted too.
Differential Revision: https://reviews.llvm.org/D24816
llvm-svn: 283252
178 lines
5.6 KiB
LLVM
178 lines
5.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx | FileCheck %s --check-prefix=AVX
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declare double @__sqrt_finite(double)
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declare float @__sqrtf_finite(float)
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declare x86_fp80 @__sqrtl_finite(x86_fp80)
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declare float @llvm.sqrt.f32(float)
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declare <4 x float> @llvm.sqrt.v4f32(<4 x float>)
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declare <8 x float> @llvm.sqrt.v8f32(<8 x float>)
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define double @finite_f64_no_estimate(double %d) #0 {
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; AVX-LABEL: finite_f64_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtsd %xmm0, %xmm0, %xmm0
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; AVX-NEXT: retq
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;
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%call = tail call double @__sqrt_finite(double %d) #2
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ret double %call
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}
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; No estimates for doubles.
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define double @finite_f64_estimate(double %d) #1 {
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; AVX-LABEL: finite_f64_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtsd %xmm0, %xmm0, %xmm0
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; AVX-NEXT: retq
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;
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%call = tail call double @__sqrt_finite(double %d) #2
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ret double %call
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}
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define float @finite_f32_no_estimate(float %f) #0 {
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; AVX-LABEL: finite_f32_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtss %xmm0, %xmm0, %xmm0
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; AVX-NEXT: retq
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;
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%call = tail call float @__sqrtf_finite(float %f) #2
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ret float %call
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}
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define float @finite_f32_estimate(float %f) #1 {
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; AVX-LABEL: finite_f32_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vrsqrtss %xmm0, %xmm0, %xmm1
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; AVX-NEXT: vmulss %xmm1, %xmm0, %xmm2
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; AVX-NEXT: vmulss %xmm1, %xmm2, %xmm1
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; AVX-NEXT: vaddss {{.*}}(%rip), %xmm1, %xmm1
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; AVX-NEXT: vmulss {{.*}}(%rip), %xmm2, %xmm2
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; AVX-NEXT: vmulss %xmm1, %xmm2, %xmm1
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; AVX-NEXT: vxorps %xmm2, %xmm2, %xmm2
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; AVX-NEXT: vcmpeqss %xmm2, %xmm0, %xmm0
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; AVX-NEXT: vandnps %xmm1, %xmm0, %xmm0
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; AVX-NEXT: retq
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;
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%call = tail call float @__sqrtf_finite(float %f) #2
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ret float %call
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}
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define x86_fp80 @finite_f80_no_estimate(x86_fp80 %ld) #0 {
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; AVX-LABEL: finite_f80_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: fldt {{[0-9]+}}(%rsp)
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; AVX-NEXT: fsqrt
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; AVX-NEXT: retq
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;
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%call = tail call x86_fp80 @__sqrtl_finite(x86_fp80 %ld) #2
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ret x86_fp80 %call
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}
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; Don't die on the impossible.
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define x86_fp80 @finite_f80_estimate_but_no(x86_fp80 %ld) #1 {
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; AVX-LABEL: finite_f80_estimate_but_no:
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; AVX: # BB#0:
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; AVX-NEXT: fldt {{[0-9]+}}(%rsp)
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; AVX-NEXT: fsqrt
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; AVX-NEXT: retq
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;
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%call = tail call x86_fp80 @__sqrtl_finite(x86_fp80 %ld) #2
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ret x86_fp80 %call
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}
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define float @f32_no_estimate(float %x) #0 {
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; AVX-LABEL: f32_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtss %xmm0, %xmm0, %xmm0
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; AVX-NEXT: vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; AVX-NEXT: vdivss %xmm0, %xmm1, %xmm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call float @llvm.sqrt.f32(float %x)
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%div = fdiv fast float 1.0, %sqrt
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ret float %div
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}
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define float @f32_estimate(float %x) #1 {
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; AVX-LABEL: f32_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vrsqrtss %xmm0, %xmm0, %xmm1
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; AVX-NEXT: vmulss %xmm1, %xmm1, %xmm2
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; AVX-NEXT: vmulss %xmm2, %xmm0, %xmm0
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; AVX-NEXT: vaddss {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: vmulss {{.*}}(%rip), %xmm1, %xmm1
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; AVX-NEXT: vmulss %xmm0, %xmm1, %xmm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call float @llvm.sqrt.f32(float %x)
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%div = fdiv fast float 1.0, %sqrt
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ret float %div
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}
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define <4 x float> @v4f32_no_estimate(<4 x float> %x) #0 {
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; AVX-LABEL: v4f32_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtps %xmm0, %xmm0
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; AVX-NEXT: vmovaps {{.*#+}} xmm1 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
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; AVX-NEXT: vdivps %xmm0, %xmm1, %xmm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call <4 x float> @llvm.sqrt.v4f32(<4 x float> %x)
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%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
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ret <4 x float> %div
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}
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define <4 x float> @v4f32_estimate(<4 x float> %x) #1 {
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; AVX-LABEL: v4f32_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vrsqrtps %xmm0, %xmm1
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; AVX-NEXT: vmulps %xmm1, %xmm1, %xmm2
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; AVX-NEXT: vmulps %xmm2, %xmm0, %xmm0
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; AVX-NEXT: vaddps {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: vmulps {{.*}}(%rip), %xmm1, %xmm1
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; AVX-NEXT: vmulps %xmm0, %xmm1, %xmm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call <4 x float> @llvm.sqrt.v4f32(<4 x float> %x)
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%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
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ret <4 x float> %div
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}
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define <8 x float> @v8f32_no_estimate(<8 x float> %x) #0 {
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; AVX-LABEL: v8f32_no_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vsqrtps %ymm0, %ymm0
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; AVX-NEXT: vmovaps {{.*#+}} ymm1 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
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; AVX-NEXT: vdivps %ymm0, %ymm1, %ymm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call <8 x float> @llvm.sqrt.v8f32(<8 x float> %x)
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
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ret <8 x float> %div
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}
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define <8 x float> @v8f32_estimate(<8 x float> %x) #1 {
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; AVX-LABEL: v8f32_estimate:
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; AVX: # BB#0:
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; AVX-NEXT: vrsqrtps %ymm0, %ymm1
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; AVX-NEXT: vmulps %ymm1, %ymm1, %ymm2
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; AVX-NEXT: vmulps %ymm2, %ymm0, %ymm0
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; AVX-NEXT: vaddps {{.*}}(%rip), %ymm0, %ymm0
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; AVX-NEXT: vmulps {{.*}}(%rip), %ymm1, %ymm1
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; AVX-NEXT: vmulps %ymm0, %ymm1, %ymm0
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; AVX-NEXT: retq
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;
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%sqrt = tail call <8 x float> @llvm.sqrt.v8f32(<8 x float> %x)
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
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ret <8 x float> %div
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}
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attributes #0 = { "unsafe-fp-math"="true" "reciprocal-estimates"="!sqrtf,!vec-sqrtf,!divf,!vec-divf" }
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attributes #1 = { "unsafe-fp-math"="true" "reciprocal-estimates"="sqrt,vec-sqrt" }
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attributes #2 = { nounwind readnone }
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