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f0d4a0534b
Previously we'd always lower @llvm.{sin,cos}.f32 to {sin.cos}.approx.f32
instruction even when unsafe FP math was not allowed.
Clang-generated IR is not affected by this as it uses precise sin/cos
from CUDA's libdevice when unsafe math is disabled.
Differential Revision: https://reviews.llvm.org/D28619
llvm-svn: 291936
56 lines
1.3 KiB
LLVM
56 lines
1.3 KiB
LLVM
; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
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declare float @llvm.nvvm.sqrt.f(float)
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; CHECK-LABEL: sqrt_div
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; CHECK: sqrt.rn.f32
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; CHECK: div.rn.f32
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define float @sqrt_div(float %a, float %b) {
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%t1 = tail call float @llvm.nvvm.sqrt.f(float %a)
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%t2 = fdiv float %t1, %b
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ret float %t2
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}
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; CHECK-LABEL: sqrt_div_fast
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; CHECK: sqrt.approx.f32
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; CHECK: div.approx.f32
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define float @sqrt_div_fast(float %a, float %b) #0 {
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%t1 = tail call float @llvm.nvvm.sqrt.f(float %a)
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%t2 = fdiv float %t1, %b
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ret float %t2
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}
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; CHECK-LABEL: fadd
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; CHECK: add.rn.f32
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define float @fadd(float %a, float %b) {
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%t1 = fadd float %a, %b
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ret float %t1
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}
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; CHECK-LABEL: fadd_ftz
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; CHECK: add.rn.ftz.f32
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define float @fadd_ftz(float %a, float %b) #1 {
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%t1 = fadd float %a, %b
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ret float %t1
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}
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declare float @llvm.sin.f32(float)
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declare float @llvm.cos.f32(float)
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; CHECK-LABEL: fsin_approx
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; CHECK: sin.approx.f32
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define float @fsin_approx(float %a) #0 {
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%r = tail call float @llvm.sin.f32(float %a)
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ret float %r
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}
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; CHECK-LABEL: fcos_approx
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; CHECK: cos.approx.f32
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define float @fcos_approx(float %a) #0 {
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%r = tail call float @llvm.cos.f32(float %a)
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ret float %r
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}
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attributes #0 = { "unsafe-fp-math" = "true" }
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attributes #1 = { "nvptx-f32ftz" = "true" }
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