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[InstCombine] Missed optimization in math expression: sin(x) / cos(x)…
… => tan(x) Summary: This patch enables folding sin(x) / cos(x) -> tan(x), cos(x) / sin(x) -> 1 / tan(x) under -ffast-math flag Reviewers: hfinkel, spatel Reviewed By: spatel Subscribers: andrew.w.kaylor, efriedma, scanon, llvm-commits Differential Revision: https://reviews.llvm.org/D41286 llvm-svn: 322255
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -S -instcombine < %s | FileCheck %s | ||
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define double @fdiv_cos_sin(double %a) { | ||
; CHECK-LABEL: @fdiv_cos_sin( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.cos.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call double @llvm.sin.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call double @llvm.cos.f64(double %a) | ||
%2 = call double @llvm.sin.f64(double %a) | ||
%div = fdiv double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_strict_cos_strict_sin_fast(double %a) { | ||
; CHECK-LABEL: @fdiv_strict_cos_strict_sin_fast( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.cos.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.sin.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call double @llvm.cos.f64(double %a) | ||
%2 = call fast double @llvm.sin.f64(double %a) | ||
%div = fdiv double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_fast_cos_strict_sin_strict(double %a) { | ||
; CHECK-LABEL: @fdiv_fast_cos_strict_sin_strict( | ||
; CHECK-NEXT: [[TAN:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP1:%.*]] = fdiv fast double 1.000000e+00, [[TAN]] | ||
; CHECK-NEXT: ret double [[TMP1]] | ||
; | ||
%1 = call double @llvm.cos.f64(double %a) | ||
%2 = call double @llvm.sin.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_fast_cos_fast_sin_strict(double %a) { | ||
; CHECK-LABEL: @fdiv_fast_cos_fast_sin_strict( | ||
; CHECK-NEXT: [[TAN:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP1:%.*]] = fdiv fast double 1.000000e+00, [[TAN]] | ||
; CHECK-NEXT: ret double [[TMP1]] | ||
; | ||
%1 = call fast double @llvm.cos.f64(double %a) | ||
%2 = call double @llvm.sin.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_cos_sin_fast_multiple_uses(double %a) { | ||
; CHECK-LABEL: @fdiv_cos_sin_fast_multiple_uses( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call fast double @llvm.cos.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.sin.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv fast double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: call void @use(double [[TMP2]]) | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call fast double @llvm.cos.f64(double %a) | ||
%2 = call fast double @llvm.sin.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
call void @use(double %2) | ||
ret double %div | ||
} | ||
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define double @fdiv_cos_sin_fast(double %a) { | ||
; CHECK-LABEL: @fdiv_cos_sin_fast( | ||
; CHECK-NEXT: [[TAN:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP1:%.*]] = fdiv fast double 1.000000e+00, [[TAN]] | ||
; CHECK-NEXT: ret double [[TMP1]] | ||
; | ||
%1 = call fast double @llvm.cos.f64(double %a) | ||
%2 = call fast double @llvm.sin.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define float @fdiv_cosf_sinf_fast(float %a) { | ||
; CHECK-LABEL: @fdiv_cosf_sinf_fast( | ||
; CHECK-NEXT: [[TANF:%.*]] = call fast float @tanf(float [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP1:%.*]] = fdiv fast float 1.000000e+00, [[TANF]] | ||
; CHECK-NEXT: ret float [[TMP1]] | ||
; | ||
%1 = call fast float @llvm.cos.f32(float %a) | ||
%2 = call fast float @llvm.sin.f32(float %a) | ||
%div = fdiv fast float %1, %2 | ||
ret float %div | ||
} | ||
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define fp128 @fdiv_cosfp128_sinfp128_fast(fp128 %a) { | ||
; CHECK-LABEL: @fdiv_cosfp128_sinfp128_fast( | ||
; CHECK-NEXT: [[TANL:%.*]] = call fast fp128 @tanl(fp128 [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP1:%.*]] = fdiv fast fp128 0xL00000000000000003FFF000000000000, [[TANL]] | ||
; CHECK-NEXT: ret fp128 [[TMP1]] | ||
; | ||
%1 = call fast fp128 @llvm.cos.fp128(fp128 %a) | ||
%2 = call fast fp128 @llvm.sin.fp128(fp128 %a) | ||
%div = fdiv fast fp128 %1, %2 | ||
ret fp128 %div | ||
} | ||
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declare double @llvm.cos.f64(double) | ||
declare float @llvm.cos.f32(float) | ||
declare fp128 @llvm.cos.fp128(fp128) | ||
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declare double @llvm.sin.f64(double) | ||
declare float @llvm.sin.f32(float) | ||
declare fp128 @llvm.sin.fp128(fp128) | ||
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declare void @use(double) |
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -S -instcombine < %s | FileCheck %s | ||
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define double @fdiv_sin_cos(double %a) { | ||
; CHECK-LABEL: @fdiv_sin_cos( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.sin.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call double @llvm.cos.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call double @llvm.sin.f64(double %a) | ||
%2 = call double @llvm.cos.f64(double %a) | ||
%div = fdiv double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_strict_sin_strict_cos_fast(double %a) { | ||
; CHECK-LABEL: @fdiv_strict_sin_strict_cos_fast( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.sin.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.cos.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call double @llvm.sin.f64(double %a) | ||
%2 = call fast double @llvm.cos.f64(double %a) | ||
%div = fdiv double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_fast_sin_strict_cos_strict(double %a) { | ||
; CHECK-LABEL: @fdiv_fast_sin_strict_cos_strict( | ||
; CHECK-NEXT: [[TAN:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: ret double [[TAN]] | ||
; | ||
%1 = call double @llvm.sin.f64(double %a) | ||
%2 = call double @llvm.cos.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_fast_sin_fast_cos_strict(double %a) { | ||
; CHECK-LABEL: @fdiv_fast_sin_fast_cos_strict( | ||
; CHECK-NEXT: [[TAN:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: ret double [[TAN]] | ||
; | ||
%1 = call fast double @llvm.sin.f64(double %a) | ||
%2 = call double @llvm.cos.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define double @fdiv_sin_cos_fast_multiple_uses(double %a) { | ||
; CHECK-LABEL: @fdiv_sin_cos_fast_multiple_uses( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call fast double @llvm.sin.f64(double [[A:%.*]]) | ||
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.cos.f64(double [[A]]) | ||
; CHECK-NEXT: [[DIV:%.*]] = fdiv fast double [[TMP1]], [[TMP2]] | ||
; CHECK-NEXT: call void @use(double [[TMP2]]) | ||
; CHECK-NEXT: ret double [[DIV]] | ||
; | ||
%1 = call fast double @llvm.sin.f64(double %a) | ||
%2 = call fast double @llvm.cos.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
call void @use(double %2) | ||
ret double %div | ||
} | ||
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define double @fdiv_sin_cos_fast(double %a) { | ||
; CHECK-LABEL: @fdiv_sin_cos_fast( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call fast double @tan(double [[A:%.*]]) | ||
; CHECK-NEXT: ret double [[TMP1]] | ||
; | ||
%1 = call fast double @llvm.sin.f64(double %a) | ||
%2 = call fast double @llvm.cos.f64(double %a) | ||
%div = fdiv fast double %1, %2 | ||
ret double %div | ||
} | ||
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define float @fdiv_sinf_cosf_fast(float %a) { | ||
; CHECK-LABEL: @fdiv_sinf_cosf_fast( | ||
; CHECK-NEXT: [[TMP1:%.*]] = call fast float @tanf(float [[A:%.*]]) | ||
; CHECK-NEXT: ret float [[TMP1]] | ||
; | ||
%1 = call fast float @llvm.sin.f32(float %a) | ||
%2 = call fast float @llvm.cos.f32(float %a) | ||
%div = fdiv fast float %1, %2 | ||
ret float %div | ||
} | ||
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define fp128 @fdiv_sinfp128_cosfp128_fast(fp128 %a) { | ||
; CHECK-LABEL: @fdiv_sinfp128_cosfp128_fast( | ||
; CHECK-NEXT: [[TMP0:%.*]] = call fast fp128 @tanl(fp128 [[A:%.*]]) | ||
; CHECK-NEXT: ret fp128 [[TMP0]] | ||
; | ||
%1 = call fast fp128 @llvm.sin.fp128(fp128 %a) | ||
%2 = call fast fp128 @llvm.cos.fp128(fp128 %a) | ||
%div = fdiv fast fp128 %1, %2 | ||
ret fp128 %div | ||
} | ||
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declare double @llvm.sin.f64(double) | ||
declare float @llvm.sin.f32(float) | ||
declare fp128 @llvm.sin.fp128(fp128) | ||
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declare double @llvm.cos.f64(double) | ||
declare float @llvm.cos.f32(float) | ||
declare fp128 @llvm.cos.fp128(fp128) | ||
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declare void @use(double) |