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6ea2cff39a
Summary: This change enables the sin(x) cos(x) -> sincos(x) optimization on GNU target triples. This optimization was being inhibited when -ffast-math wasn't set because sincos in GLibC does not set errno, while sin and cos do. However, this optimization will only run if the attributes on the sin/cos calls include readnone, which is how clang represents the fact that it doesn't care about the errno values set by these functions (via the -fno-math-errno flag). Reviewers: hfinkel, bogner Subscribers: mcrosier, javed.absar, llvm-commits, paul.redmond Differential Revision: https://reviews.llvm.org/D32921 llvm-svn: 305204
75 lines
1.8 KiB
LLVM
75 lines
1.8 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-apple-ios7 | FileCheck %s --check-prefix CHECK-IOS
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; RUN: llc < %s -mtriple=arm64-linux-gnu | FileCheck %s --check-prefix CHECK-LINUX
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; Combine sin / cos into a single call unless they may write errno (as
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; captured by readnone attrbiute, controlled by clang -fmath-errno
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; setting).
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; rdar://12856873
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define float @test1(float %x) nounwind {
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entry:
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; CHECK-IOS-LABEL: test1:
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; CHECK-IOS: bl ___sincosf_stret
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; CHECK-IOS: fadd s0, s0, s1
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; CHECK-LINUX-LABEL: test1:
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; CHECK-LINUX: bl sincosf
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%call = tail call float @sinf(float %x) readnone
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%call1 = tail call float @cosf(float %x) readnone
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%add = fadd float %call, %call1
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ret float %add
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}
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define float @test1_errno(float %x) nounwind {
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entry:
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; CHECK-IOS-LABEL: test1_errno:
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; CHECK-IOS: bl _sinf
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; CHECK-IOS: bl _cosf
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; CHECK-LINUX-LABEL: test1_errno:
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; CHECK-LINUX: bl sinf
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; CHECK-LINUX: bl cosf
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%call = tail call float @sinf(float %x)
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%call1 = tail call float @cosf(float %x)
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%add = fadd float %call, %call1
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ret float %add
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}
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define double @test2(double %x) nounwind {
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entry:
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; CHECK-IOS-LABEL: test2:
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; CHECK-IOS: bl ___sincos_stret
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; CHECK-IOS: fadd d0, d0, d1
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; CHECK-LINUX-LABEL: test2:
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; CHECK-LINUX: bl sincos
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%call = tail call double @sin(double %x) readnone
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%call1 = tail call double @cos(double %x) readnone
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%add = fadd double %call, %call1
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ret double %add
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}
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define double @test2_errno(double %x) nounwind {
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entry:
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; CHECK-IOS-LABEL: test2_errno:
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; CHECK-IOS: bl _sin
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; CHECK-IOS: bl _cos
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; CHECK-LINUX-LABEL: test2_errno:
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; CHECK-LINUX: bl sin
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; CHECK-LINUX: bl cos
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%call = tail call double @sin(double %x)
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%call1 = tail call double @cos(double %x)
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%add = fadd double %call, %call1
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ret double %add
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}
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declare float @sinf(float)
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declare double @sin(double)
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declare float @cosf(float)
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declare double @cos(double)
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