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Apply transformation on OS X 10.9+ and iOS 7.0+: pow(10, x) ―> __exp10(x)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Yi Jiang
2013-12-05 22:42:50 +00:00
parent 7d3a11fd9f
commit ab906d0048
3 changed files with 55 additions and 0 deletions
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24
test/Transforms/InstCombine/pow-1.ll
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@@ -1,6 +1,10 @@
; Test that the pow library call simplifier works correctly.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.9 | FileCheck %s --check-prefix=CHECK-EXP10
; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios7.0 | FileCheck %s --check-prefix=CHECK-EXP10
; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.8 | FileCheck %s --check-prefix=CHECK-NO-EXP10
; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios6.0 | FileCheck %s --check-prefix=CHECK-NO-EXP10
; rdar://7251832
; NOTE: The readonly attribute on the pow call should be preserved
@@ -163,5 +167,25 @@ define double @test_simplify17(double %x) {
; CHECK-NEXT: ret double [[SELECT]]
}
; Check pow(10.0, x) -> __exp10(x) on OS X 10.9+ and iOS 7.0+.
define float @test_simplify18(float %x) {
; CHECK-LABEL: @test_simplify18(
%retval = call float @powf(float 10.0, float %x)
; CHECK-EXP10: [[EXP10F:%[_a-z0-9]+]] = call float @__exp10f(float %x) [[NUW_RO:#[0-9]+]]
ret float %retval
; CHECK-EXP10: ret float [[EXP10F]]
; CHECK-NO-EXP10: call float @powf
}
define double @test_simplify19(double %x) {
; CHECK-LABEL: @test_simplify19(
%retval = call double @pow(double 10.0, double %x)
; CHECK-EXP10: [[EXP10:%[_a-z0-9]+]] = call double @__exp10(double %x) [[NUW_RO]]
ret double %retval
; CHECK-EXP10: ret double [[EXP10]]
; CHECK-NO-EXP10: call double @pow
}
; CHECK: attributes [[NUW_RO]] = { nounwind readonly }