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c1c4330b2a
Summary: This patch enables folding following instructions under -ffast-math flag: log10(pow(10.0,x)) -> x, log2(pow(2.0,x)) -> x Reviewers: hfinkel, spatel, efriedma, craig.topper, zvi, majnemer, lebedev.ri Reviewed By: spatel, lebedev.ri Subscribers: lebedev.ri, llvm-commits Differential Revision: https://reviews.llvm.org/D41940 llvm-svn: 352981
46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instsimplify < %s | FileCheck %s
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declare double @llvm.log10.f64(double)
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declare double @llvm.pow.f64(double, double)
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define double @log10_pow10(double %x) {
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; CHECK-LABEL: @log10_pow10(
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; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.pow.f64(double 1.000000e+01, double [[X:%.*]])
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; CHECK-NEXT: [[TMP2:%.*]] = call double @llvm.log10.f64(double [[TMP1]])
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; CHECK-NEXT: ret double [[TMP2]]
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;
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%tmp = call double @llvm.pow.f64(double 1.000000e+01, double %x)
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%tmp1 = call double @llvm.log10.f64(double %tmp)
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ret double %tmp1
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}
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define double @log10_strict_pow10_reassoc(double %x) {
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; CHECK-LABEL: @log10_strict_pow10_reassoc(
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; CHECK-NEXT: [[TMP1:%.*]] = call reassoc double @llvm.pow.f64(double 1.000000e+01, double [[X:%.*]])
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; CHECK-NEXT: [[TMP2:%.*]] = call double @llvm.log10.f64(double [[TMP1]])
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; CHECK-NEXT: ret double [[TMP2]]
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;
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%tmp = call reassoc double @llvm.pow.f64(double 1.000000e+01, double %x)
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%tmp1 = call double @llvm.log10.f64(double %tmp)
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ret double %tmp1
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}
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define double @log10_reassoc_pow10_strict(double %x) {
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; CHECK-LABEL: @log10_reassoc_pow10_strict(
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; CHECK-NEXT: ret double [[X:%.*]]
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;
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%tmp = call double @llvm.pow.f64(double 1.000000e+01, double %x)
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%tmp1 = call reassoc double @llvm.log10.f64(double %tmp)
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ret double %tmp1
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}
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define double @log10_pow10_reassoc(double %x) {
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; CHECK-LABEL: @log10_pow10_reassoc(
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; CHECK-NEXT: ret double [[X:%.*]]
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;
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%tmp = call reassoc double @llvm.pow.f64(double 1.000000e+01, double %x)
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%tmp1 = call reassoc double @llvm.log10.f64(double %tmp)
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ret double %tmp1
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}
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