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[NFC] Added tests for x/fabs(X) fold 

llvm-svn: 368200
This commit is contained in:
David Bolvansky 2019-08-07 19:35:25 +00:00
parent 8883ec7da2
commit f8183d64de
1 changed files with 75 additions and 0 deletions
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llvm/test/Transforms/InstCombine/fabs-copysign.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
declare double @llvm.fabs.f64(double)
declare float @llvm.fabs.f32(float)
declare void @use(double)
declare double @llvm.copysign.f64(double, double)
declare float @llvm.copysign.f32(float, float)
define double @fabs_copysign(double %x) {
; CHECK-LABEL: @fabs_copysign(
; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf double @llvm.copysign.f64(double 1.000000e+00, double [[X:%.*]])
; CHECK-NEXT: ret double [[TMP1]]
;
%f = tail call double @llvm.fabs.f64(double %x)
%div = fdiv nnan ninf double %x, %f
ret double %div
}
define float @fabs_copysignf(float %x) {
; CHECK-LABEL: @fabs_copysignf(
; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf float @llvm.copysign.f32(float 1.000000e+00, float [[X:%.*]])
; CHECK-NEXT: ret float [[TMP1]]
;
%f = tail call float @llvm.fabs.f32(float %x)
%div = fdiv nnan ninf float %x, %f
ret float %div
}
define double @fabs_copysign_use(double %x) {
; CHECK-LABEL: @fabs_copysign_use(
; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf double @llvm.copysign.f64(double 1.000000e+00, double [[X:%.*]])
; CHECK-NEXT: ret double [[TMP1]]
;
%f = tail call double @llvm.fabs.f64(double %x)
%div = fdiv nnan ninf double %x, %f
ret double %div
}
; Negative tests
define double @fabs_copysign_mismatch(double %x, double %y) {
; CHECK-LABEL: @fabs_copysign_mismatch(
; CHECK-NEXT: [[F:%.*]] = tail call double @llvm.fabs.f64(double [[Y:%.*]])
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X:%.*]], [[F]]
; CHECK-NEXT: ret double [[DIV]]
;
%f = tail call double @llvm.fabs.f64(double %y)
%div = fdiv double %x, %f
ret double %div
}
define double @fabs_copysign_no_nnan(double %x) {
; CHECK-LABEL: @fabs_copysign_no_nnan(
; CHECK-NEXT: [[F:%.*]] = tail call double @llvm.fabs.f64(double [[X:%.*]])
; CHECK-NEXT: [[DIV:%.*]] = fdiv ninf double [[X]], [[F]]
; CHECK-NEXT: ret double [[DIV]]
;
%f = tail call double @llvm.fabs.f64(double %x)
%div = fdiv ninf double %x, %f
ret double %div
}
define double @fabs_copysign_no_ninf(double %x) {
; CHECK-LABEL: @fabs_copysign_no_ninf(
; CHECK-NEXT: [[F:%.*]] = tail call double @llvm.fabs.f64(double [[X:%.*]])
; CHECK-NEXT: [[DIV:%.*]] = fdiv nnan double [[X]], [[F]]
; CHECK-NEXT: ret double [[DIV]]
;
%f = tail call double @llvm.fabs.f64(double %x)
%div = fdiv nnan double %x, %f
ret double %div
}