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[InstSimplify] add tests for select+fcmp; NFC

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These are translated from InstCombine's test file with the same name.
We should move the transform from InstCombine to InstSimplify.

llvm-svn: 346168
This commit is contained in:
Sanjay Patel 2018-11-05 21:42:01 +00:00
parent e24244a93d
commit 9440f65af8
1 changed files with 102 additions and 0 deletions
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102
test/Transforms/InstSimplify/fcmp-select.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; X == 42.0 ? X : 42.0 --> 42.0
define double @oeq(double %x) {
; CHECK-LABEL: @oeq(
; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double 4.200000e+01
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp oeq double %x, 42.0
%cond = select i1 %cmp, double %x, double 42.0
ret double %cond
}
; X == 42.0 ? 42.0 : X --> X
define float @oeq_swapped(float %x) {
; CHECK-LABEL: @oeq_swapped(
; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], float 4.200000e+01, float [[X]]
; CHECK-NEXT: ret float [[COND]]
;
%cmp = fcmp oeq float %x, 42.0
%cond = select i1 %cmp, float 42.0, float %x
ret float %cond
}
; x != y ? x : y -> x if it's the right kind of != and at least
; one of x and y is not negative zero.
; X != 42.0 ? X : 42.0 --> X
define double @une(double %x) {
; CHECK-LABEL: @une(
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double 4.200000e+01
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp une double %x, 42.0
%cond = select i1 %cmp, double %x, double 42.0
ret double %cond
}
; X != 42.0 ? 42.0 : X --> 42.0
define double @une_swapped(double %x) {
; CHECK-LABEL: @une_swapped(
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double 4.200000e+01, double [[X]]
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp une double %x, 42.0
%cond = select i1 %cmp, double 42.0, double %x
ret double %cond
}
define double @une_could_be_negzero(double %x, double %y) {
; CHECK-LABEL: @une_could_be_negzero(
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double [[Y]]
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp une double %x, %y
%cond = select i1 %cmp, double %x, double %y
ret double %cond
}
define double @une_swapped_could_be_negzero(double %x, double %y) {
; CHECK-LABEL: @une_swapped_could_be_negzero(
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[Y]], double [[X]]
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp une double %x, %y
%cond = select i1 %cmp, double %y, double %x
ret double %cond
}
define double @one(double %x) {
; CHECK-LABEL: @one(
; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+00
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double -1.000000e+00
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp one double %x, -1.0
%cond = select i1 %cmp, double %x, double -1.0
ret double %cond
}
define double @one_swapped(double %x) {
; CHECK-LABEL: @one_swapped(
; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+00
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double -1.000000e+00, double [[X]]
; CHECK-NEXT: ret double [[COND]]
;
%cmp = fcmp one double %x, -1.0
%cond = select i1 %cmp, double -1.0, double %x
ret double %cond
}