test/Transforms/InstCombine/unordered-fcmp-select.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

define float @select_max_ugt(float %a, float %b) {
; CHECK-LABEL: @select_max_ugt(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp arcp ole float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select arcp i1 [[CMP_INV]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp arcp ugt float %a, %b
  %sel = select arcp i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_max_uge(float %a, float %b) {
; CHECK-LABEL: @select_max_uge(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp nnan olt float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select nnan ninf i1 [[CMP_INV]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp nnan uge float %a, %b
  %sel = select ninf i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_min_ugt(float %a, float %b) {
; CHECK-LABEL: @select_min_ugt(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp fast ole float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select reassoc nnan ninf i1 [[CMP_INV]], float [[A]], float [[B]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp fast ugt float %a, %b
  %sel = select reassoc i1 %cmp, float %b, float %a
  ret float %sel
}

define float @select_min_uge(float %a, float %b) {
; CHECK-LABEL: @select_min_uge(
; CHECK-NEXT:    [[SEL:%.*]] = call reassoc nsz arcp contract afn float @llvm.minnum.f32(float [[A:%.*]], float [[B:%.*]])
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp nsz uge float %a, %b
  %sel = select fast i1 %cmp, float %b, float %a
  ret float %sel
}

define float @select_max_ult(float %a, float %b) {
; CHECK-LABEL: @select_max_ult(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp arcp oge float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select nnan ninf i1 [[CMP_INV]], float [[A]], float [[B]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp arcp ult float %a, %b
  %sel = select ninf nnan i1 %cmp, float %b, float %a
  ret float %sel
}

define float @select_max_ule(float %a, float %b) {
; CHECK-LABEL: @select_max_ule(
; CHECK-NEXT:    [[SEL:%.*]] = call nnan ninf nsz float @llvm.maxnum.f32(float [[A:%.*]], float [[B:%.*]])
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp fast ule float %a, %b
  %sel = select nsz i1 %cmp, float %b, float %a
  ret float %sel
}

define float @select_min_ult(float %a, float %b) {
; CHECK-LABEL: @select_min_ult(
; CHECK-NEXT:    [[SEL:%.*]] = call reassoc nsz arcp contract afn float @llvm.minnum.f32(float [[A:%.*]], float [[B:%.*]])
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp nsz ult float %a, %b
  %sel = select fast i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_min_ule(float %a, float %b) {
; CHECK-LABEL: @select_min_ule(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp arcp ogt float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select ninf i1 [[CMP_INV]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp arcp ule float %a, %b
  %sel = select ninf i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_fcmp_une(float %a, float %b) {
; CHECK-LABEL: @select_fcmp_une(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp reassoc oeq float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select nnan i1 [[CMP_INV]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp reassoc une float %a, %b
  %sel = select nnan i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_fcmp_ueq(float %a, float %b) {
; CHECK-LABEL: @select_fcmp_ueq(
; CHECK-NEXT:    [[CMP_INV:%.*]] = fcmp reassoc one float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select nnan arcp i1 [[CMP_INV]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp reassoc ueq float %a, %b
  %sel = select arcp nnan i1 %cmp, float %a, float %b
  ret float %sel
}

declare void @foo(i1)

define float @select_max_ugt_2_use_cmp(float %a, float %b) {
; CHECK-LABEL: @select_max_ugt_2_use_cmp(
; CHECK-NEXT:    [[CMP:%.*]] = fcmp reassoc ugt float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    call void @foo(i1 [[CMP]])
; CHECK-NEXT:    [[SEL:%.*]] = call reassoc nsz arcp contract afn float @llvm.maxnum.f32(float [[A]], float [[B]])
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp reassoc ugt float %a, %b
  call void @foo(i1 %cmp)
  %sel = select fast i1 %cmp, float %a, float %b
  ret float %sel
}

define float @select_min_uge_2_use_cmp(float %a, float %b) {
; CHECK-LABEL: @select_min_uge_2_use_cmp(
; CHECK-NEXT:    [[CMP:%.*]] = fcmp ninf uge float [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    call void @foo(i1 [[CMP]])
; CHECK-NEXT:    [[SEL:%.*]] = select nsz i1 [[CMP]], float [[B]], float [[A]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp ninf uge float %a, %b
  call void @foo(i1 %cmp)
  %sel = select nsz i1 %cmp, float %b, float %a
  ret float %sel
}

; Make sure that we do not recognize the following pattern as a SPF
; unless the nsz flag is set on the select instruction.

define float @pr141017(float %x) {
; CHECK-LABEL: @pr141017(
; CHECK-NEXT:    [[CMP:%.*]] = fcmp nsz olt float [[X:%.*]], 0.000000e+00
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[CMP]], float -0.000000e+00, float [[X]]
; CHECK-NEXT:    ret float [[SEL]]
;
  %cmp = fcmp nsz olt float %x, 0.0
  %sel = select i1 %cmp, float -0.0, float %x
  ret float %sel
}

define float @pr141017_select_nsz(float %x) {
; CHECK-LABEL: @pr141017_select_nsz(
; CHECK-NEXT:    [[DOTINV:%.*]] = fcmp ole float [[X:%.*]], 0.000000e+00
; CHECK-NEXT:    [[SEL1:%.*]] = select i1 [[DOTINV]], float -0.000000e+00, float [[X]]
; CHECK-NEXT:    ret float [[SEL1]]
;
  %cmp = fcmp olt float %x, 0.0
  %sel = select nsz i1 %cmp, float -0.0, float %x
  ret float %sel
}