test/Transforms/InstCombine/select-safe-bool-transforms.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine-unsafe-select-transform=0 -instcombine -S | FileCheck %s

; TODO: All of these should be optimized to a single instruction of select/
; and/or.

; 1. --- X /\ (X /\ Y) ---

define i1 @merge_logical_and_and(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_and_and(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %X, i1 %Y, i1 false
  %res = and i1 %X, %c
  ret i1 %res
}

define i1 @merge_two_logical_ands(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ands(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %X, i1 %Y, i1 false
  %res = select i1 %X, i1 %c, i1 false
  ret i1 %res
}

define i1 @merge_and_logical_and(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_and_logical_and(
; CHECK-NEXT:    [[C:%.*]] = and i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X]], i1 [[C]], i1 false
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = and i1 %X, %Y
  %res = select i1 %X, i1 %c, i1 false
  ret i1 %res
}

; 2. --- X /\ (Y /\ X) ---

; This can be optimized to 'and i1 %X, %Y'
define i1 @merge_logical_and_and2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_and_and2(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 [[X:%.*]], i1 false
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %Y, i1 %X, i1 false
  %res = and i1 %X, %c
  ret i1 %res
}

define i1 @merge_two_logical_ands2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ands2(
; CHECK-NEXT:    [[TMP1:%.*]] = and i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %c = select i1 %Y, i1 %X, i1 false
  %res = select i1 %X, i1 %c, i1 false
  ret i1 %res
}

define i1 @merge_and_logical_and2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_and_logical_and2(
; CHECK-NEXT:    [[C:%.*]] = and i1 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X]], i1 [[C]], i1 false
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = and i1 %Y, %X
  %res = select i1 %X, i1 %c, i1 false
  ret i1 %res
}

; 3. --- (X /\ Y) /\ X ---

define i1 @merge_logical_and_and3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_and_and3(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %X, i1 %Y, i1 false
  %res = and i1 %c, %X
  ret i1 %res
}

define i1 @merge_two_logical_ands3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ands3(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[C]], i1 [[X]], i1 false
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %X, i1 %Y, i1 false
  %res = select i1 %c, i1 %X, i1 false
  ret i1 %res
}

; This can be optimized to 'and i1 %X, %Y'
define i1 @merge_and_logical_and3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_and_logical_and3(
; CHECK-NEXT:    [[C:%.*]] = and i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = and i1 %X, %Y
  %res = select i1 %c, i1 %X, i1 false
  ret i1 %res
}

; 4. --- (Y /\ X) /\ X ---

; This can be optimized to 'and i1 %X, %Y'
define i1 @merge_logical_and_and4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_and_and4(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 [[X:%.*]], i1 false
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %Y, i1 %X, i1 false
  %res = and i1 %c, %X
  ret i1 %res
}

define i1 @merge_two_logical_ands4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ands4(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 [[X:%.*]], i1 false
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[C]], i1 [[X]], i1 false
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %Y, i1 %X, i1 false
  %res = select i1 %c, i1 %X, i1 false
  ret i1 %res
}

; This can be optimized to 'and i1 %X, %Y'
define i1 @merge_and_logical_and4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_and_logical_and4(
; CHECK-NEXT:    [[C:%.*]] = and i1 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = and i1 %Y, %X
  %res = select i1 %c, i1 %X, i1 false
  ret i1 %res
}


; 5. --- X \/ (X \/ Y) ---

define i1 @merge_logical_or_or(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_or_or(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %X, i1 true, i1 %Y
  %res = or i1 %X, %c
  ret i1 %res
}

define i1 @merge_two_logical_ors(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ors(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %X, i1 true, i1 %Y
  %res = select i1 %X, i1 true, i1 %c
  ret i1 %res
}

define i1 @merge_or_logical_or(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_or_logical_or(
; CHECK-NEXT:    [[C:%.*]] = or i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X]], i1 true, i1 [[C]]
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = or i1 %X, %Y
  %res = select i1 %X, i1 true, i1 %c
  ret i1 %res
}

; 6. --- X \/ (Y \/ X) ---

; This can be optimized to 'or i1 %X, %Y'
define i1 @merge_logical_or_or2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_or_or2(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 true, i1 [[X:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %Y, i1 true, i1 %X
  %res = or i1 %X, %c
  ret i1 %res
}

define i1 @merge_two_logical_ors2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ors2(
; CHECK-NEXT:    [[TMP1:%.*]] = or i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %c = select i1 %Y, i1 true, i1 %X
  %res = select i1 %X, i1 true, i1 %c
  ret i1 %res
}

define i1 @merge_or_logical_or2(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_or_logical_or2(
; CHECK-NEXT:    [[C:%.*]] = or i1 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[X]], i1 true, i1 [[C]]
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = or i1 %Y, %X
  %res = select i1 %X, i1 true, i1 %c
  ret i1 %res
}

; 7. --- (X \/ Y) \/ X ---

define i1 @merge_logical_or_or3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_or_or3(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %X, i1 true, i1 %Y
  %res = or i1 %c, %X
  ret i1 %res
}

define i1 @merge_two_logical_ors3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ors3(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[C]], i1 true, i1 [[X]]
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %X, i1 true, i1 %Y
  %res = select i1 %c, i1 true, i1 %X
  ret i1 %res
}

; This can be optimized to 'or i1 %Y, %X'
define i1 @merge_or_logical_or3(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_or_logical_or3(
; CHECK-NEXT:    [[C:%.*]] = or i1 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = or i1 %X, %Y
  %res = select i1 %c, i1 true, i1 %X
  ret i1 %res
}

; 8. --- (Y \/ X) \/ X ---

; This can be optimized to 'or i1 %Y, %X'
define i1 @merge_logical_or_or4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_logical_or_or4(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 true, i1 [[X:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = select i1 %Y, i1 true, i1 %X
  %res = or i1 %c, %X
  ret i1 %res
}

define i1 @merge_two_logical_ors4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_two_logical_ors4(
; CHECK-NEXT:    [[C:%.*]] = select i1 [[Y:%.*]], i1 true, i1 [[X:%.*]]
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[C]], i1 true, i1 [[X]]
; CHECK-NEXT:    ret i1 [[RES]]
;
  %c = select i1 %Y, i1 true, i1 %X
  %res = select i1 %c, i1 true, i1 %X
  ret i1 %res
}

; This can be optimized to 'or i1 %Y, %X'
define i1 @merge_or_logical_or4(i1 %X, i1 %Y) {
; CHECK-LABEL: @merge_or_logical_or4(
; CHECK-NEXT:    [[C:%.*]] = or i1 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %c = or i1 %Y, %X
  %res = select i1 %c, i1 true, i1 %X
  ret i1 %res
}