test/Transforms/InstCombine/select-2.ll

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

; Make sure instcombine don't fold select into operands. We don't want to emit
; select of two integers unless it's selecting 0 / 1.

define i32 @t1(i32 %c, i32 %x) {
; CHECK-LABEL: @t1(
; CHECK-NEXT:    [[T1:%.*]] = icmp eq i32 [[C:%.*]], 0
; CHECK-NEXT:    [[T2:%.*]] = lshr i32 [[X:%.*]], 18
; CHECK-NEXT:    [[T3:%.*]] = select i1 [[T1]], i32 [[T2]], i32 [[X]]
; CHECK-NEXT:    ret i32 [[T3]]
;
  %t1 = icmp eq i32 %c, 0
  %t2 = lshr i32 %x, 18
  %t3 = select i1 %t1, i32 %t2, i32 %x
  ret i32 %t3
}

define i32 @t2(i32 %c, i32 %x) {
; CHECK-LABEL: @t2(
; CHECK-NEXT:    [[T1:%.*]] = icmp eq i32 [[C:%.*]], 0
; CHECK-NEXT:    [[T2:%.*]] = and i32 [[X:%.*]], 18
; CHECK-NEXT:    [[T3:%.*]] = select i1 [[T1]], i32 [[T2]], i32 [[X]]
; CHECK-NEXT:    ret i32 [[T3]]
;
  %t1 = icmp eq i32 %c, 0
  %t2 = and i32 %x, 18
  %t3 = select i1 %t1, i32 %t2, i32 %x
  ret i32 %t3
}

define float @t3(float %x, float %y) {
; CHECK-LABEL: @t3(
; CHECK-NEXT:    [[T1:%.*]] = fcmp ogt float [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[X_OP:%.*]] = fadd fast float [[X]], 1.000000e+00
; CHECK-NEXT:    [[T3:%.*]] = select i1 [[T1]], float [[X_OP]], float 2.000000e+00
; CHECK-NEXT:    ret float [[T3]]
;
  %t1 = fcmp ogt float %x, %y
  %t2 = select i1 %t1, float %x, float 1.0
  %t3 = fadd fast float %t2, 1.0
  ret float %t3
}

define i8 @ashr_exact_poison_constant_fold(i1 %b, i8 %x) {
; CHECK-LABEL: @ashr_exact_poison_constant_fold(
; CHECK-NEXT:    [[X_OP:%.*]] = ashr exact i8 [[X:%.*]], 3
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 [[X_OP]], i8 5
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 %x, i8 42
  %r = ashr exact i8 %s, 3
  ret i8 %r
}

define i8 @ashr_exact(i1 %b, i8 %x) {
; CHECK-LABEL: @ashr_exact(
; CHECK-NEXT:    [[X_OP:%.*]] = ashr exact i8 [[X:%.*]], 3
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 [[X_OP]], i8 2
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 %x, i8 16
  %r = ashr exact i8 %s, 3
  ret i8 %r
}

define i8 @shl_nsw_nuw_poison_constant_fold(i1 %b, i8 %x) {
; CHECK-LABEL: @shl_nsw_nuw_poison_constant_fold(
; CHECK-NEXT:    [[X_OP:%.*]] = shl nuw nsw i8 16, [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 -128, i8 [[X_OP]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 3, i8 %x
  %r = shl nsw nuw i8 16, %s
  ret i8 %r
}

define i8 @shl_nsw_nuw(i1 %b, i8 %x) {
; CHECK-LABEL: @shl_nsw_nuw(
; CHECK-NEXT:    [[X_OP:%.*]] = shl nuw nsw i8 7, [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 56, i8 [[X_OP]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 3, i8 %x
  %r = shl nsw nuw i8 7, %s
  ret i8 %r
}

define i8 @add_nsw_poison_constant_fold(i1 %b, i8 %x) {
; CHECK-LABEL: @add_nsw_poison_constant_fold(
; CHECK-NEXT:    [[X_OP:%.*]] = add nsw i8 [[X:%.*]], 64
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 [[X_OP]], i8 -127
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 %x, i8 65
  %r = add nsw i8 %s, 64
  ret i8 %r
}

define i8 @add_nsw(i1 %b, i8 %x) {
; CHECK-LABEL: @add_nsw(
; CHECK-NEXT:    [[X_OP:%.*]] = add nsw i8 [[X:%.*]], 64
; CHECK-NEXT:    [[R:%.*]] = select i1 [[B:%.*]], i8 [[X_OP]], i8 71
; CHECK-NEXT:    ret i8 [[R]]
;
  %s = select i1 %b, i8 %x, i8 7
  %r = add nsw i8 %s, 64
  ret i8 %r
}