test/Transforms/InstCombine/icmp-binop.ll

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

declare void @use64(i64)
declare void @llvm.assume(i1)

define i1 @mul_unkV_oddC_eq(i32 %v) {
; CHECK-LABEL: @mul_unkV_oddC_eq(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[V:%.*]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %mul = mul i32 %v, 3
  %cmp = icmp eq i32 %mul, 0
  ret i1 %cmp
}

define i1 @mul_unkV_oddC_eq_nonzero(i32 %v) {
; CHECK-LABEL: @mul_unkV_oddC_eq_nonzero(
; CHECK-NEXT:    [[MUL:%.*]] = mul i32 [[V:%.*]], 3
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[MUL]], 4
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %mul = mul i32 %v, 3
  %cmp = icmp eq i32 %mul, 4
  ret i1 %cmp
}

define <2 x i1> @mul_unkV_oddC_ne_vec(<2 x i64> %v) {
; CHECK-LABEL: @mul_unkV_oddC_ne_vec(
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne <2 x i64> [[V:%.*]], zeroinitializer
; CHECK-NEXT:    ret <2 x i1> [[CMP]]
;
  %mul = mul <2 x i64> %v, <i64 3, i64 3>
  %cmp = icmp ne <2 x i64> %mul, <i64 0, i64 0>
  ret <2 x i1> %cmp
}

define i1 @mul_assumeoddV_asumeoddV_eq(i16 %v, i16 %v2) {
; CHECK-LABEL: @mul_assumeoddV_asumeoddV_eq(
; CHECK-NEXT:    [[LB:%.*]] = and i16 [[V:%.*]], 1
; CHECK-NEXT:    [[ODD:%.*]] = icmp ne i16 [[LB]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[ODD]])
; CHECK-NEXT:    [[LB2:%.*]] = and i16 [[V2:%.*]], 1
; CHECK-NEXT:    [[ODD2:%.*]] = icmp ne i16 [[LB2]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[ODD2]])
; CHECK-NEXT:    ret i1 true
;
  %lb = and i16 %v, 1
  %odd = icmp ne i16 %lb, 0
  call void @llvm.assume(i1 %odd)
  %lb2 = and i16 %v2, 1
  %odd2 = icmp ne i16 %lb2, 0
  call void @llvm.assume(i1 %odd2)
  %mul = mul i16 %v, %v2
  %cmp = icmp ne i16 %mul, 0
  ret i1 %cmp
}

define i1 @mul_unkV_oddC_sge(i8 %v) {
; CHECK-LABEL: @mul_unkV_oddC_sge(
; CHECK-NEXT:    [[MUL:%.*]] = mul i8 [[V:%.*]], 3
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i8 [[MUL]], -1
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %mul = mul i8 %v, 3
  %cmp = icmp sge i8 %mul, 0
  ret i1 %cmp
}

define i1 @mul_reused_unkV_oddC_ne(i64 %v) {
; CHECK-LABEL: @mul_reused_unkV_oddC_ne(
; CHECK-NEXT:    [[MUL:%.*]] = mul i64 [[V:%.*]], 3
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i64 [[V]], 0
; CHECK-NEXT:    call void @use64(i64 [[MUL]])
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %mul = mul i64 %v, 3
  %cmp = icmp ne i64 %mul, 0
  call void @use64(i64 %mul)
  ret i1 %cmp
}

define i1 @mul_assumeoddV_unkV_eq(i16 %v, i16 %v2) {
; CHECK-LABEL: @mul_assumeoddV_unkV_eq(
; CHECK-NEXT:    [[LB:%.*]] = and i16 [[V2:%.*]], 1
; CHECK-NEXT:    [[ODD:%.*]] = icmp ne i16 [[LB]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[ODD]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i16 [[V:%.*]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %lb = and i16 %v2, 1
  %odd = icmp eq i16 %lb, 1
  call void @llvm.assume(i1 %odd)
  %mul = mul i16 %v, %v2
  %cmp = icmp eq i16 %mul, 0
  ret i1 %cmp
}

define i1 @mul_reusedassumeoddV_unkV_ne(i64 %v, i64 %v2) {
; CHECK-LABEL: @mul_reusedassumeoddV_unkV_ne(
; CHECK-NEXT:    [[LB:%.*]] = and i64 [[V:%.*]], 1
; CHECK-NEXT:    [[ODD:%.*]] = icmp ne i64 [[LB]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[ODD]])
; CHECK-NEXT:    [[MUL:%.*]] = mul i64 [[V]], [[V2:%.*]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i64 [[V2]], 0
; CHECK-NEXT:    call void @use64(i64 [[MUL]])
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %lb = and i64 %v, 1
  %odd = icmp ne i64 %lb, 0
  call void @llvm.assume(i1 %odd)
  %mul = mul i64 %v, %v2
  %cmp = icmp ne i64 %mul, 0
  call void @use64(i64 %mul)
  ret i1 %cmp
}

define <2 x i1> @mul_setoddV_unkV_ne(<2 x i32> %v1, <2 x i32> %v2) {
; CHECK-LABEL: @mul_setoddV_unkV_ne(
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne <2 x i32> [[V2:%.*]], zeroinitializer
; CHECK-NEXT:    ret <2 x i1> [[CMP]]
;
  %v = or <2 x i32> %v1, <i32 1, i32 1>
  %mul = mul <2 x i32> %v, %v2
  %cmp = icmp ne <2 x i32> %mul, <i32 0, i32 0>
  ret <2 x i1> %cmp
}

define i1 @mul_broddV_unkV_eq(i16 %v, i16 %v2) {
; CHECK-LABEL: @mul_broddV_unkV_eq(
; CHECK-NEXT:    [[LB:%.*]] = and i16 [[V2:%.*]], 1
; CHECK-NEXT:    [[ODD_NOT:%.*]] = icmp eq i16 [[LB]], 0
; CHECK-NEXT:    br i1 [[ODD_NOT]], label [[FALSE:%.*]], label [[TRUE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    [[MUL:%.*]] = mul i16 [[V:%.*]], [[V2]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i16 [[MUL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
; CHECK:       false:
; CHECK-NEXT:    call void @use64(i16 [[V]])
; CHECK-NEXT:    ret i1 false
;
  %lb = and i16 %v2, 1
  %odd = icmp eq i16 %lb, 1
  br i1 %odd, label %true, label %false
true:
  %mul = mul i16 %v, %v2
  %cmp = icmp eq i16 %mul, 0
  ret i1 %cmp
false:
  call void @use64(i16 %v)
  ret i1 false
}

define i1 @mul_unkV_evenC_ne(i64 %v) {
; CHECK-LABEL: @mul_unkV_evenC_ne(
; CHECK-NEXT:    [[MUL_MASK:%.*]] = and i64 [[V:%.*]], 4611686018427387903
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i64 [[MUL_MASK]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %mul = mul i64 %v, 4
  %cmp = icmp ne i64 %mul, 0
  ret i1 %cmp
}

define i1 @mul_assumenzV_asumenzV_eq(i64 %v, i64 %v2) {
; CHECK-LABEL: @mul_assumenzV_asumenzV_eq(
; CHECK-NEXT:    [[NZ:%.*]] = icmp ne i64 [[V:%.*]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[NZ]])
; CHECK-NEXT:    [[NZ2:%.*]] = icmp ne i64 [[V2:%.*]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[NZ2]])
; CHECK-NEXT:    [[MUL:%.*]] = mul i64 [[V]], [[V2]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i64 [[MUL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %nz = icmp ne i64 %v, 0
  call void @llvm.assume(i1 %nz)
  %nz2 = icmp ne i64 %v2, 0
  call void @llvm.assume(i1 %nz2)
  %mul = mul i64 %v, %v2
  %cmp = icmp eq i64 %mul, 0
  ret i1 %cmp
}

define i1 @mul_assumenzV_unkV_nsw_ne(i32 %v, i32 %v2) {
; CHECK-LABEL: @mul_assumenzV_unkV_nsw_ne(
; CHECK-NEXT:    [[NZ:%.*]] = icmp ne i32 [[V:%.*]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[NZ]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[V2:%.*]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %nz = icmp ne i32 %v, 0
  call void @llvm.assume(i1 %nz)
  %mul = mul nsw i32 %v, %v2
  %cmp = icmp ne i32 %mul, 0
  ret i1 %cmp
}

define i1 @mul_selectnzV_unkV_nsw_ne(i8 %v, i8 %v2) {
; CHECK-LABEL: @mul_selectnzV_unkV_nsw_ne(
; CHECK-NEXT:    [[NZ:%.*]] = icmp ne i8 [[V:%.*]], 0
; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i8 [[V]], [[V2:%.*]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i8 [[MUL]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[NZ]], i1 [[CMP]], i1 false
; CHECK-NEXT:    ret i1 [[R]]
;
  %nz = icmp ne i8 %v, 0
  %mul = mul nsw i8 %v, %v2
  %cmp = icmp ne i8 %mul, 0
  %r = select i1 %nz, i1 %cmp, i1 false
  ret i1 %r
}

define <2 x i1> @mul_unkV_unkV_nsw_nuw_ne(<2 x i16> %v, <2 x i16> %v2) {
; CHECK-LABEL: @mul_unkV_unkV_nsw_nuw_ne(
; CHECK-NEXT:    [[MUL:%.*]] = mul nuw nsw <2 x i16> [[V:%.*]], [[V2:%.*]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne <2 x i16> [[MUL]], zeroinitializer
; CHECK-NEXT:    ret <2 x i1> [[CMP]]
;
  %mul = mul nuw nsw <2 x i16> %v, %v2
  %cmp = icmp ne <2 x i16> %mul, <i16 0, i16 0>
  ret <2 x i1> %cmp
}

define i1 @mul_setnzV_unkV_nuw_eq(i8 %v1, i8 %v2) {
; CHECK-LABEL: @mul_setnzV_unkV_nuw_eq(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i8 [[V2:%.*]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %v = or i8 %v1, 2
  %mul = mul nuw i8 %v, %v2
  %cmp = icmp eq i8 %mul, 0
  ret i1 %cmp
}

define i1 @mul_brnzV_unkV_nuw_eq(i64 %v, i64 %v2) {
; CHECK-LABEL: @mul_brnzV_unkV_nuw_eq(
; CHECK-NEXT:    [[NZ_NOT:%.*]] = icmp eq i64 [[V2:%.*]], 0
; CHECK-NEXT:    br i1 [[NZ_NOT]], label [[FALSE:%.*]], label [[TRUE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i64 [[V:%.*]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
; CHECK:       false:
; CHECK-NEXT:    call void @use64(i64 [[V]])
; CHECK-NEXT:    ret i1 false
;
  %nz = icmp ne i64 %v2, 0
  br i1 %nz, label %true, label %false
true:
  %mul = mul nuw i64 %v, %v2
  %cmp = icmp eq i64 %mul, 0
  ret i1 %cmp
false:
  call void @use64(i64 %v)
  ret i1 false
}