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[InstSimplify] add tests for icmp with 'mul nuw' operand; NFC

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This commit is contained in:
Sanjay Patel 2020-08-05 12:26:56 -04:00
parent 31a4f48675
commit b11ddc51b9
1 changed files with 80 additions and 0 deletions
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80
test/Transforms/InstSimplify/icmp-constant.ll
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@ -810,3 +810,83 @@ define i1 @eq_shl_by_variable_produces_poison(i8 %x) {
ret i1 %cmp
}
define i1 @mul_nuw_urem_cmp_constant1(i8 %x) {
; CHECK-LABEL: @mul_nuw_urem_cmp_constant1(
; CHECK-NEXT: [[M:%.*]] = mul nuw i8 [[X:%.*]], 43
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], 42
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul nuw i8 %x, 43
%r = icmp eq i8 %m, 42
ret i1 %r
}
; Invert predicate and check vector type.
define <2 x i1> @mul_nuw_urem_cmp_constant2(<2 x i8> %x) {
; CHECK-LABEL: @mul_nuw_urem_cmp_constant2(
; CHECK-NEXT: [[M:%.*]] = mul nuw <2 x i8> [[X:%.*]], <i8 45, i8 45>
; CHECK-NEXT: [[R:%.*]] = icmp ne <2 x i8> [[M]], <i8 15, i8 15>
; CHECK-NEXT: ret <2 x i1> [[R]]
;
%m = mul nuw <2 x i8> %x, <i8 45, i8 45>
%r = icmp ne <2 x i8> %m, <i8 15, i8 15>
ret <2 x i1> %r
}
; Check "negative" numbers (constants should be analyzed as unsigned).
define i1 @mul_nuw_smaller_cmp_constant_vec_splat(i8 %x) {
; CHECK-LABEL: @mul_nuw_smaller_cmp_constant_vec_splat(
; CHECK-NEXT: [[M:%.*]] = mul nuw i8 [[X:%.*]], -42
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], -84
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul nuw i8 %x, -42
%r = icmp eq i8 %m, -84
ret i1 %r
}
define i1 @mul_urem_cmp_constant1(i8 %x) {
; CHECK-LABEL: @mul_urem_cmp_constant1(
; CHECK-NEXT: [[M:%.*]] = mul i8 [[X:%.*]], 43
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], 42
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul i8 %x, 43
%r = icmp eq i8 %m, 42
ret i1 %r
}
define i1 @mul_nuw_urem_cmp_constant0(i8 %x) {
; CHECK-LABEL: @mul_nuw_urem_cmp_constant0(
; CHECK-NEXT: [[M:%.*]] = mul nuw i8 [[X:%.*]], 23
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul nuw i8 %x, 23
%r = icmp eq i8 %m, 0
ret i1 %r
}
define i1 @mul_nuw_urem_cmp_constant_is_0(i8 %x) {
; CHECK-LABEL: @mul_nuw_urem_cmp_constant_is_0(
; CHECK-NEXT: [[M:%.*]] = mul nuw i8 [[X:%.*]], 42
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], 84
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul nuw i8 %x, 42
%r = icmp eq i8 %m, 84
ret i1 %r
}
define i1 @mul_nuw_urem_cmp_neg_constant_is_0(i8 %x) {
; CHECK-LABEL: @mul_nuw_urem_cmp_neg_constant_is_0(
; CHECK-NEXT: [[M:%.*]] = mul nuw i8 [[X:%.*]], 43
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], -127
; CHECK-NEXT: ret i1 [[R]]
;
%m = mul nuw i8 %x, 43
%r = icmp eq i8 %m, -127
ret i1 %r
}