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[InstCombine] add tests for icmp with mul nsw/nuw; NFC

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This commit is contained in:
Sanjay Patel 2020-08-05 16:26:14 -04:00
parent 9fb2aa5948
commit ecb0d3537f
1 changed files with 135 additions and 15 deletions
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150
test/Transforms/InstCombine/icmp-mul.ll
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@ -1,6 +1,8 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
declare void @use(i8)
; Tests for slt/ult
define i1 @slt_positive_multip_rem_zero(i8 %x) {
@ -117,43 +119,161 @@ define i1 @ugt_rem_nz(i8 %x) {
; Tests for eq/ne
define i1 @eq_rem_zero(i8 %x) {
; CHECK-LABEL: @eq_rem_zero(
; CHECK-NEXT: [[A:%.*]] = mul nuw i8 [[X:%.*]], 5
define i1 @eq_nsw_rem_zero(i8 %x) {
; CHECK-LABEL: @eq_nsw_rem_zero(
; CHECK-NEXT: [[A:%.*]] = mul nsw i8 [[X:%.*]], -5
; CHECK-NEXT: [[B:%.*]] = icmp eq i8 [[A]], 20
; CHECK-NEXT: ret i1 [[B]]
;
%a = mul nuw i8 %x, 5
%a = mul nsw i8 %x, -5
%b = icmp eq i8 %a, 20
ret i1 %b
}
define i1 @ne_rem_zero(i8 %x) {
; CHECK-LABEL: @ne_rem_zero(
define <2 x i1> @ne_nsw_rem_zero(<2 x i8> %x) {
; CHECK-LABEL: @ne_nsw_rem_zero(
; CHECK-NEXT: [[A:%.*]] = mul nsw <2 x i8> [[X:%.*]], <i8 5, i8 5>
; CHECK-NEXT: [[B:%.*]] = icmp ne <2 x i8> [[A]], <i8 -30, i8 -30>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nsw <2 x i8> %x, <i8 5, i8 5>
%b = icmp ne <2 x i8> %a, <i8 -30, i8 -30>
ret <2 x i1> %b
}
define <2 x i1> @ne_nsw_rem_zero_undef1(<2 x i8> %x) {
; CHECK-LABEL: @ne_nsw_rem_zero_undef1(
; CHECK-NEXT: [[A:%.*]] = mul nsw <2 x i8> [[X:%.*]], <i8 5, i8 undef>
; CHECK-NEXT: [[B:%.*]] = icmp ne <2 x i8> [[A]], <i8 -30, i8 -30>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nsw <2 x i8> %x, <i8 5, i8 undef>
%b = icmp ne <2 x i8> %a, <i8 -30, i8 -30>
ret <2 x i1> %b
}
define <2 x i1> @ne_nsw_rem_zero_undef2(<2 x i8> %x) {
; CHECK-LABEL: @ne_nsw_rem_zero_undef2(
; CHECK-NEXT: [[A:%.*]] = mul nsw <2 x i8> [[X:%.*]], <i8 5, i8 5>
; CHECK-NEXT: [[B:%.*]] = icmp ne <2 x i8> [[A]], <i8 -30, i8 undef>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nsw <2 x i8> %x, <i8 5, i8 5>
%b = icmp ne <2 x i8> %a, <i8 -30, i8 undef>
ret <2 x i1> %b
}
define i1 @eq_nsw_rem_zero_uses(i8 %x) {
; CHECK-LABEL: @eq_nsw_rem_zero_uses(
; CHECK-NEXT: [[A:%.*]] = mul nsw i8 [[X:%.*]], -5
; CHECK-NEXT: call void @use(i8 [[A]])
; CHECK-NEXT: [[B:%.*]] = icmp eq i8 [[A]], 20
; CHECK-NEXT: ret i1 [[B]]
;
%a = mul nsw i8 %x, -5
call void @use(i8 %a)
%b = icmp eq i8 %a, 20
ret i1 %b
}
; Impossible multiple should be handled by instsimplify.
define i1 @eq_nsw_rem_nz(i8 %x) {
; CHECK-LABEL: @eq_nsw_rem_nz(
; CHECK-NEXT: ret i1 false
;
%a = mul nsw i8 %x, 5
%b = icmp eq i8 %a, 245
ret i1 %b
}
; Impossible multiple should be handled by instsimplify.
define i1 @ne_nsw_rem_nz(i8 %x) {
; CHECK-LABEL: @ne_nsw_rem_nz(
; CHECK-NEXT: ret i1 true
;
%a = mul nsw i8 %x, 5
%b = icmp ne i8 %a, 130
ret i1 %b
}
define <2 x i1> @eq_nuw_rem_zero(<2 x i8> %x) {
; CHECK-LABEL: @eq_nuw_rem_zero(
; CHECK-NEXT: [[A:%.*]] = mul nuw <2 x i8> [[X:%.*]], <i8 5, i8 5>
; CHECK-NEXT: [[B:%.*]] = icmp eq <2 x i8> [[A]], <i8 20, i8 20>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nuw <2 x i8> %x, <i8 5, i8 5>
%b = icmp eq <2 x i8> %a, <i8 20, i8 20>
ret <2 x i1> %b
}
define <2 x i1> @eq_nuw_rem_zero_undef1(<2 x i8> %x) {
; CHECK-LABEL: @eq_nuw_rem_zero_undef1(
; CHECK-NEXT: [[A:%.*]] = mul nuw <2 x i8> [[X:%.*]], <i8 undef, i8 5>
; CHECK-NEXT: [[B:%.*]] = icmp eq <2 x i8> [[A]], <i8 20, i8 20>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nuw <2 x i8> %x, <i8 undef, i8 5>
%b = icmp eq <2 x i8> %a, <i8 20, i8 20>
ret <2 x i1> %b
}
define <2 x i1> @eq_nuw_rem_zero_undef2(<2 x i8> %x) {
; CHECK-LABEL: @eq_nuw_rem_zero_undef2(
; CHECK-NEXT: [[A:%.*]] = mul nuw <2 x i8> [[X:%.*]], <i8 5, i8 5>
; CHECK-NEXT: [[B:%.*]] = icmp eq <2 x i8> [[A]], <i8 undef, i8 20>
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%a = mul nuw <2 x i8> %x, <i8 5, i8 5>
%b = icmp eq <2 x i8> %a, <i8 undef, i8 20>
ret <2 x i1> %b
}
define i1 @ne_nuw_rem_zero(i8 %x) {
; CHECK-LABEL: @ne_nuw_rem_zero(
; CHECK-NEXT: [[A:%.*]] = mul nuw i8 [[X:%.*]], 5
; CHECK-NEXT: [[B:%.*]] = icmp ne i8 [[A]], 30
; CHECK-NEXT: [[B:%.*]] = icmp ne i8 [[A]], -126
; CHECK-NEXT: ret i1 [[B]]
;
%a = mul nuw i8 %x, 5
%b = icmp ne i8 %a, 30
%b = icmp ne i8 %a, 130
ret i1 %b
}
define i1 @eq_rem_nz(i8 %x) {
; CHECK-LABEL: @eq_rem_nz(
; CHECK-NEXT: ret i1 false
define i1 @ne_nuw_rem_zero_uses(i8 %x) {
; CHECK-LABEL: @ne_nuw_rem_zero_uses(
; CHECK-NEXT: [[A:%.*]] = mul nuw i8 [[X:%.*]], 5
; CHECK-NEXT: call void @use(i8 [[A]])
; CHECK-NEXT: [[B:%.*]] = icmp ne i8 [[A]], -126
; CHECK-NEXT: ret i1 [[B]]
;
%a = mul nuw i8 %x, 5
%b = icmp eq i8 %a, 31
call void @use(i8 %a)
%b = icmp ne i8 %a, 130
ret i1 %b
}
define i1 @ne_rem_nz(i8 %x) {
; CHECK-LABEL: @ne_rem_nz(
; Impossible multiple should be handled by instsimplify.
define i1 @eq_nuw_rem_nz(i8 %x) {
; CHECK-LABEL: @eq_nuw_rem_nz(
; CHECK-NEXT: ret i1 false
;
%a = mul nuw i8 %x, -5
%b = icmp eq i8 %a, 20
ret i1 %b
}
; Impossible multiple should be handled by instsimplify.
define i1 @ne_nuw_rem_nz(i8 %x) {
; CHECK-LABEL: @ne_nuw_rem_nz(
; CHECK-NEXT: ret i1 true
;
%a = mul nuw i8 %x, 5
%b = icmp ne i8 %a, 31
%b = icmp ne i8 %a, -30
ret i1 %b
}