; RUN: opt < %s -instcombine -S | FileCheck %s
+define i64 @rem_signed(i64 %x1, i64 %y2) {
+; CHECK-LABEL: @rem_signed(
+; CHECK-NEXT: [[R:%.*]] = srem i64 %x1, %y2
+; CHECK-NEXT: ret i64 [[R]]
+;
+ %r = sdiv i64 %x1, %y2
+ %r7 = mul i64 %r, %y2
+ %r8 = sub i64 %x1, %r7
+ ret i64 %r8
+}
+
+define <4 x i32> @rem_signed_vec(<4 x i32> %t, <4 x i32> %u) {
+; CHECK-LABEL: @rem_signed_vec(
+; CHECK-NEXT: [[K:%.*]] = srem <4 x i32> %t, %u
+; CHECK-NEXT: ret <4 x i32> [[K]]
+;
+ %k = sdiv <4 x i32> %t, %u
+ %l = mul <4 x i32> %k, %u
+ %m = sub <4 x i32> %t, %l
+ ret <4 x i32> %m
+}
+
+define i64 @rem_unsigned(i64 %x1, i64 %y2) {
+; CHECK-LABEL: @rem_unsigned(
+; CHECK-NEXT: [[R:%.*]] = urem i64 %x1, %y2
+; CHECK-NEXT: ret i64 [[R]]
+;
+ %r = udiv i64 %x1, %y2
+ %r7 = mul i64 %r, %y2
+ %r8 = sub i64 %x1, %r7
+ ret i64 %r8
+}
+
+; PR28672 - https://llvm.org/bugs/show_bug.cgi?id=28672
+
+define i8 @big_divisor(i8 %x) {
+; CHECK-LABEL: @big_divisor(
+; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 %x, -127
+; CHECK-NEXT: [[TMP2:%.*]] = add i8 %x, 127
+; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 %x, i8 [[TMP2]]
+; CHECK-NEXT: ret i8 [[REM]]
+;
+ %rem = urem i8 %x, 129
+ ret i8 %rem
+}
+
+define i5 @biggest_divisor(i5 %x) {
+; CHECK-LABEL: @biggest_divisor(
+; CHECK-NEXT: [[NOT_:%.*]] = icmp eq i5 %x, -1
+; CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[NOT_]] to i5
+; CHECK-NEXT: [[REM:%.*]] = add i5 [[TMP1]], %x
+; CHECK-NEXT: ret i5 [[REM]]
+;
+ %rem = urem i5 %x, -1
+ ret i5 %rem
+}
+
+; TODO: Should vector subtract of constant be canonicalized to add?
+define <2 x i4> @big_divisor_vec(<2 x i4> %x) {
+; CHECK-LABEL: @big_divisor_vec(
+; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i4> %x, <i4 -3, i4 -3>
+; CHECK-NEXT: [[TMP2:%.*]] = sub <2 x i4> %x, <i4 -3, i4 -3>
+; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i4> %x, <2 x i4> [[TMP2]]
+; CHECK-NEXT: ret <2 x i4> [[REM]]
+;
+ %rem = urem <2 x i4> %x, <i4 13, i4 13>
+ ret <2 x i4> %rem
+}
+
+define i8 @urem1(i8 %x, i8 %y) {
+; CHECK-LABEL: @urem1(
+; CHECK-NEXT: [[A:%.*]] = urem i8 %x, %y
+; CHECK-NEXT: ret i8 [[A]]
+;
+ %A = udiv i8 %x, %y
+ %B = mul i8 %A, %y
+ %C = sub i8 %x, %B
+ ret i8 %C
+}
+
+define i8 @srem1(i8 %x, i8 %y) {
+; CHECK-LABEL: @srem1(
+; CHECK-NEXT: [[A:%.*]] = srem i8 %x, %y
+; CHECK-NEXT: ret i8 [[A]]
+;
+ %A = sdiv i8 %x, %y
+ %B = mul i8 %A, %y
+ %C = sub i8 %x, %B
+ ret i8 %C
+}
+
+define i8 @urem2(i8 %x, i8 %y) {
+; CHECK-LABEL: @urem2(
+; CHECK-NEXT: [[A:%.*]] = urem i8 %x, %y
+; CHECK-NEXT: [[C:%.*]] = sub i8 0, [[A]]
+; CHECK-NEXT: ret i8 [[C]]
+;
+ %A = udiv i8 %x, %y
+ %B = mul i8 %A, %y
+ %C = sub i8 %B, %x
+ ret i8 %C
+}
+
+define i8 @urem3(i8 %x) {
+; CHECK-LABEL: @urem3(
+; CHECK-NEXT: [[A:%.*]] = urem i8 %x, 3
+; CHECK-NEXT: [[B1:%.*]] = sub i8 %x, [[A]]
+; CHECK-NEXT: [[C:%.*]] = add i8 [[B1]], %x
+; CHECK-NEXT: ret i8 [[C]]
+;
+ %A = udiv i8 %x, 3
+ %B = mul i8 %A, -3
+ %C = sub i8 %x, %B
+ ret i8 %C
+}
+
+; (((X / Y) * Y) / Y) -> X / Y
+
+define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) {
+; CHECK-LABEL: @sdiv_mul_sdiv(
+; CHECK-NEXT: [[R:%.*]] = sdiv i32 %x, %y
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %div = sdiv i32 %x, %y
+ %mul = mul i32 %div, %y
+ %r = sdiv i32 %mul, %y
+ ret i32 %r
+}
+
+; (((X / Y) * Y) / Y) -> X / Y
+
+define i32 @udiv_mul_udiv(i32 %x, i32 %y) {
+; CHECK-LABEL: @udiv_mul_udiv(
+; CHECK-NEXT: [[R:%.*]] = udiv i32 %x, %y
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %div = udiv i32 %x, %y
+ %mul = mul i32 %div, %y
+ %r = udiv i32 %mul, %y
+ ret i32 %r
+}
+
define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i32 0
rem.is.unsafe:
ret i32 0
}
+
+++ /dev/null
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -instcombine -S | FileCheck %s
-
-define i64 @rem_unsigned(i64 %x1, i64 %y2) {
-; CHECK-LABEL: @rem_unsigned(
-; CHECK-NEXT: [[R:%.*]] = urem i64 %x1, %y2
-; CHECK-NEXT: ret i64 [[R]]
-;
- %r = udiv i64 %x1, %y2
- %r7 = mul i64 %r, %y2
- %r8 = sub i64 %x1, %r7
- ret i64 %r8
-}
-
-; PR28672 - https://llvm.org/bugs/show_bug.cgi?id=28672
-
-define i8 @big_divisor(i8 %x) {
-; CHECK-LABEL: @big_divisor(
-; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 %x, -127
-; CHECK-NEXT: [[TMP2:%.*]] = add i8 %x, 127
-; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 %x, i8 [[TMP2]]
-; CHECK-NEXT: ret i8 [[REM]]
-;
- %rem = urem i8 %x, 129
- ret i8 %rem
-}
-
-define i5 @biggest_divisor(i5 %x) {
-; CHECK-LABEL: @biggest_divisor(
-; CHECK-NEXT: [[NOT_:%.*]] = icmp eq i5 %x, -1
-; CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[NOT_]] to i5
-; CHECK-NEXT: [[REM:%.*]] = add i5 [[TMP1]], %x
-; CHECK-NEXT: ret i5 [[REM]]
-;
- %rem = urem i5 %x, -1
- ret i5 %rem
-}
-
-; TODO: Should vector subtract of constant be canonicalized to add?
-define <2 x i4> @big_divisor_vec(<2 x i4> %x) {
-; CHECK-LABEL: @big_divisor_vec(
-; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i4> %x, <i4 -3, i4 -3>
-; CHECK-NEXT: [[TMP2:%.*]] = sub <2 x i4> %x, <i4 -3, i4 -3>
-; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i4> %x, <2 x i4> [[TMP2]]
-; CHECK-NEXT: ret <2 x i4> [[REM]]
-;
- %rem = urem <2 x i4> %x, <i4 13, i4 13>
- ret <2 x i4> %rem
-}
-