[InstCombine] Add various other modulo-by-constant tests for Issue #22303

llvm/test/Transforms/InstCombine/modulo.ll

 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -S -passes=instcombine | FileCheck %s
 
-define i32 @PR21929(i32 %x) {
-; CHECK-LABEL: @PR21929(
+; PR21929
+define i32 @modulo2(i32 %x) {
+; CHECK-LABEL: @modulo2(
 ; CHECK-NEXT:    [[REM_I:%.*]] = srem i32 [[X:%.*]], 2
 ; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[REM_I]], 2
 ; CHECK-NEXT:    [[RET_I:%.*]] = add nsw i32 [[TMP1]], [[REM_I]]
@@ -15,8 +16,8 @@ define i32 @PR21929(i32 %x) {
   ret i32 %ret.i
 }
 
-define <2 x i32> @PR21929_vec(<2 x i32> %x) {
-; CHECK-LABEL: @PR21929_vec(
+define <2 x i32> @modulo2_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo2_vec(
 ; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 2, i32 2>
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i32> [[REM_I]], <i32 2, i32 2>
 ; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[TMP1]], [[REM_I]]
@@ -28,3 +29,134 @@ define <2 x i32> @PR21929_vec(<2 x i32> %x) {
   %ret.i = add nsw <2 x i32> %add.i, %rem.i
   ret <2 x i32> %ret.i
 }
+
+define i32 @modulo3(i32 %x) {
+; CHECK-LABEL: @modulo3(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem i32 [[X:%.*]], 3
+; CHECK-NEXT:    [[CMP_I:%.*]] = icmp slt i32 [[REM_I]], 0
+; CHECK-NEXT:    [[ADD_I:%.*]] = select i1 [[CMP_I]], i32 3, i32 0
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw i32 [[ADD_I]], [[REM_I]]
+; CHECK-NEXT:    ret i32 [[RET_I]]
+;
+  %rem.i = srem i32 %x, 3
+  %cmp.i = icmp slt i32 %rem.i, 0
+  %add.i = select i1 %cmp.i, i32 3, i32 0
+  %ret.i = add nsw i32 %add.i, %rem.i
+  ret i32 %ret.i
+}
+
+define <2 x i32> @modulo3_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo3_vec(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 3, i32 3>
+; CHECK-NEXT:    [[CMP_I:%.*]] = icmp slt <2 x i32> [[REM_I]], zeroinitializer
+; CHECK-NEXT:    [[ADD_I:%.*]] = select <2 x i1> [[CMP_I]], <2 x i32> <i32 3, i32 3>, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[ADD_I]], [[REM_I]]
+; CHECK-NEXT:    ret <2 x i32> [[RET_I]]
+;
+  %rem.i = srem <2 x i32> %x, <i32 3, i32 3>
+  %cmp.i = icmp slt <2 x i32> %rem.i, zeroinitializer
+  %add.i = select <2 x i1> %cmp.i, <2 x i32> <i32 3, i32 3>, <2 x i32> zeroinitializer
+  %ret.i = add nsw <2 x i32> %add.i, %rem.i
+  ret <2 x i32> %ret.i
+}
+
+define i32 @modulo4(i32 %x) {
+; CHECK-LABEL: @modulo4(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem i32 [[X:%.*]], 4
+; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[REM_I]], 4
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw i32 [[TMP1]], [[REM_I]]
+; CHECK-NEXT:    ret i32 [[RET_I]]
+;
+  %rem.i = srem i32 %x, 4
+  %cmp.i = icmp slt i32 %rem.i, 0
+  %add.i = select i1 %cmp.i, i32 4, i32 0
+  %ret.i = add nsw i32 %add.i, %rem.i
+  ret i32 %ret.i
+}
+
+define <2 x i32> @modulo4_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo4_vec(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 4, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i32> [[REM_I]], <i32 4, i32 4>
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[TMP1]], [[REM_I]]
+; CHECK-NEXT:    ret <2 x i32> [[RET_I]]
+;
+  %rem.i = srem <2 x i32> %x, <i32 4, i32 4>
+  %cmp.i = icmp slt <2 x i32> %rem.i, zeroinitializer
+  %add.i = select <2 x i1> %cmp.i, <2 x i32> <i32 4, i32 4>, <2 x i32> zeroinitializer
+  %ret.i = add nsw <2 x i32> %add.i, %rem.i
+  ret <2 x i32> %ret.i
+}
+
+define i32 @modulo7(i32 %x) {
+; CHECK-LABEL: @modulo7(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem i32 [[X:%.*]], 7
+; CHECK-NEXT:    [[CMP_I:%.*]] = icmp slt i32 [[REM_I]], 0
+; CHECK-NEXT:    [[ADD_I:%.*]] = select i1 [[CMP_I]], i32 7, i32 0
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw i32 [[ADD_I]], [[REM_I]]
+; CHECK-NEXT:    ret i32 [[RET_I]]
+;
+  %rem.i = srem i32 %x, 7
+  %cmp.i = icmp slt i32 %rem.i, 0
+  %add.i = select i1 %cmp.i, i32 7, i32 0
+  %ret.i = add nsw i32 %add.i, %rem.i
+  ret i32 %ret.i
+}
+
+define <2 x i32> @modulo7_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo7_vec(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 7, i32 7>
+; CHECK-NEXT:    [[CMP_I:%.*]] = icmp slt <2 x i32> [[REM_I]], zeroinitializer
+; CHECK-NEXT:    [[ADD_I:%.*]] = select <2 x i1> [[CMP_I]], <2 x i32> <i32 7, i32 7>, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[ADD_I]], [[REM_I]]
+; CHECK-NEXT:    ret <2 x i32> [[RET_I]]
+;
+  %rem.i = srem <2 x i32> %x, <i32 7, i32 7>
+  %cmp.i = icmp slt <2 x i32> %rem.i, zeroinitializer
+  %add.i = select <2 x i1> %cmp.i, <2 x i32> <i32 7, i32 7>, <2 x i32> zeroinitializer
+  %ret.i = add nsw <2 x i32> %add.i, %rem.i
+  ret <2 x i32> %ret.i
+}
+
+define i32 @modulo32(i32 %x) {
+; CHECK-LABEL: @modulo32(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem i32 [[X:%.*]], 32
+; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[REM_I]], 32
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw i32 [[TMP1]], [[REM_I]]
+; CHECK-NEXT:    ret i32 [[RET_I]]
+;
+  %rem.i = srem i32 %x, 32
+  %cmp.i = icmp slt i32 %rem.i, 0
+  %add.i = select i1 %cmp.i, i32 32, i32 0
+  %ret.i = add nsw i32 %add.i, %rem.i
+  ret i32 %ret.i
+}
+
+define <2 x i32> @modulo32_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo32_vec(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 32, i32 32>
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i32> [[REM_I]], <i32 32, i32 32>
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[TMP1]], [[REM_I]]
+; CHECK-NEXT:    ret <2 x i32> [[RET_I]]
+;
+  %rem.i = srem <2 x i32> %x, <i32 32, i32 32>
+  %cmp.i = icmp slt <2 x i32> %rem.i, zeroinitializer
+  %add.i = select <2 x i1> %cmp.i, <2 x i32> <i32 32, i32 32>, <2 x i32> zeroinitializer
+  %ret.i = add nsw <2 x i32> %add.i, %rem.i
+  ret <2 x i32> %ret.i
+}
+
+define <2 x i32> @modulo16_32_vec(<2 x i32> %x) {
+; CHECK-LABEL: @modulo16_32_vec(
+; CHECK-NEXT:    [[REM_I:%.*]] = srem <2 x i32> [[X:%.*]], <i32 16, i32 32>
+; CHECK-NEXT:    [[CMP_I:%.*]] = icmp slt <2 x i32> [[REM_I]], zeroinitializer
+; CHECK-NEXT:    [[ADD_I:%.*]] = select <2 x i1> [[CMP_I]], <2 x i32> <i32 16, i32 32>, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[RET_I:%.*]] = add nsw <2 x i32> [[ADD_I]], [[REM_I]]
+; CHECK-NEXT:    ret <2 x i32> [[RET_I]]
+;
+  %rem.i = srem <2 x i32> %x, <i32 16, i32 32>
+  %cmp.i = icmp slt <2 x i32> %rem.i, zeroinitializer
+  %add.i = select <2 x i1> %cmp.i, <2 x i32> <i32 16, i32 32>, <2 x i32> zeroinitializer
+  %ret.i = add nsw <2 x i32> %add.i, %rem.i
+  ret <2 x i32> %ret.i
+}