================
@@ -0,0 +1,71 @@
+; RUN: opt -S -scalarizer -dxil-op-lower
-mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
+
+; CHECK: %dx.types.i32c = type { i32, i1 }
+
+define noundef i32 @test_UAddc(i32 noundef %a, i32 noundef %b) {
+; CHECK-LABEL: define noundef i32 @test_UAddc(
+; CHECK-SAME: i32 noundef [[A:%.*]], i32 noundef [[B:%.*]]) {
+; CHECK-NEXT: [[UADDC:%.*]] = call [[DX_TYPES_I32C:%dx\.types\.i32c]]
@dx.op.binaryWithCarryOrBorrow.i32(i32 44, i32 [[A]], i32 [[B]])
#[[ATTR0:[0-9]+]]
+; CHECK-NEXT: [[CARRY:%.*]] = extractvalue [[DX_TYPES_I32C]] [[UADDC]], 1
+; CHECK-NEXT: [[SUM:%.*]] = extractvalue [[DX_TYPES_I32C]] [[UADDC]], 0
+; CHECK-NEXT: [[CARRY_ZEXT:%.*]] = zext i1 [[CARRY]] to i32
+; CHECK-NEXT: [[RESULT:%.*]] = add i32 [[SUM]], [[CARRY_ZEXT]]
+; CHECK-NEXT: ret i32 [[RESULT]]
+;
+ %uaddc = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b)
+ %carry = extractvalue { i32, i1 } %uaddc, 1
+ %sum = extractvalue { i32, i1 } %uaddc, 0
+ %carry_zext = zext i1 %carry to i32
+ %result = add i32 %sum, %carry_zext
+ ret i32 %result
+}
+
+define noundef <2 x i32> @test_UAddc_vec2(<2 x i32> noundef %a, <2 x i32>
noundef %b) {
+; CHECK-LABEL: define noundef <2 x i32> @test_UAddc_vec2(
+; CHECK-SAME: <2 x i32> noundef [[A:%.*]], <2 x i32> noundef [[B:%.*]]) {
+; CHECK-NEXT: [[A_I0:%.*]] = extractelement <2 x i32> [[A]], i64 0
+; CHECK-NEXT: [[B_I0:%.*]] = extractelement <2 x i32> [[B]], i64 0
+; CHECK-NEXT: [[UADDC_I0:%.*]] = call [[DX_TYPES_I32C:%dx\.types\.i32c]]
@dx.op.binaryWithCarryOrBorrow.i32(i32 44, i32 [[A_I0]], i32 [[B_I0]])
#[[ATTR0]]
----------------
farzonl wrote:
TO be clear this isn't wrong its just confusing because I'm expecting to see a
`shufflevector <4 x i32> ` to `2 xi32` conversion before I see you using
`@llvm.uadd.with.overflow.v2i32` based on how you did the clang codegen.
https://github.com/llvm/llvm-project/pull/127137
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