[clang] [llvm] [HLSL][DXIL][SPIRV] QuadReadAcrossY intrinsic support (PR #187440)

[via llvm-commits]

================
@@ -0,0 +1,46 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -triple \
+// RUN:   dxil-pc-shadermodel6.3-compute %s -emit-llvm -disable-llvm-passes -o - | \
+// RUN:   FileCheck %s --check-prefixes=CHECK,CHECK-DXIL
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -triple \
+// RUN:   spirv-pc-vulkan-compute %s -emit-llvm -disable-llvm-passes -o - | \
+// RUN:   FileCheck %s --check-prefixes=CHECK,CHECK-SPIRV
+
+// Test basic lowering to runtime function call.
+
+// CHECK-LABEL: test_int
+int test_int(int expr) {
+  // CHECK-SPIRV:  %[[RET:.*]] = call spir_func [[TY:.*]] @llvm.spv.quad.read.across.y.i32([[TY]] %[[#]])
+  // CHECK-DXIL:  %[[RET:.*]] = call [[TY:.*]] @llvm.dx.quad.read.across.y.i32([[TY]] %[[#]])
+  // CHECK:  ret [[TY]] %[[RET]]
+  return QuadReadAcrossY(expr);
+}
+
+// CHECK-DXIL: declare [[TY]] @llvm.dx.quad.read.across.y.i32([[TY]]) #[[#attr:]]
+// CHECK-SPIRV: declare [[TY]] @llvm.spv.quad.read.across.y.i32([[TY]]) #[[#attr:]]
----------------
kcloudy0717 wrote:

I'll apply the feedback to QuadReadAcrossX's test since those tests are not comprehensive as well. I'll open a separate PR for this and tag you for review.

https://github.com/llvm/llvm-project/pull/187440