[clang] [llvm] [HLSL] Implement ddx/ddy_coarse intrinsics (PR #164831)

[Farzon Lotfi via llvm-commits]

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+// RUN: %clang_cc1 -finclude-default-header  -x hlsl  -triple dxil-pc-shadermodel6.3-library %s \
+// RUN:  -emit-llvm -disable-llvm-passes -fnative-half-type -o - | \
+// RUN:  FileCheck %s --check-prefixes=CHECK
+
+// CHECK: define hidden noundef nofpclass(nan inf) half @
+// CHECK: %hlsl.ddy.coarse = call reassoc nnan ninf nsz arcp afn half @llvm.dx.ddy.coarse.f16(half %{{.*}})
+// CHECK: ret half %hlsl.ddy.coarse
+half test_f16_ddy_coarse(half val) {
+    return __builtin_hlsl_elementwise_ddy_coarse(val);
+}
+
+// CHECK: define hidden noundef nofpclass(nan inf) float @
+// CHECK: %hlsl.ddy.coarse = call reassoc nnan ninf nsz arcp afn float @llvm.dx.ddy.coarse.f32(float %{{.*}})
+// CHECK: ret float %hlsl.ddy.coarse
+float test_f32_ddy_coarse(float val) {
+    return __builtin_hlsl_elementwise_ddy_coarse(val);
+}
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farzonl wrote:

add a new line

https://github.com/llvm/llvm-project/pull/164831