[clang] [llvm] Add normalize builtins and normalize HLSL function to DirectX and SPIR-V backend (PR #102683)

[Farzon Lotfi via cfe-commits]

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@@ -0,0 +1,118 @@
+; RUN: opt -S  -dxil-intrinsic-expansion  < %s | FileCheck %s --check-prefixes=CHECK,EXPCHECK
+; RUN: opt -S  -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library < %s | FileCheck %s --check-prefixes=CHECK,DOPCHECK
+
+; Make sure dxil operation function calls for normalize are generated for half/float.
+
+declare half @llvm.dx.normalize.f16(half)
+declare <2 x half> @llvm.dx.normalize.v2f16(<2 x half>)
+declare <3 x half> @llvm.dx.normalize.v3f16(<3 x half>)
+declare <4 x half> @llvm.dx.normalize.v4f16(<4 x half>)
+
+declare float @llvm.dx.normalize.f32(float)
+declare <2 x float> @llvm.dx.normalize.v2f32(<2 x float>)
+declare <3 x float> @llvm.dx.normalize.v3f32(<3 x float>)
+declare <4 x float> @llvm.dx.normalize.v4f32(<4 x float>)
+
+define noundef half @test_normalize_half(half noundef %p0) {
+entry:
+  ; CHECK: fdiv half %p0, %p0
+  %hlsl.normalize = call half @llvm.dx.normalize.f16(half %p0)
+  ret half %hlsl.normalize
+}
+
+define noundef <2 x half> @test_normalize_half2(<2 x half> noundef %p0) {
+entry:
+  ; CHECK: extractelement <2 x half> %{{.*}}, i64 0
+  ; EXPCHECK: call half @llvm.dx.dot2.v2f16(<2 x half> %{{.*}}, <2 x half> %{{.*}})
+  ; DOPCHECK: call half @dx.op.dot2.f16(i32 54, half %{{.*}}, half %{{.*}}, half %{{.*}}, half %{{.*}})
+  ; EXPCHECK: call half @llvm.dx.rsqrt.f16(half %{{.*}})
+  ; DOPCHECK: call half @dx.op.unary.f16(i32 25, half %{{.*}})
+  ; CHECK: insertelement <2 x half> poison, half %{{.*}}, i64 0
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farzonl wrote:

Thanks this is much clearer and easier to follow the data flow!

https://github.com/llvm/llvm-project/pull/102683