From 6dca7e39292e6c5672440f6f1dbfb204a79b90d2 Mon Sep 17 00:00:00 2001 From: Yong He Date: Sat, 3 Feb 2024 12:29:12 -0800 Subject: Fix spirv emit that leads to pathological downstream time. (#3546) --- tests/spirv/array-param-gep.slang | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 tests/spirv/array-param-gep.slang (limited to 'tests/spirv') diff --git a/tests/spirv/array-param-gep.slang b/tests/spirv/array-param-gep.slang new file mode 100644 index 000000000..1a0de0c39 --- /dev/null +++ b/tests/spirv/array-param-gep.slang @@ -0,0 +1,34 @@ +//TEST:SIMPLE(filecheck=CHECK): -target spirv -entry computeMain -stage compute -emit-spirv-directly + +// Check that we are not generating spirv that loads a global resource array into a SSA register, +// instead, these arrays should always be accessed via direct OpAccessChain operations to avoid +// creating a lot of local load/stores in the driver compiler. + +struct Scene +{ + SamplerState samplers[256]; + Texture2D textures[100]; +} + +ParameterBlock scene; +struct Material +{ + int sampler; + int texture; +} + +RWStructuredBuffer result; + +float4 shade(Scene scene, Material mat) +{ + return scene.textures[mat.texture].SampleLevel(scene.samplers[mat.sampler], float2(0,0), 0); +} + +[numthreads(1,1,1)] +void computeMain(uniform Material mat) +{ + // CHECK: OpEntryPoint + // CHECK-NOT: OpLoad {{.*}} %scene{{.*}}samplers + // CHECK-NOT: OpLoad {{.*}} %scene{{.*}}textures + result[0] = shade(scene, mat); +} \ No newline at end of file -- cgit v1.2.3