yum-mirror/slang

Making it easier to work with shaders

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Yong HeSPIRV: Fix performance issue when handling large arrays. (#4064)0bb826f8b

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1//TEST:SIMPLE(filecheck=CHECK): -target spirv -emit-spirv-directly -profile glsl_460
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX(filecheck-buffer=BUF):-vk -compute
3//TEST(compute, vulkan):COMPARE_COMPUTE_EX(filecheck-buffer=BUF):-cpu -compute
4
5// Check that when generating spirv directly, we use a loop
6// to copy large arrays in a local variable to a buffer, instead of emitting
7// unrolled code that reads each element of the array individually.
8
9struct WorkData
10{
11    int B[1024];
12};
13
14//TEST_INPUT:set resultBuffer = out ubuffer(data=[0 0 0 0], stride=4, count=1024)
15RWStructuredBuffer<WorkData> resultBuffer;
16
17// CHECK: OpLoopMerge
18// CHECK: OpLoopMerge
19
20// BUF: 0
21// BUF: 1
22[numthreads(1, 1, 1)]
23void computeMain(uint3 tid: SV_DispatchThreadID)
24{
25    WorkData wd;
26    for (int i = 0; i < 1024; i++)
27        wd.B[i] = i;
28    resultBuffer[0] = wd;
29}