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// switch-trivial-fallthrough.slang
// Test active mask synthesis for a `switch` statement
// that exhibits "trivial fall-through" from one `case`
// to another.
// We've ended up having to disable this test everywhere,
// which really speaks to the way that the "active mask" concept
// in D3D and Vulkan was never really specified to a level
// that makes it meaningful.
//
// Even if the specs get fixed at some point down the line,
// we can't really re-enable these tests because they'd fail on way
// too many GPUs and driver versions.
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -shaderobj
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -profile cs_6_0 -xslang -DHACK -shaderobj
//DISABLE_TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -xslang -DHACK -shaderobj
// Note: this test is currently disabled on the CUDA
// target because we do not synthesize the active
// mask value we want/expect to see.
//
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -render-features cuda_sm_7_0
//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0], stride=4):out,name buffer
RWStructuredBuffer<int> buffer;
#define THREAD_COUNT 4
#define LOC_COUNT 5
#define WRITE(LOC) buffer[tid + (LOC)*THREAD_COUNT] = 0xA0000000 | (tid << 24) | (LOC << 8) | WaveGetActiveMask()
//TEST_INPUT:cbuffer(data=[0 1]):name C
cbuffer C
{
int alwaysFalse;
int alwaysTrue;
}
void test(int tid)
{
switch(tid)
{
case 0:
case 1:
WRITE(0);
break;
case 2:
default:
WRITE(2);
break;
}
WRITE(4);
}
[numthreads(THREAD_COUNT, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
test(dispatchThreadID.x);
}
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