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// for-continue-ext.slang
// Test case of a `for` loop that
// has multiple paths to continue
// the loop (both the ordinary one
// and an explicit `continue`)
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -profile cs_6_0 -xslang -DHACK
//DISABLE_TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -xslang -DHACK
//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -capability 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 4
#define ITER_COUNT THREAD_COUNT
#define WRITE_VAL(LOC, ITER, VAL) buffer[tid + (LOC)*THREAD_COUNT + (ITER)*THREAD_COUNT*LOC_COUNT] = 0xA0000000 | (tid << 24) | (ITER << 16) | (LOC << 8) | VAL
#define WRITE(LOC, ITER) WRITE_VAL(LOC, ITER, WaveGetActiveMask())
//TEST_INPUT:cbuffer(data=[0 1]):name C
cbuffer C
{
int alwaysFalse;
int alwaysTrue;
}
void test(uint tid)
{
for(int ii = 0; ii < tid; ++ii)
{
WRITE(0, ii);
if((tid & 1) != 0)
{
if((tid & 2) != 0)
{
// Note: because of the two `if(alwaysFalse) break;` branches
// here, the `WRITE(3,ii)` at the end of the loop body no
// longer post-dominates the entry to the `if`, so that
// implemenations that use immediate post-dominator
// reconvergence will not properly reconvergence lanes
// one and two at that point.
//
// The Slang synthesis pass for the active mask produces
// the expected/desired result even in the presence of
// these additional control-flow edges.
#ifndef HACK
if(alwaysFalse != 0) break;
#endif
WRITE(1, ii);
continue;
}
else
{
#ifndef HACK
if(alwaysFalse != 0) break;
#endif
WRITE(2, ii);
}
}
WRITE(3, ii);
}
WRITE(4, 0);
}
[numthreads(THREAD_COUNT, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
test(dispatchThreadID.x);
}
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