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//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cpu -output-using-type -compile-arg -msvc-style-bitfield-packing
// MSVC packing with mixed type sizes
// CHECK: 15
// CHECK-NEXT: 255
// CHECK-NEXT: 4095
// CHECK-NEXT: 8
//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<uint> outputBuffer;
struct MixedTypes {
uint8_t a : 4; // Uses uint8_t backing, bits 7-4
uint8_t b : 4; // Same backing, bits 3-0
uint16_t c : 8; // New uint16_t backing due to type change, bits 15-8
uint16_t d : 8; // Same backing, bits 7-0
uint32_t e : 12; // New uint32_t backing due to type change, bits 31-20
uint32_t f : 12; // Same backing, bits 19-8
uint32_t g : 8; // Same backing, bits 7-0
};
[numthreads(1, 1, 1)]
void computeMain()
{
MixedTypes m;
m.a = 15; // 0xF
m.b = 15; // 0xF
m.c = 255; // 0xFF
m.d = 255; // 0xFF
m.e = 4095; // 0xFFF
m.f = 4095; // 0xFFF
m.g = 255; // 0xFF
outputBuffer[0] = m.a;
outputBuffer[1] = m.c;
outputBuffer[2] = m.e;
// Verify struct size includes all three backing fields
outputBuffer[3] = sizeof(MixedTypes);
}
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