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744d0eb4aa
Discard statements no longer affect the behavior or uniformity analysis. Update the resolver, validator, and several tests to reflect this. Some E2E tests were removed as they had loops that are now considered to be infinite. Use the DemoteToHelper transform to emulate the correct semantics on platforms where discard is (or may) terminate the invocation in a manner that would affect derivative operations. We no longer need the UnwindDiscardFunctions transform for HLSL, which already implements the correct semantics. However, we still run the DemoteToHelper transform for the HLSL backend due to issues with FXC's handling of discard statements (see crbug.com/tint/1118). Fixed: tint:1723 Change-Id: Ib49ff187919ae81c4af8675e1b66acd57e2ff7d2 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/109003 Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: James Price <jrprice@google.com>
26 lines
638 B
Plaintext
26 lines
638 B
Plaintext
#include <metal_stdlib>
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using namespace metal;
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void foo(device int* const tint_symbol_1, thread bool* const tint_symbol_2) {
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if ((*(tint_symbol_1) < 0)) {
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*(tint_symbol_2) = true;
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}
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}
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void bar(thread bool* const tint_symbol_3, device float* const tint_symbol_4) {
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if (!(*(tint_symbol_3))) {
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*(tint_symbol_4) = dfdx(1.0f);
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}
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}
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fragment void tint_symbol(device int* tint_symbol_5 [[buffer(0)]], device float* tint_symbol_7 [[buffer(1)]]) {
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thread bool tint_symbol_6 = false;
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foo(tint_symbol_5, &(tint_symbol_6));
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bar(&(tint_symbol_6), tint_symbol_7);
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if (tint_symbol_6) {
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discard_fragment();
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}
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return;
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}
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