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Implement new transform UnwindDiscardFunctions that replaces discard statements with setting a module-level bool, adds a check and return for this bool after every function call that may discard, and finally invokes a single function that executes a discard from top-level functions. Regenerated tests and remove HLSL ones that used to fail FXC because it had difficulty with discard. Bug: tint:1478 Bug: chromium:1118 Change-Id: I09d680f59e2d5d0cad907bfbbdd426aae76d4bf3 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/84221 Reviewed-by: James Price <jrprice@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Antonio Maiorano <amaiorano@google.com>
47 lines
831 B
HLSL
47 lines
831 B
HLSL
static bool tint_discard = false;
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int f(int x) {
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if ((x == 10)) {
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tint_discard = true;
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return 0;
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}
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return x;
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}
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struct tint_symbol_1 {
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nointerpolation int3 x : TEXCOORD1;
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};
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struct tint_symbol_2 {
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int value : SV_Target2;
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};
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int main_inner(int3 x) {
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int y = x.x;
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[loop] while (true) {
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const int r = f(y);
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if (tint_discard) {
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return 0;
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}
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if ((r == 0)) {
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break;
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}
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}
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return y;
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}
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void tint_discard_func() {
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discard;
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}
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tint_symbol_2 main(tint_symbol_1 tint_symbol) {
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const int inner_result = main_inner(tint_symbol.x);
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if (tint_discard) {
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tint_discard_func();
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const tint_symbol_2 tint_symbol_3 = (tint_symbol_2)0;
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return tint_symbol_3;
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}
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tint_symbol_2 wrapper_result = (tint_symbol_2)0;
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wrapper_result.value = inner_result;
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return wrapper_result;
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}
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