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In order to avoid declaring too many function parameters, we previously modified this transform to redeclare private variables that are only used inside a single function as function-scope variables. This was broken as it meant that their values did not persist across multiple calls to the same function. Instead, wrap all private variables in a structure and pass it around as a pointer. Fixed: tint:1875 Change-Id: I83f5eb1071d57b9c6af56d6cf21b3a32c6e94260 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/124800 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: James Price <jrprice@google.com>
31 lines
881 B
Plaintext
31 lines
881 B
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct tint_private_vars_struct {
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bool tint_discarded;
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};
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void foo(thread tint_private_vars_struct* const tint_private_vars, device int* const tint_symbol_1) {
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if ((*(tint_symbol_1) < 0)) {
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(*(tint_private_vars)).tint_discarded = true;
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}
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}
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void bar(thread tint_private_vars_struct* const tint_private_vars, device float* const tint_symbol_2) {
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if (!((*(tint_private_vars)).tint_discarded)) {
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*(tint_symbol_2) = dfdx(1.0f);
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}
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}
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fragment void tint_symbol(device int* tint_symbol_3 [[buffer(0)]], device float* tint_symbol_4 [[buffer(1)]]) {
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thread tint_private_vars_struct tint_private_vars = {};
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tint_private_vars.tint_discarded = false;
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foo(&(tint_private_vars), tint_symbol_3);
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bar(&(tint_private_vars), tint_symbol_4);
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if (tint_private_vars.tint_discarded) {
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discard_fragment();
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}
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return;
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}
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