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11d09f2fe7
Emit the "[loop]" attribute on "for" and "while" so that FXC does not attempt to unroll them. This is to work around an FXC bug where it fails to unroll loops with gradient operations. FXC ostensibly unrolls such loops because gradient operations require uniform control flow, and loops that have varying iterations may possibly not be uniform. Tint will eventually validate that control flow is indeed uniform, so forcing FXC to avoid unrolling in these cases should be fine. Bug: tint:1112 Change-Id: I10077f8b62fbbb230a0003f3864c75a8fe0e1d18 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69880 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Antonio Maiorano <amaiorano@google.com>
40 lines
791 B
HLSL
40 lines
791 B
HLSL
bug/tint/1081.wgsl:9:25 warning: integral user-defined fragment inputs must have a flat interpolation attribute
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fn main([[location(1)]] x: vec3<i32>) -> [[location(2)]] i32 {
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^
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int f(int x) {
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if (true) {
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if ((x == 10)) {
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discard;
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}
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return x;
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}
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int unused;
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return unused;
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}
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struct tint_symbol_1 {
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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 ((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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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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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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