mirror of
https://github.com/KhronosGroup/glslang
synced 2024-09-19 20:29:54 +00:00
8c3d5b4b6c
More aggressively prune unreachable code as follows.
When no control flow edges reach a merge block or continue target:
- delete their contents so that:
- a merge block becomes OpLabel, then OpUnreachable
- a continue target becomes OpLabel, then an OpBranch back to the
loop header
- any basic block which is dominated by such a merge block or continue
target is removed as well.
- decorations targeting the removed instructions are removed.
Enables the SPIR-V builder post-processing step the GLSLANG_WEB case.
60 lines
1.0 KiB
GLSL
60 lines
1.0 KiB
GLSL
void f0() {
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for (;;) ;
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}
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void f1(float4 input) {
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for (++input; ; ) ;
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}
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void f2(float4 input) {
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[unroll] for (; any(input != input); ) {}
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}
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float f3(float4 input) {
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for (; any(input != input); ) { return -input; }
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}
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float f4(float4 input) {
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for (--input; any(input != input); input += 2) { return -input; }
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}
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void f5(float4 input) {
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for (;;) if (input.x > 2.0) break;
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}
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void f6(float4 input) {
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for (;;) if (input.x > 2.0) continue;
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}
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void f99() {
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for (int first = 0, second = 1; ;) first + second;
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}
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void f100(float ii) {
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for (--ii, --ii, --ii;;) ii;
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}
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float4 PixelShaderFunction(float4 input) : COLOR0
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{
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f0();
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f1(input);
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f2(input);
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f3(input);
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f4(input);
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f5(input);
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f6(input);
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float ii;
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for (int ii = -1; ii < 3; ++ii) if (ii == 2) continue;
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--ii;
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f99();
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for ( int i = 0, count = int(ii); i < count; i++ );
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for (float first = 0, second[2], third; first < second[0]; ++second[1]) first + second[1] + third;
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f100(ii);
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return input;
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}
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