mirror of
https://github.com/KhronosGroup/glslang
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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.
24 lines
292 B
GLSL
24 lines
292 B
GLSL
#version 450
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layout(location =0 ) in int c;
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layout(location =0 ) out int o;
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void main() {
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int i = 0;
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o = 1;
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do {
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o = 2;
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return;
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o = 3;
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} while(i++ < 5);
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// All this is a dead merge block.
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o = 4;
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if (c==4) {
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o = 100;
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} else {
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o = 200;
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}
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o = 300;
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}
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