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.
30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
spv.dead-after-return.vert
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// Module Version 10000
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// Generated by (magic number): 80007
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// Id's are bound by 14
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Capability Shader
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1: ExtInstImport "GLSL.std.450"
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MemoryModel Logical GLSL450
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EntryPoint Vertex 4 "main" 8 13
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Source GLSL 450
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Name 4 "main"
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Name 8 "o"
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Name 13 "c"
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Decorate 8(o) Location 0
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Decorate 13(c) Location 0
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2: TypeVoid
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3: TypeFunction 2
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6: TypeInt 32 1
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7: TypePointer Output 6(int)
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8(o): 7(ptr) Variable Output
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9: 6(int) Constant 1
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11: 6(int) Constant 3
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12: TypePointer Input 6(int)
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13(c): 12(ptr) Variable Input
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4(main): 2 Function None 3
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5: Label
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Store 8(o) 9
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Return
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FunctionEnd
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