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Implement optional link-time cross stage optimization

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Daniel Story 2024-09-12 12:18:09 -07:00 • committed by arcady-lunarg
parent 9d00d6d6ca
commit 05559a2963
6 changed files with 124 additions and 2 deletions
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12
StandAlone/StandAlone.cpp
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@ -109,6 +109,7 @@ enum TOptions : uint64_t {
EOptionDumpBareVersion = (1ull << 31),
EOptionCompileOnly = (1ull << 32),
EOptionDisplayErrorColumn = (1ull << 33),
EOptionLinkTimeOptimization = (1ull << 34),
};
bool targetHlslFunctionality1 = false;
bool SpvToolsDisassembler = false;
@ -899,6 +900,8 @@ void ProcessArguments(std::vector<std::unique_ptr<glslang::TWorkItem>>& workItem
Options |= EOptionCompileOnly;
} else if (lowerword == "error-column") {
Options |= EOptionDisplayErrorColumn;
} else if (lowerword == "lto") {
Options |= EOptionLinkTimeOptimization;
} else if (lowerword == "help") {
usage();
break;
@ -1083,6 +1086,10 @@ void ProcessArguments(std::vector<std::unique_ptr<glslang::TWorkItem>>& workItem
if ((Options & EOptionDumpReflection) && !(Options & EOptionLinkProgram))
Error("reflection requires -l for linking");
// link time optimization makes no sense unless linking
if ((Options & EOptionLinkTimeOptimization) && !(Options & EOptionLinkProgram))
Error("link time optimization requires -l for linking");
// -o or -x makes no sense if there is no target binary
if (binaryFileName && (Options & EOptionSpv) == 0)
Error("no binary generation requested (e.g., -V)");
@ -1167,6 +1174,8 @@ void SetMessageOptions(EShMessages& messages)
messages = (EShMessages)(messages | EShMsgAbsolutePath);
if (Options & EOptionDisplayErrorColumn)
messages = (EShMessages)(messages | EShMsgDisplayErrorColumn);
if (Options & EOptionLinkTimeOptimization)
messages = (EShMessages)(messages | EShMsgLinkTimeOptimization);
}
//
@ -2135,7 +2144,8 @@ void usage()
" initialized with the shader binary code\n"
" --no-link Only compile shader; do not link (GLSL-only)\n"
" NOTE: this option will set the export linkage\n"
" attribute on all functions\n");
" attribute on all functions\n"
" --lto perform link time optimization\n");
exit(EFailUsage);
}