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Reduce memory usage by freeing memory occupied by SILModules after IRGen.

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There is no need to keep SILModules around after IRGen has generated LLVM IR from them.
This reduces the compiler memory usage during LLVM code-generation and optimization phases roughly by 15%-20%.
This commit is contained in:
Roman Levenstein
2016-11-29 22:11:59 -08:00
parent a3e56f8bcf
commit 409d146f17
5 changed files with 36 additions and 20 deletions
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4
lib/FrontendTool/FrontendTool.cpp
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@@ -1073,10 +1073,10 @@ static bool performCompile(CompilerInstance &Instance,
// something is persisting across calls to performIRGeneration.
auto &LLVMContext = getGlobalLLVMContext();
if (PrimarySourceFile) {
performIRGeneration(IRGenOpts, *PrimarySourceFile, SM.get(),
performIRGeneration(IRGenOpts, *PrimarySourceFile, std::move(SM),
opts.getSingleOutputFilename(), LLVMContext);
} else {
performIRGeneration(IRGenOpts, Instance.getMainModule(), SM.get(),
performIRGeneration(IRGenOpts, Instance.getMainModule(), std::move(SM),
opts.getSingleOutputFilename(), LLVMContext);
}