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IPO: INTERPROCEDURAL_OPTIMIZATION (LTCG) for Visual Studio

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Add IPO support for Visual Studio (which is referred to by VS as
"Link Time Code Generation" and "Whole Program Optimization"), for
VS version >= 10.  This allows CMake/VS users to enable IPO by setting
property `INTERPROCEDURAL_OPTIMIZATION`.

Fixes: #16748
This commit is contained in:
Niels Dekker
2018-09-09 23:04:59 +02:00
committed by Brad King
parent ccb6dab9f1
commit 567fabe88e
7 changed files with 19 additions and 5 deletions
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Source/cmVisualStudio10TargetGenerator.cxx
+7 -2
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@@ -1122,6 +1122,9 @@ void cmVisualStudio10TargetGenerator::WriteMSToolConfigurationValues(
this->GeneratorTarget->GetPropertyAsBool("VS_WINRT_EXTENSIONS")) {
e1.Element("WindowsAppContainer", "true");
}
if (this->IPOEnabledConfigurations.count(config) > 0) {
e1.Element("WholeProgramOptimization", "true");
}
}
void cmVisualStudio10TargetGenerator::WriteMSToolConfigurationValuesManaged(
@@ -2485,8 +2488,10 @@ bool cmVisualStudio10TargetGenerator::ComputeClOptions(
clOptions.AddFlag("CompileAs", "CompileAsCpp");
}
// Check IPO related warning/error.
this->GeneratorTarget->IsIPOEnabled(linkLanguage, configName);
// Put the IPO enabled configurations into a set.
if (this->GeneratorTarget->IsIPOEnabled(linkLanguage, configName)) {
this->IPOEnabledConfigurations.insert(configName);
}
// Get preprocessor definitions for this directory.
std::string defineFlags = this->Makefile->GetDefineFlags();