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Elaborate why we have an option on by default for enabling chr.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2019-04-18 06:17:40 +00:00
parent fed299e82d
commit 1d7ad3c0a6
2 changed files with 4 additions and 0 deletions
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2
lib/Passes/PassBuilder.cpp
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@ -209,6 +209,8 @@ static cl::opt<bool> EnableSyntheticCounts(
static Regex DefaultAliasRegex(
"^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
// This option is used in simplifying testing SampleFDO optimizations for
// profile loading.
static cl::opt<bool>
EnableCHR("enable-chr-npm", cl::init(true), cl::Hidden,
cl::desc("Enable control height reduction optimization (CHR)"));

2
lib/Transforms/IPO/PassManagerBuilder.cpp
View File

@ -139,6 +139,8 @@ static cl::opt<bool> EnableGVNSink(
"enable-gvn-sink", cl::init(false), cl::Hidden,
cl::desc("Enable the GVN sinking pass (default = off)"));
// This option is used in simplifying testing SampleFDO optimizations for
// profile loading.
static cl::opt<bool>
EnableCHR("enable-chr", cl::init(true), cl::Hidden,
cl::desc("Enable control height reduction optimization (CHR)"));