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- Part of optimal static profiling patch sequence by Andreas Neustifter.

 - Store edge, block, and function information separately for each functions
   (instead of in one giant map).

 - Return frequencies as double instead of int, and use a sentinel value for
   missing information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-08-08 17:43:09 +00:00
parent 3e0094d969
commit caaa49336b
7 changed files with 157 additions and 91 deletions
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7
lib/Transforms/Instrumentation/BlockProfiling.cpp
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@@ -106,7 +106,8 @@ bool BlockProfiler::runOnModule(Module &M) {
unsigned NumBlocks = 0;
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
NumBlocks += I->size();
if (!I->isDeclaration())
NumBlocks += I->size();
const Type *ATy = ArrayType::get(Type::Int32Ty, NumBlocks);
GlobalVariable *Counters =
@@ -115,10 +116,12 @@ bool BlockProfiler::runOnModule(Module &M) {
// Instrument all of the blocks...
unsigned i = 0;
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
if (I->isDeclaration()) continue;
for (Function::iterator BB = I->begin(), E = I->end(); BB != E; ++BB)
// Insert counter at the start of the block
IncrementCounterInBlock(BB, i++, Counters);
}
// Add the initialization call to main.
InsertProfilingInitCall(Main, "llvm_start_block_profiling", Counters);