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[Analysis] RemoveTotalMemInst counting in InstCount to avoid reading back other Statistic variables 

Summary:
Previously, we counted TotalMemInst by reading certain instruction counters before and after calling visit and then finding the difference. But that wouldn't be thread safe if this same pass was being ran on multiple threads.

This list of "memory instructions" doesn't make sense to me as it includes call/invoke and is missing atomics.

This patch removes the counter all together.

Reviewers: hfinkel, chandlerc, davide

Reviewed By: davide

Subscribers: davide, llvm-commits

Differential Revision: https://reviews.llvm.org/D33608

llvm-svn: 308260
This commit is contained in:
Craig Topper 2017-07-18 02:41:12 +00:00
parent 5d77c20a7a
commit 9e465894f8
1 changed files with 0 additions and 8 deletions
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8
llvm/lib/Analysis/InstCount.cpp
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@ -26,7 +26,6 @@ using namespace llvm;
STATISTIC(TotalInsts , "Number of instructions (of all types)");
STATISTIC(TotalBlocks, "Number of basic blocks");
STATISTIC(TotalFuncs , "Number of non-external functions");
STATISTIC(TotalMemInst, "Number of memory instructions");
#define HANDLE_INST(N, OPCODE, CLASS) \
STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
@ -75,13 +74,6 @@ FunctionPass *llvm::createInstCountPass() { return new InstCount(); }
// function.
//
bool InstCount::runOnFunction(Function &F) {
unsigned StartMemInsts =
NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
NumInvokeInst + NumAllocaInst;
visit(F);
unsigned EndMemInsts =
NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
NumInvokeInst + NumAllocaInst;
TotalMemInst += EndMemInsts-StartMemInsts;
return false;
}