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Add some more stats for fast isel vs. SelectionDAG, w.r.t lowering function 

arguments in entry BBs.

llvm-svn: 179824
This commit is contained in:
Eli Bendersky 2013-04-19 01:04:40 +00:00
parent 982934e7d4
commit 6084f45f38
1 changed files with 10 additions and 1 deletions
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11
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -63,12 +63,16 @@ STATISTIC(NumFastIselSuccess, "Number of instructions fast isel selected");
STATISTIC(NumFastIselBlocks, "Number of blocks selected entirely by fast isel");
STATISTIC(NumDAGBlocks, "Number of blocks selected using DAG");
STATISTIC(NumDAGIselRetries,"Number of times dag isel has to try another path");
STATISTIC(NumEntryBlocks, "Number of entry blocks encountered");
STATISTIC(NumFastIselFailLowerArguments,
"Number of entry blocks where fast isel failed to lower arguments");
#ifndef NDEBUG
static cl::opt<bool>
EnableFastISelVerbose2("fast-isel-verbose2", cl::Hidden,
cl::desc("Enable extra verbose messages in the \"fast\" "
"instruction selector"));
// Terminators
STATISTIC(NumFastIselFailRet,"Fast isel fails on Ret");
STATISTIC(NumFastIselFailBr,"Fast isel fails on Br");
@ -1054,9 +1058,12 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) {
// Emit code for any incoming arguments. This must happen before
// beginning FastISel on the entry block.
if (LLVMBB == &Fn.getEntryBlock()) {
++NumEntryBlocks;
// Lower any arguments needed in this block if this is the entry block.
if (!FastIS->LowerArguments()) {
// Fast isel failed to lower these arguments
++NumFastIselFailLowerArguments;
if (EnableFastISelAbortArgs)
llvm_unreachable("FastISel didn't lower all arguments");
@ -1178,8 +1185,10 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) {
FastIS->recomputeInsertPt();
} else {
// Lower any arguments needed in this block if this is the entry block.
if (LLVMBB == &Fn.getEntryBlock())
if (LLVMBB == &Fn.getEntryBlock()) {
++NumEntryBlocks;
LowerArguments(Fn);
}
}
if (Begin != BI)