path: root/lib
diff options
authorEli Bendersky <>2013-04-19 01:04:40 +0000
committerEli Bendersky <>2013-04-19 01:04:40 +0000
commit5bd0767a040eae0d8f153c46238849e64e166018 (patch)
tree185061406ce7be92b2ef6da5abb24734a89670c9 /lib
parent89ec1c5c9c744c125b61145ed59783eb5c68ebf8 (diff)
Add some more stats for fast isel vs. SelectionDAG, w.r.t lowering function
arguments in entry BBs. git-svn-id: 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index eeea9e4cfcf..5db0234b6af 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -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");
+ "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) {
} else {
// Lower any arguments needed in this block if this is the entry block.
- if (LLVMBB == &Fn.getEntryBlock())
+ if (LLVMBB == &Fn.getEntryBlock()) {
+ ++NumEntryBlocks;
+ }
if (Begin != BI)