Add options to dump block frequency/branch probability info in text.
Summary:
Add options -print-bfi/-print-bpi that dump block frequency and branch
probability info like -view-block-freq-propagation-dags and
-view-machine-block-freq-propagation-dags do but in text.
This is useful when the graph is very large and complex (the dot command
crashes, lines/edges too close to tell apart, hard to navigate without textual
search) or simply when text is preferred.
Reviewers: davidxl
Reviewed By: davidxl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D37165
llvm-svn: 311822
diff --git a/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp b/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
index 104180a..14cd912 100644
--- a/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
+++ b/llvm/lib/CodeGen/MachineBlockFrequencyInfo.cpp
@@ -68,6 +68,14 @@
// Defined in Analysis/BlockFrequencyInfo.cpp: -view-hot-freq-perc=
extern cl::opt<unsigned> ViewHotFreqPercent;
+static cl::opt<bool> PrintMachineBlockFreq(
+ "print-machine-bfi", cl::init(false), cl::Hidden,
+ cl::desc("Print the machine block frequency info."));
+
+// Command line option to specify the name of the function for block frequency
+// dump. Defined in Analysis/BlockFrequencyInfo.cpp.
+extern cl::opt<std::string> PrintBlockFreqFuncName;
+
static GVDAGType getGVDT() {
if (ViewBlockLayoutWithBFI != GVDT_None)
return ViewBlockLayoutWithBFI;
@@ -185,6 +193,11 @@
F.getName().equals(ViewBlockFreqFuncName))) {
view("MachineBlockFrequencyDAGS." + F.getName());
}
+ if (PrintMachineBlockFreq &&
+ (PrintBlockFreqFuncName.empty() ||
+ F.getName().equals(PrintBlockFreqFuncName))) {
+ MBFI->print(dbgs());
+ }
}
bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {