[llvm] r344014 - [CFG Printer] Add support for writing the dot files with a custom
Chandler Carruth via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 8 21:30:23 PDT 2018
Author: chandlerc
Date: Mon Oct 8 21:30:23 2018
New Revision: 344014
URL: http://llvm.org/viewvc/llvm-project?rev=344014&view=rev
Log:
[CFG Printer] Add support for writing the dot files with a custom
prefix.
Use this to direct these files to a specific location in the test suite
so that we don't write files out to random directories (or fail if the
working directory isn't writable).
Modified:
llvm/trunk/lib/Analysis/CFGPrinter.cpp
llvm/trunk/test/Other/cfg-printer-branch-weights.ll
Modified: llvm/trunk/lib/Analysis/CFGPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/CFGPrinter.cpp?rev=344014&r1=344013&r2=344014&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/CFGPrinter.cpp (original)
+++ llvm/trunk/lib/Analysis/CFGPrinter.cpp Mon Oct 8 21:30:23 2018
@@ -7,9 +7,10 @@
//
//===----------------------------------------------------------------------===//
//
-// This file defines a '-dot-cfg' analysis pass, which emits the
-// cfg.<fnname>.dot file for each function in the program, with a graph of the
-// CFG for that function.
+// This file defines a `-dot-cfg` analysis pass, which emits the
+// `<prefix>.<fnname>.dot` file for each function in the program, with a graph
+// of the CFG for that function. The default value for `<prefix>` is `cfg` but
+// can be customized as needed.
//
// The other main feature of this file is that it implements the
// Function::viewCFG method, which is useful for debugging passes which operate
@@ -27,6 +28,10 @@ static cl::opt<std::string> CFGFuncName(
cl::desc("The name of a function (or its substring)"
" whose CFG is viewed/printed."));
+static cl::opt<std::string> CFGDotFilenamePrefix(
+ "cfg-dot-filename-prefix", cl::Hidden,
+ cl::desc("The prefix used for the CFG dot file names."));
+
namespace {
struct CFGViewerLegacyPass : public FunctionPass {
static char ID; // Pass identifcation, replacement for typeid
@@ -90,7 +95,8 @@ PreservedAnalyses CFGOnlyViewerPass::run
static void writeCFGToDotFile(Function &F, bool CFGOnly = false) {
if (!CFGFuncName.empty() && !F.getName().contains(CFGFuncName))
return;
- std::string Filename = ("cfg." + F.getName() + ".dot").str();
+ std::string Filename =
+ (CFGDotFilenamePrefix + "." + F.getName() + ".dot").str();
errs() << "Writing '" << Filename << "'...";
std::error_code EC;
Modified: llvm/trunk/test/Other/cfg-printer-branch-weights.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Other/cfg-printer-branch-weights.ll?rev=344014&r1=344013&r2=344014&view=diff
==============================================================================
--- llvm/trunk/test/Other/cfg-printer-branch-weights.ll (original)
+++ llvm/trunk/test/Other/cfg-printer-branch-weights.ll Mon Oct 8 21:30:23 2018
@@ -1,5 +1,5 @@
-;RUN: opt < %s -analyze -dot-cfg 2>/dev/null
-;RUN: FileCheck %s -input-file=cfg.f.dot
+;RUN: opt < %s -analyze -dot-cfg -cfg-dot-filename-prefix=%t 2>/dev/null
+;RUN: FileCheck %s -input-file=%t.f.dot
define void @f(i32) {
entry:
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