Ok, third time's the charm. No changes from last time except the CMake
source addition. Apparently the buildbots were wrong about failures.
---
Add some switches helpful for debugging:
-print-before=<Pass Name>
Dump IR before running pass <Pass Name>.
-print-before-all
Dump IR before running each pass.
-print-after-all
Dump IR after running each pass.
These are helpful when tracking down a miscompilation. It is easy to
get IR dumps and do diffs on them, etc.
To make this work well, add a new getPrinterPass API to Pass so that
each kind of pass (ModulePass, FunctionPass, etc.) can create a Pass
suitable for dumping out the kind of object the Pass works on.
llvm-svn: 100249
diff --git a/llvm/lib/VMCore/PrintModulePass.cpp b/llvm/lib/VMCore/PrintModulePass.cpp
index f0f6e7a..2d69dce 100644
--- a/llvm/lib/VMCore/PrintModulePass.cpp
+++ b/llvm/lib/VMCore/PrintModulePass.cpp
@@ -23,21 +23,22 @@
namespace {
class PrintModulePass : public ModulePass {
+ std::string Banner;
raw_ostream *Out; // raw_ostream to print on
bool DeleteStream; // Delete the ostream in our dtor?
public:
static char ID;
PrintModulePass() : ModulePass(&ID), Out(&dbgs()),
DeleteStream(false) {}
- PrintModulePass(raw_ostream *o, bool DS)
- : ModulePass(&ID), Out(o), DeleteStream(DS) {}
+ PrintModulePass(const std::string &B, raw_ostream *o, bool DS)
+ : ModulePass(&ID), Banner(B), Out(o), DeleteStream(DS) {}
~PrintModulePass() {
if (DeleteStream) delete Out;
}
bool runOnModule(Module &M) {
- (*Out) << M;
+ (*Out) << Banner << M;
return false;
}
@@ -85,8 +86,9 @@
/// createPrintModulePass - Create and return a pass that writes the
/// module to the specified raw_ostream.
ModulePass *llvm::createPrintModulePass(llvm::raw_ostream *OS,
- bool DeleteStream) {
- return new PrintModulePass(OS, DeleteStream);
+ bool DeleteStream,
+ const std::string &Banner) {
+ return new PrintModulePass(Banner, OS, DeleteStream);
}
/// createPrintFunctionPass - Create and return a pass that prints