Changes in directory llvm/lib/Transforms/IPO:
StripDeadPrototypes.cpp updated: 1.3 -> 1.4
---
Log message:
simplify pass, delete dead gvar protos as well.
---
Diffs of the changes: (+21 -16)
StripDeadPrototypes.cpp | 37 +++++++++++++++++++++----------------
1 files changed, 21 insertions(+), 16 deletions(-)
Index: llvm/lib/Transforms/IPO/StripDeadPrototypes.cpp
diff -u llvm/lib/Transforms/IPO/StripDeadPrototypes.cpp:1.3
llvm/lib/Transforms/IPO/StripDeadPrototypes.cpp:1.4
--- llvm/lib/Transforms/IPO/StripDeadPrototypes.cpp:1.3 Mon Feb 5 15:47:39 2007
+++ llvm/lib/Transforms/IPO/StripDeadPrototypes.cpp Sun Feb 18 16:10:34 2007
@@ -12,13 +12,12 @@
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "strip-dead-prototypes"
#include "llvm/Transforms/IPO.h"
#include "llvm/Pass.h"
#include "llvm/Module.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/Support/Debug.h"
#include "llvm/Support/Compiler.h"
-#include <vector>
using namespace llvm;
STATISTIC(NumDeadPrototypes, "Number of dead prototypes removed");
@@ -37,24 +36,30 @@
} // end anonymous namespace
bool StripDeadPrototypesPass::runOnModule(Module &M) {
- // Collect all the functions we want to erase
- std::vector<Function*> FuncsToErase;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (I->isDeclaration() && // Function must be only a prototype
- I->use_empty()) { // Function must not be used
- FuncsToErase.push_back(&(*I));
+ bool MadeChange = false;
+
+ // Erase dead function prototypes.
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ) {
+ Function *F = I++;
+ // Function must be a prototype and unused.
+ if (F->isDeclaration() && F->use_empty()) {
+ F->eraseFromParent();
+ ++NumDeadPrototypes;
+ MadeChange = true;
}
+ }
- // Erase the functions
- for (std::vector<Function*>::iterator I = FuncsToErase.begin(),
- E = FuncsToErase.end(); I != E; ++I )
- (*I)->eraseFromParent();
+ // Erase dead function prototypes.
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ) {
+ GlobalVariable *GV = I++;
+ // Global must be a prototype and unused.
+ if (GV->isDeclaration() && GV->use_empty())
+ GV->eraseFromParent();
+ }
- // Increment the statistic
- NumDeadPrototypes += FuncsToErase.size();
-
// Return an indication of whether we changed anything or not.
- return !FuncsToErase.empty();
+ return MadeChange;
}
ModulePass *llvm::createStripDeadPrototypesPass() {
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