#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/IR/CallSite.h"
+#include "llvm/IR/DataLayout.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/ErrorHandling.h"
MemDerefPrinter() : FunctionPass(ID) {
initializeMemDerefPrinterPass(*PassRegistry::getPassRegistry());
}
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.addRequired<DataLayoutPass>();
+ AU.setPreservesAll();
+ }
bool runOnFunction(Function &F) override;
void print(raw_ostream &OS, const Module * = nullptr) const override;
void releaseMemory() override {
}
char MemDerefPrinter::ID = 0;
-INITIALIZE_PASS(MemDerefPrinter, "print-memderefs",
- "Memory Dereferenciblity of pointers in function", false, true)
+INITIALIZE_PASS_BEGIN(MemDerefPrinter, "print-memderefs",
+ "Memory Dereferenciblity of pointers in function", false, true)
+INITIALIZE_PASS_DEPENDENCY(DataLayoutPass)
+INITIALIZE_PASS_END(MemDerefPrinter, "print-memderefs",
+ "Memory Dereferenciblity of pointers in function", false, true)
FunctionPass *llvm::createMemDerefPrinter() {
return new MemDerefPrinter();
}
bool MemDerefPrinter::runOnFunction(Function &F) {
+ const DataLayout *DL = &getAnalysis<DataLayoutPass>().getDataLayout();
for (auto &I: inst_range(F)) {
if (LoadInst *LI = dyn_cast<LoadInst>(&I)) {
Value *PO = LI->getPointerOperand();
- if (PO->isDereferenceablePointer(nullptr))
+ if (PO->isDereferenceablePointer(DL))
Vec.push_back(PO);
}
}
; Uses the print-deref (+ analyze to print) pass to run
; isDereferenceablePointer() on many load instruction operands
+target datalayout = "e"
+
declare zeroext i1 @return_i1()
@globalstr = global [6 x i8] c"hello\00"
-define void @test(i32 addrspace(1)* byval %dparam) {
+define void @test(i32 addrspace(1)* dereferenceable(8) %dparam) {
; CHECK: The following are dereferenceable:
; CHECK: %globalptr
; CHECK: %alloca