6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-18 12:29:27 +00:00
Code Issues Projects Releases Wiki Activity

Fix the build, and fix the handling of pointer sizes.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38494 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-07-10 17:25:03 +00:00
parent 6b278fc786
commit 7a616a1012
1 changed files with 19 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
lib/Analysis/MemoryDependenceAnalysis.cpp
View File

@ -15,6 +15,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Constants.h"
#include "llvm/Instructions.h"
#include "llvm/Function.h"
#include "llvm/Analysis/AliasAnalysis.h"
@ -67,22 +68,18 @@ Instruction* MemoryDependenceAnalysis::getDependency(Instruction* query,
uint64_t dependeeSize = 0;
if (StoreInst* S = dyn_cast<StoreInst>(QI)) {
dependee = S->getPointerOperand();
dependeeSize = TD.getTypeSize(dependee->getType());
dependeeSize = TD.getTypeSize(S->getOperand(0)->getType());
} else if (LoadInst* L = dyn_cast<LoadInst>(QI)) {
dependee = L->getPointerOperand();
dependeeSize = TD.getTypeSize(dependee->getType());
dependeeSize = TD.getTypeSize(L->getType());
} else if (FreeInst* F = dyn_cast<FreeInst>(QI)) {
dependee = F->getPointerOperand();
// FreeInsts erase the entire structure, not just a field
dependeeSize = ~0UL;
} else if (isa<AllocationInst>(query)) {
// Allocations don't depend on anything
depGraphLocal.insert(std::make_pair(query, std::make_pair(None,
true)));
reverseDep.insert(std::make_pair(None, query));
} else if (isa<AllocationInst>(query))
return None;
} else
else
// FIXME: Call/InvokeInsts need proper handling
return None;
@ -92,26 +89,19 @@ Instruction* MemoryDependenceAnalysis::getDependency(Instruction* query,
while (QI != blockBegin) {
--QI;
// If we've reached the pointer's definition...
if (QI == dependee) {
depGraphLocal.insert(std::make_pair(query, std::make_pair(QI, true)));
reverseDep.insert(std::make_pair(QI, query));
return QI;
}
// If this inst is a memory op, get the pointer it accessed
Value* pointer = 0;
uint64_t pointerSize = 0;
if (StoreInst* S = dyn_cast<StoreInst>(QI)) {
pointer = S->getPointerOperand();
pointerSize = TD.getTypeSize(pointer->getType());
pointerSize = TD.getTypeSize(S->getOperand(0)->getType());
} else if (LoadInst* L = dyn_cast<LoadInst>(QI)) {
pointer = L->getPointerOperand();
pointerSize = TD.getTypeSize(pointer->getType());
pointerSize = TD.getTypeSize(L->getType());
} else if (AllocationInst* AI = dyn_cast<AllocationInst>(QI)) {
pointer = AI;
if (isa<ConstantInt>(AI->getArraySize()))
pointerSize = AI->getZExtValue();
if (ConstantInt* C = dyn_cast<ConstantInt>(AI->getArraySize()))
pointerSize = C->getZExtValue();
else
pointerSize = ~0UL;
} else if (FreeInst* F = dyn_cast<FreeInst>(QI)) {
@ -119,7 +109,7 @@ Instruction* MemoryDependenceAnalysis::getDependency(Instruction* query,
// FreeInsts erase the entire structure
pointerSize = ~0UL;
} else if (CallSite* C = dyn_cast<CallSite>(QI)) {
} else if (CallInst* C = dyn_cast<CallInst>(QI)) {
// Call insts need special handling. Check is they can modify our pointer
if (AA.getModRefInfo(C, dependee, dependeeSize) != AliasAnalysis::NoModRef) {
depGraphLocal.insert(std::make_pair(query, std::make_pair(C, true)));
@ -128,6 +118,15 @@ Instruction* MemoryDependenceAnalysis::getDependency(Instruction* query,
} else {
continue;
}
} else if (InvokeInst* I = dyn_cast<InvokeInst>(QI)) {
// Invoke insts need special handling. Check is they can modify our pointer
if (AA.getModRefInfo(I, dependee, dependeeSize) != AliasAnalysis::NoModRef) {
depGraphLocal.insert(std::make_pair(query, std::make_pair(I, true)));
reverseDep.insert(std::make_pair(I, query));
return I;
} else {
continue;
}
}
// If we found a pointer, check if it could be the same as our pointer