6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

This resolves a regression of BasicAA which failed to find any memory information for overloaded intrinsics (PR1600). This resolves that issue, and improves the matching scheme to use a BitVector rather than a binary search.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40872 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2007-08-06 20:57:16 +00:00
parent b1183c1ff3
commit a583990ec8
3 changed files with 42 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
lib/Analysis/BasicAliasAnalysis.cpp
View File

@@ -21,10 +21,12 @@
#include "llvm/ParameterAttributes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/Intrinsics.h"
#include "llvm/Pass.h"
#include "llvm/Target/TargetData.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/ManagedStatic.h"
@@ -874,6 +876,9 @@ static const char *OnlyReadsMemoryFns[] = {
static ManagedStatic<std::vector<const char*> > NoMemoryTable;
static ManagedStatic<std::vector<const char*> > OnlyReadsMemoryTable;
static ManagedStatic<BitVector> NoMemoryIntrinsics;
static ManagedStatic<BitVector> OnlyReadsMemoryIntrinsics;
AliasAnalysis::ModRefBehavior
BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
@@ -891,16 +896,30 @@ BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
OnlyReadsMemoryFns,
OnlyReadsMemoryFns+
sizeof(OnlyReadsMemoryFns)/sizeof(OnlyReadsMemoryFns[0]));
#define GET_MODREF_BEHAVIOR
#include "llvm/Intrinsics.gen"
#undef GET_MODREF_BEHAVIOR
// Sort the table the first time through.
std::sort(NoMemoryTable->begin(), NoMemoryTable->end(), StringCompare());
std::sort(OnlyReadsMemoryTable->begin(), OnlyReadsMemoryTable->end(),
StringCompare());
NoMemoryIntrinsics->resize(Intrinsic::num_intrinsics);
OnlyReadsMemoryIntrinsics->resize(Intrinsic::num_intrinsics);
#define GET_MODREF_BEHAVIOR
#include "llvm/Intrinsics.gen"
#undef GET_MODREF_BEHAVIOR
Initialized = true;
}
// If this is an intrinsic, we can use lookup tables
if (unsigned id = F->getIntrinsicID()) {
if (NoMemoryIntrinsics->test(id))
return DoesNotAccessMemory;
if (OnlyReadsMemoryIntrinsics->test(id))
return OnlyReadsMemory;
return UnknownModRefBehavior;
}
ValueName *Name = F->getValueName();
unsigned NameLen = Name->getKeyLength();