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Use autogenerated mod/ref info for intrinsics.

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llvm-svn: 26670
This commit is contained in:
Chris Lattner 2006-03-09 22:31:29 +00:00
parent 67900dea61
commit f53321422d
1 changed files with 26 additions and 22 deletions
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48
lib/Analysis/BasicAliasAnalysis.cpp
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@ -741,12 +741,7 @@ namespace {
// Note that this list cannot contain libm functions (such as acos and sqrt)
// that set errno on a domain or other error.
static const char *DoesntAccessMemoryTable[] = {
// LLVM intrinsics:
"llvm.frameaddress", "llvm.returnaddress", "llvm.readport",
"llvm.isunordered", "llvm.sqrt", "llvm.bswap.i16", "llvm.bswap.i32",
"llvm.bswap.i64", "llvm.ctpop", "llvm.ctlz", "llvm.cttz",
static const char *DoesntAccessMemoryFns[] = {
"abs", "labs", "llabs", "imaxabs", "fabs", "fabsf", "fabsl",
"trunc", "truncf", "truncl", "ldexp",
@ -783,10 +778,8 @@ static const char *DoesntAccessMemoryTable[] = {
"__signbit", "__signbitf", "__signbitl",
};
static const unsigned DAMTableSize =
sizeof(DoesntAccessMemoryTable)/sizeof(DoesntAccessMemoryTable[0]);
static const char *OnlyReadsMemoryTable[] = {
static const char *OnlyReadsMemoryFns[] = {
"atoi", "atol", "atof", "atoll", "atoq", "a64l",
"bcmp", "memcmp", "memchr", "memrchr", "wmemcmp", "wmemchr",
@ -810,34 +803,45 @@ static const char *OnlyReadsMemoryTable[] = {
"feof_unlocked", "ferror_unlocked", "fileno_unlocked"
};
static const unsigned ORMTableSize =
sizeof(OnlyReadsMemoryTable)/sizeof(OnlyReadsMemoryTable[0]);
AliasAnalysis::ModRefBehavior
BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
std::vector<PointerAccessInfo> *Info) {
if (!F->isExternal()) return UnknownModRefBehavior;
static std::vector<const char*> NoMemoryTable, OnlyReadsMemoryTable;
static bool Initialized = false;
if (!Initialized) {
NoMemoryTable.insert(NoMemoryTable.end(),
DoesntAccessMemoryFns,
DoesntAccessMemoryFns+
sizeof(DoesntAccessMemoryFns)/sizeof(DoesntAccessMemoryFns[0]));
OnlyReadsMemoryTable.insert(OnlyReadsMemoryTable.end(),
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(DoesntAccessMemoryTable, DoesntAccessMemoryTable+DAMTableSize,
StringCompare());
std::sort(OnlyReadsMemoryTable, OnlyReadsMemoryTable+ORMTableSize,
std::sort(NoMemoryTable.begin(), NoMemoryTable.end(), StringCompare());
std::sort(OnlyReadsMemoryTable.begin(), OnlyReadsMemoryTable.end(),
StringCompare());
Initialized = true;
}
const char **Ptr = std::lower_bound(DoesntAccessMemoryTable,
DoesntAccessMemoryTable+DAMTableSize,
F->getName().c_str(), StringCompare());
if (Ptr != DoesntAccessMemoryTable+DAMTableSize && *Ptr == F->getName())
std::vector<const char*>::iterator Ptr =
std::lower_bound(NoMemoryTable.begin(), NoMemoryTable.end(),
F->getName().c_str(), StringCompare());
if (Ptr != NoMemoryTable.end() && *Ptr == F->getName())
return DoesNotAccessMemory;
Ptr = std::lower_bound(OnlyReadsMemoryTable,
OnlyReadsMemoryTable+ORMTableSize,
Ptr = std::lower_bound(OnlyReadsMemoryTable.begin(),
OnlyReadsMemoryTable.end(),
F->getName().c_str(), StringCompare());
if (Ptr != OnlyReadsMemoryTable+ORMTableSize && *Ptr == F->getName())
if (Ptr != OnlyReadsMemoryTable.end() && *Ptr == F->getName())
return OnlyReadsMemory;
return UnknownModRefBehavior;