#include "llvm/Support/IRBuilder.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Config/config.h"
+#include "llvm/Config/config.h" // FIXME: Shouldn't depend on host!
using namespace llvm;
STATISTIC(NumSimplified, "Number of library calls simplified");
protected:
Function *Caller;
const TargetData *TD;
+ const TargetLibraryInfo *TLI;
LLVMContext* Context;
public:
LibCallOptimization() { }
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B)
=0;
- Value *OptimizeCall(CallInst *CI, const TargetData *TD, IRBuilder<> &B) {
+ Value *OptimizeCall(CallInst *CI, const TargetData *TD,
+ const TargetLibraryInfo *TLI, IRBuilder<> &B) {
Caller = CI->getParent()->getParent();
this->TD = TD;
+ this->TLI = TLI;
if (CI->getCalledFunction())
Context = &CI->getCalledFunction()->getContext();
}
return true;
}
+
+static bool CallHasFloatingPointArgument(const CallInst *CI) {
+ for (CallInst::const_op_iterator it = CI->op_begin(), e = CI->op_end();
+ it != e; ++it) {
+ if ((*it)->getType()->isFloatingPointTy())
+ return true;
+ }
+ return false;
+}
/// IsOnlyUsedInEqualityComparison - Return true if it is only used in equality
/// comparisons with With.
}
// ffs(x) -> x != 0 ? (i32)llvm.cttz(x)+1 : 0
- const Type *ArgType = Op->getType();
+ Type *ArgType = Op->getType();
Value *F = Intrinsic::getDeclaration(Callee->getParent(),
Intrinsic::cttz, &ArgType, 1);
Value *V = B.CreateCall(F, Op, "cttz");
// 'printf' Optimizations
struct PrintFOpt : public LibCallOptimization {
- virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
- // Require one fixed pointer argument and an integer/void result.
- const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() < 1 || !FT->getParamType(0)->isPointerTy() ||
- !(FT->getReturnType()->isIntegerTy() ||
- FT->getReturnType()->isVoidTy()))
- return 0;
-
+ Value *OptimizeFixedFormatString(Function *Callee, CallInst *CI,
+ IRBuilder<> &B) {
// Check for a fixed format string.
std::string FormatStr;
if (!GetConstantStringInfo(CI->getArgOperand(0), FormatStr))
}
return 0;
}
+
+ virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // Require one fixed pointer argument and an integer/void result.
+ const FunctionType *FT = Callee->getFunctionType();
+ if (FT->getNumParams() < 1 || !FT->getParamType(0)->isPointerTy() ||
+ !(FT->getReturnType()->isIntegerTy() ||
+ FT->getReturnType()->isVoidTy()))
+ return 0;
+
+ if (Value *V = OptimizeFixedFormatString(Callee, CI, B)) {
+ return V;
+ }
+
+ // printf(format, ...) -> iprintf(format, ...) if no floating point
+ // arguments.
+ if (TLI->has(LibFunc::iprintf) && !CallHasFloatingPointArgument(CI)) {
+ Module *M = B.GetInsertBlock()->getParent()->getParent();
+ Constant *IPrintFFn =
+ M->getOrInsertFunction("iprintf", FT, Callee->getAttributes());
+ CallInst *New = cast<CallInst>(CI->clone());
+ New->setCalledFunction(IPrintFFn);
+ B.Insert(New);
+ return New;
+ }
+ return 0;
+ }
};
//===---------------------------------------===//
// 'sprintf' Optimizations
struct SPrintFOpt : public LibCallOptimization {
- virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
- // Require two fixed pointer arguments and an integer result.
- const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
- !FT->getParamType(1)->isPointerTy() ||
- !FT->getReturnType()->isIntegerTy())
- return 0;
-
+ Value *OptimizeFixedFormatString(Function *Callee, CallInst *CI,
+ IRBuilder<> &B) {
// Check for a fixed format string.
std::string FormatStr;
if (!GetConstantStringInfo(CI->getArgOperand(1), FormatStr))
}
return 0;
}
+
+ virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // Require two fixed pointer arguments and an integer result.
+ const FunctionType *FT = Callee->getFunctionType();
+ if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isPointerTy() ||
+ !FT->getReturnType()->isIntegerTy())
+ return 0;
+
+ if (Value *V = OptimizeFixedFormatString(Callee, CI, B)) {
+ return V;
+ }
+
+ // sprintf(str, format, ...) -> siprintf(str, format, ...) if no floating
+ // point arguments.
+ if (TLI->has(LibFunc::siprintf) && !CallHasFloatingPointArgument(CI)) {
+ Module *M = B.GetInsertBlock()->getParent()->getParent();
+ Constant *SIPrintFFn =
+ M->getOrInsertFunction("siprintf", FT, Callee->getAttributes());
+ CallInst *New = cast<CallInst>(CI->clone());
+ New->setCalledFunction(SIPrintFFn);
+ B.Insert(New);
+ return New;
+ }
+ return 0;
+ }
};
//===---------------------------------------===//
// 'fprintf' Optimizations
struct FPrintFOpt : public LibCallOptimization {
- virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
- // Require two fixed paramters as pointers and integer result.
- const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
- !FT->getParamType(1)->isPointerTy() ||
- !FT->getReturnType()->isIntegerTy())
- return 0;
-
+ Value *OptimizeFixedFormatString(Function *Callee, CallInst *CI,
+ IRBuilder<> &B) {
// All the optimizations depend on the format string.
std::string FormatStr;
if (!GetConstantStringInfo(CI->getArgOperand(1), FormatStr))
}
return 0;
}
+
+ virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // Require two fixed paramters as pointers and integer result.
+ const FunctionType *FT = Callee->getFunctionType();
+ if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isPointerTy() ||
+ !FT->getReturnType()->isIntegerTy())
+ return 0;
+
+ if (Value *V = OptimizeFixedFormatString(Callee, CI, B)) {
+ return V;
+ }
+
+ // fprintf(stream, format, ...) -> fiprintf(stream, format, ...) if no
+ // floating point arguments.
+ if (TLI->has(LibFunc::fiprintf) && !CallHasFloatingPointArgument(CI)) {
+ Module *M = B.GetInsertBlock()->getParent()->getParent();
+ Constant *FIPrintFFn =
+ M->getOrInsertFunction("fiprintf", FT, Callee->getAttributes());
+ CallInst *New = cast<CallInst>(CI->clone());
+ New->setCalledFunction(FIPrintFFn);
+ B.Insert(New);
+ return New;
+ }
+ return 0;
+ }
};
//===---------------------------------------===//
/// This pass optimizes well known library functions from libc and libm.
///
class SimplifyLibCalls : public FunctionPass {
+ TargetLibraryInfo *TLI;
+
StringMap<LibCallOptimization*> Optimizations;
// String and Memory LibCall Optimizations
StrCatOpt StrCat; StrNCatOpt StrNCat; StrChrOpt StrChr; StrRChrOpt StrRChr;
SPrintFOpt SPrintF; PrintFOpt PrintF;
FWriteOpt FWrite; FPutsOpt FPuts; FPrintFOpt FPrintF;
PutsOpt Puts;
-
+
bool Modified; // This is only used by doInitialization.
public:
static char ID; // Pass identification
void setDoesNotAlias(Function &F, unsigned n);
bool doInitialization(Module &M);
+ void inferPrototypeAttributes(Function &F);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequired<TargetLibraryInfo>();
}
};
- char SimplifyLibCalls::ID = 0;
} // end anonymous namespace.
-INITIALIZE_PASS(SimplifyLibCalls, "simplify-libcalls",
- "Simplify well-known library calls", false, false)
+char SimplifyLibCalls::ID = 0;
+
+INITIALIZE_PASS_BEGIN(SimplifyLibCalls, "simplify-libcalls",
+ "Simplify well-known library calls", false, false)
+INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfo)
+INITIALIZE_PASS_END(SimplifyLibCalls, "simplify-libcalls",
+ "Simplify well-known library calls", false, false)
// Public interface to the Simplify LibCalls pass.
FunctionPass *llvm::createSimplifyLibCallsPass() {
Optimizations["strcspn"] = &StrCSpn;
Optimizations["strstr"] = &StrStr;
Optimizations["memcmp"] = &MemCmp;
- Optimizations["memcpy"] = &MemCpy;
+ if (TLI->has(LibFunc::memcpy)) Optimizations["memcpy"] = &MemCpy;
Optimizations["memmove"] = &MemMove;
- Optimizations["memset"] = &MemSet;
+ if (TLI->has(LibFunc::memset)) Optimizations["memset"] = &MemSet;
// _chk variants of String and Memory LibCall Optimizations.
Optimizations["__strcpy_chk"] = &StrCpyChk;
/// runOnFunction - Top level algorithm.
///
bool SimplifyLibCalls::runOnFunction(Function &F) {
+ TLI = &getAnalysis<TargetLibraryInfo>();
+
if (Optimizations.empty())
InitOptimizations();
// Set the builder to the instruction after the call.
Builder.SetInsertPoint(BB, I);
+ // Use debug location of CI for all new instructions.
+ Builder.SetCurrentDebugLocation(CI->getDebugLoc());
+
// Try to optimize this call.
- Value *Result = LCO->OptimizeCall(CI, TD, Builder);
+ Value *Result = LCO->OptimizeCall(CI, TD, TLI, Builder);
if (Result == 0) continue;
DEBUG(dbgs() << "SimplifyLibCalls simplified: " << *CI;
}
}
+
+void SimplifyLibCalls::inferPrototypeAttributes(Function &F) {
+ const FunctionType *FTy = F.getFunctionType();
+
+ StringRef Name = F.getName();
+ switch (Name[0]) {
+ case 's':
+ if (Name == "strlen") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "strchr" ||
+ Name == "strrchr") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isIntegerTy())
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ } else if (Name == "strcpy" ||
+ Name == "stpcpy" ||
+ Name == "strcat" ||
+ Name == "strtol" ||
+ Name == "strtod" ||
+ Name == "strtof" ||
+ Name == "strtoul" ||
+ Name == "strtoll" ||
+ Name == "strtold" ||
+ Name == "strncat" ||
+ Name == "strncpy" ||
+ Name == "strtoull") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "strxfrm") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "strcmp" ||
+ Name == "strspn" ||
+ Name == "strncmp" ||
+ Name == "strcspn" ||
+ Name == "strcoll" ||
+ Name == "strcasecmp" ||
+ Name == "strncasecmp") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "strstr" ||
+ Name == "strpbrk") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "strtok" ||
+ Name == "strtok_r") {
+ if (FTy->getNumParams() < 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "scanf" ||
+ Name == "setbuf" ||
+ Name == "setvbuf") {
+ if (FTy->getNumParams() < 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "strdup" ||
+ Name == "strndup") {
+ if (FTy->getNumParams() < 1 || !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "stat" ||
+ Name == "sscanf" ||
+ Name == "sprintf" ||
+ Name == "statvfs") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "snprintf") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(2)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 3);
+ } else if (Name == "setitimer") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(1)->isPointerTy() ||
+ !FTy->getParamType(2)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ setDoesNotCapture(F, 3);
+ } else if (Name == "system") {
+ if (FTy->getNumParams() != 1 ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ // May throw; "system" is a valid pthread cancellation point.
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'm':
+ if (Name == "malloc") {
+ if (FTy->getNumParams() != 1 ||
+ !FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "memcmp") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "memchr" ||
+ Name == "memrchr") {
+ if (FTy->getNumParams() != 3)
+ return;
+ setOnlyReadsMemory(F);
+ setDoesNotThrow(F);
+ } else if (Name == "modf" ||
+ Name == "modff" ||
+ Name == "modfl" ||
+ Name == "memcpy" ||
+ Name == "memccpy" ||
+ Name == "memmove") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "memalign") {
+ if (!FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotAlias(F, 0);
+ } else if (Name == "mkdir" ||
+ Name == "mktime") {
+ if (FTy->getNumParams() == 0 ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'r':
+ if (Name == "realloc") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "read") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ // May throw; "read" is a valid pthread cancellation point.
+ setDoesNotCapture(F, 2);
+ } else if (Name == "rmdir" ||
+ Name == "rewind" ||
+ Name == "remove" ||
+ Name == "realpath") {
+ if (FTy->getNumParams() < 1 ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "rename" ||
+ Name == "readlink") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ }
+ break;
+ case 'w':
+ if (Name == "write") {
+ if (FTy->getNumParams() != 3 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ // May throw; "write" is a valid pthread cancellation point.
+ setDoesNotCapture(F, 2);
+ }
+ break;
+ case 'b':
+ if (Name == "bcopy") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "bcmp") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setOnlyReadsMemory(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "bzero") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'c':
+ if (Name == "calloc") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "chmod" ||
+ Name == "chown" ||
+ Name == "ctermid" ||
+ Name == "clearerr" ||
+ Name == "closedir") {
+ if (FTy->getNumParams() == 0 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'a':
+ if (Name == "atoi" ||
+ Name == "atol" ||
+ Name == "atof" ||
+ Name == "atoll") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setOnlyReadsMemory(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "access") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'f':
+ if (Name == "fopen") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "fdopen") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "feof" ||
+ Name == "free" ||
+ Name == "fseek" ||
+ Name == "ftell" ||
+ Name == "fgetc" ||
+ Name == "fseeko" ||
+ Name == "ftello" ||
+ Name == "fileno" ||
+ Name == "fflush" ||
+ Name == "fclose" ||
+ Name == "fsetpos" ||
+ Name == "flockfile" ||
+ Name == "funlockfile" ||
+ Name == "ftrylockfile") {
+ if (FTy->getNumParams() == 0 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "ferror") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setOnlyReadsMemory(F);
+ } else if (Name == "fputc" ||
+ Name == "fstat" ||
+ Name == "frexp" ||
+ Name == "frexpf" ||
+ Name == "frexpl" ||
+ Name == "fstatvfs") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "fgets") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(2)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 3);
+ } else if (Name == "fread" ||
+ Name == "fwrite") {
+ if (FTy->getNumParams() != 4 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(3)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 4);
+ } else if (Name == "fputs" ||
+ Name == "fscanf" ||
+ Name == "fprintf" ||
+ Name == "fgetpos") {
+ if (FTy->getNumParams() < 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ }
+ break;
+ case 'g':
+ if (Name == "getc" ||
+ Name == "getlogin_r" ||
+ Name == "getc_unlocked") {
+ if (FTy->getNumParams() == 0 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "getenv") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setOnlyReadsMemory(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "gets" ||
+ Name == "getchar") {
+ setDoesNotThrow(F);
+ } else if (Name == "getitimer") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "getpwnam") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'u':
+ if (Name == "ungetc") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "uname" ||
+ Name == "unlink" ||
+ Name == "unsetenv") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "utime" ||
+ Name == "utimes") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ }
+ break;
+ case 'p':
+ if (Name == "putc") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "puts" ||
+ Name == "printf" ||
+ Name == "perror") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "pread" ||
+ Name == "pwrite") {
+ if (FTy->getNumParams() != 4 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ // May throw; these are valid pthread cancellation points.
+ setDoesNotCapture(F, 2);
+ } else if (Name == "putchar") {
+ setDoesNotThrow(F);
+ } else if (Name == "popen") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "pclose") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'v':
+ if (Name == "vscanf") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "vsscanf" ||
+ Name == "vfscanf") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(1)->isPointerTy() ||
+ !FTy->getParamType(2)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "valloc") {
+ if (!FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "vprintf") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "vfprintf" ||
+ Name == "vsprintf") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "vsnprintf") {
+ if (FTy->getNumParams() != 4 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(2)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 3);
+ }
+ break;
+ case 'o':
+ if (Name == "open") {
+ if (FTy->getNumParams() < 2 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ // May throw; "open" is a valid pthread cancellation point.
+ setDoesNotCapture(F, 1);
+ } else if (Name == "opendir") {
+ if (FTy->getNumParams() != 1 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 't':
+ if (Name == "tmpfile") {
+ if (!FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "times") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'h':
+ if (Name == "htonl" ||
+ Name == "htons") {
+ setDoesNotThrow(F);
+ setDoesNotAccessMemory(F);
+ }
+ break;
+ case 'n':
+ if (Name == "ntohl" ||
+ Name == "ntohs") {
+ setDoesNotThrow(F);
+ setDoesNotAccessMemory(F);
+ }
+ break;
+ case 'l':
+ if (Name == "lstat") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "lchown") {
+ if (FTy->getNumParams() != 3 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ case 'q':
+ if (Name == "qsort") {
+ if (FTy->getNumParams() != 4 || !FTy->getParamType(3)->isPointerTy())
+ return;
+ // May throw; places call through function pointer.
+ setDoesNotCapture(F, 4);
+ }
+ break;
+ case '_':
+ if (Name == "__strdup" ||
+ Name == "__strndup") {
+ if (FTy->getNumParams() < 1 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "__strtok_r") {
+ if (FTy->getNumParams() != 3 ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "_IO_getc") {
+ if (FTy->getNumParams() != 1 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "_IO_putc") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ }
+ break;
+ case 1:
+ if (Name == "\1__isoc99_scanf") {
+ if (FTy->getNumParams() < 1 ||
+ !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "\1stat64" ||
+ Name == "\1lstat64" ||
+ Name == "\1statvfs64" ||
+ Name == "\1__isoc99_sscanf") {
+ if (FTy->getNumParams() < 1 ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "\1fopen64") {
+ if (FTy->getNumParams() != 2 ||
+ !FTy->getReturnType()->isPointerTy() ||
+ !FTy->getParamType(0)->isPointerTy() ||
+ !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ setDoesNotCapture(F, 1);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "\1fseeko64" ||
+ Name == "\1ftello64") {
+ if (FTy->getNumParams() == 0 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 1);
+ } else if (Name == "\1tmpfile64") {
+ if (!FTy->getReturnType()->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "\1fstat64" ||
+ Name == "\1fstatvfs64") {
+ if (FTy->getNumParams() != 2 || !FTy->getParamType(1)->isPointerTy())
+ return;
+ setDoesNotThrow(F);
+ setDoesNotCapture(F, 2);
+ } else if (Name == "\1open64") {
+ if (FTy->getNumParams() < 2 || !FTy->getParamType(0)->isPointerTy())
+ return;
+ // May throw; "open" is a valid pthread cancellation point.
+ setDoesNotCapture(F, 1);
+ }
+ break;
+ }
+}
+
/// doInitialization - Add attributes to well-known functions.
///
bool SimplifyLibCalls::doInitialization(Module &M) {
Modified = false;
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
Function &F = *I;
- if (!F.isDeclaration())
- continue;
-
- if (!F.hasName())
- continue;
-
- const FunctionType *FTy = F.getFunctionType();
-
- StringRef Name = F.getName();
- switch (Name[0]) {
- case 's':
- if (Name == "strlen") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "strchr" ||
- Name == "strrchr") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isIntegerTy())
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- } else if (Name == "strcpy" ||
- Name == "stpcpy" ||
- Name == "strcat" ||
- Name == "strtol" ||
- Name == "strtod" ||
- Name == "strtof" ||
- Name == "strtoul" ||
- Name == "strtoll" ||
- Name == "strtold" ||
- Name == "strncat" ||
- Name == "strncpy" ||
- Name == "strtoull") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "strxfrm") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "strcmp" ||
- Name == "strspn" ||
- Name == "strncmp" ||
- Name == "strcspn" ||
- Name == "strcoll" ||
- Name == "strcasecmp" ||
- Name == "strncasecmp") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "strstr" ||
- Name == "strpbrk") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "strtok" ||
- Name == "strtok_r") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "scanf" ||
- Name == "setbuf" ||
- Name == "setvbuf") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "strdup" ||
- Name == "strndup") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- } else if (Name == "stat" ||
- Name == "sscanf" ||
- Name == "sprintf" ||
- Name == "statvfs") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "snprintf") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(2)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 3);
- } else if (Name == "setitimer") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(1)->isPointerTy() ||
- !FTy->getParamType(2)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- setDoesNotCapture(F, 3);
- } else if (Name == "system") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- // May throw; "system" is a valid pthread cancellation point.
- setDoesNotCapture(F, 1);
- }
- break;
- case 'm':
- if (Name == "malloc") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- } else if (Name == "memcmp") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "memchr" ||
- Name == "memrchr") {
- if (FTy->getNumParams() != 3)
- continue;
- setOnlyReadsMemory(F);
- setDoesNotThrow(F);
- } else if (Name == "modf" ||
- Name == "modff" ||
- Name == "modfl" ||
- Name == "memcpy" ||
- Name == "memccpy" ||
- Name == "memmove") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "memalign") {
- if (!FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotAlias(F, 0);
- } else if (Name == "mkdir" ||
- Name == "mktime") {
- if (FTy->getNumParams() == 0 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'r':
- if (Name == "realloc") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- } else if (Name == "read") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- // May throw; "read" is a valid pthread cancellation point.
- setDoesNotCapture(F, 2);
- } else if (Name == "rmdir" ||
- Name == "rewind" ||
- Name == "remove" ||
- Name == "realpath") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "rename" ||
- Name == "readlink") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- }
- break;
- case 'w':
- if (Name == "write") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- // May throw; "write" is a valid pthread cancellation point.
- setDoesNotCapture(F, 2);
- }
- break;
- case 'b':
- if (Name == "bcopy") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "bcmp") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setOnlyReadsMemory(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "bzero") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'c':
- if (Name == "calloc") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- } else if (Name == "chmod" ||
- Name == "chown" ||
- Name == "ctermid" ||
- Name == "clearerr" ||
- Name == "closedir") {
- if (FTy->getNumParams() == 0 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'a':
- if (Name == "atoi" ||
- Name == "atol" ||
- Name == "atof" ||
- Name == "atoll") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setOnlyReadsMemory(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "access") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'f':
- if (Name == "fopen") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "fdopen") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 2);
- } else if (Name == "feof" ||
- Name == "free" ||
- Name == "fseek" ||
- Name == "ftell" ||
- Name == "fgetc" ||
- Name == "fseeko" ||
- Name == "ftello" ||
- Name == "fileno" ||
- Name == "fflush" ||
- Name == "fclose" ||
- Name == "fsetpos" ||
- Name == "flockfile" ||
- Name == "funlockfile" ||
- Name == "ftrylockfile") {
- if (FTy->getNumParams() == 0 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "ferror") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setOnlyReadsMemory(F);
- } else if (Name == "fputc" ||
- Name == "fstat" ||
- Name == "frexp" ||
- Name == "frexpf" ||
- Name == "frexpl" ||
- Name == "fstatvfs") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "fgets") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(2)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 3);
- } else if (Name == "fread" ||
- Name == "fwrite") {
- if (FTy->getNumParams() != 4 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(3)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 4);
- } else if (Name == "fputs" ||
- Name == "fscanf" ||
- Name == "fprintf" ||
- Name == "fgetpos") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- }
- break;
- case 'g':
- if (Name == "getc" ||
- Name == "getlogin_r" ||
- Name == "getc_unlocked") {
- if (FTy->getNumParams() == 0 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "getenv") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setOnlyReadsMemory(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "gets" ||
- Name == "getchar") {
- setDoesNotThrow(F);
- } else if (Name == "getitimer") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "getpwnam") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'u':
- if (Name == "ungetc") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "uname" ||
- Name == "unlink" ||
- Name == "unsetenv") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "utime" ||
- Name == "utimes") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- }
- break;
- case 'p':
- if (Name == "putc") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "puts" ||
- Name == "printf" ||
- Name == "perror") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "pread" ||
- Name == "pwrite") {
- if (FTy->getNumParams() != 4 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- // May throw; these are valid pthread cancellation points.
- setDoesNotCapture(F, 2);
- } else if (Name == "putchar") {
- setDoesNotThrow(F);
- } else if (Name == "popen") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "pclose") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'v':
- if (Name == "vscanf") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "vsscanf" ||
- Name == "vfscanf") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(1)->isPointerTy() ||
- !FTy->getParamType(2)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "valloc") {
- if (!FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- } else if (Name == "vprintf") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "vfprintf" ||
- Name == "vsprintf") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "vsnprintf") {
- if (FTy->getNumParams() != 4 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(2)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 3);
- }
- break;
- case 'o':
- if (Name == "open") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- // May throw; "open" is a valid pthread cancellation point.
- setDoesNotCapture(F, 1);
- } else if (Name == "opendir") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- }
- break;
- case 't':
- if (Name == "tmpfile") {
- if (!FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- } else if (Name == "times") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'h':
- if (Name == "htonl" ||
- Name == "htons") {
- setDoesNotThrow(F);
- setDoesNotAccessMemory(F);
- }
- break;
- case 'n':
- if (Name == "ntohl" ||
- Name == "ntohs") {
- setDoesNotThrow(F);
- setDoesNotAccessMemory(F);
- }
- break;
- case 'l':
- if (Name == "lstat") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "lchown") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- }
- break;
- case 'q':
- if (Name == "qsort") {
- if (FTy->getNumParams() != 4 ||
- !FTy->getParamType(3)->isPointerTy())
- continue;
- // May throw; places call through function pointer.
- setDoesNotCapture(F, 4);
- }
- break;
- case '_':
- if (Name == "__strdup" ||
- Name == "__strndup") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- } else if (Name == "__strtok_r") {
- if (FTy->getNumParams() != 3 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "_IO_getc") {
- if (FTy->getNumParams() != 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "_IO_putc") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- }
- break;
- case 1:
- if (Name == "\1__isoc99_scanf") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "\1stat64" ||
- Name == "\1lstat64" ||
- Name == "\1statvfs64" ||
- Name == "\1__isoc99_sscanf") {
- if (FTy->getNumParams() < 1 ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "\1fopen64") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getReturnType()->isPointerTy() ||
- !FTy->getParamType(0)->isPointerTy() ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- setDoesNotCapture(F, 1);
- setDoesNotCapture(F, 2);
- } else if (Name == "\1fseeko64" ||
- Name == "\1ftello64") {
- if (FTy->getNumParams() == 0 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 1);
- } else if (Name == "\1tmpfile64") {
- if (!FTy->getReturnType()->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotAlias(F, 0);
- } else if (Name == "\1fstat64" ||
- Name == "\1fstatvfs64") {
- if (FTy->getNumParams() != 2 ||
- !FTy->getParamType(1)->isPointerTy())
- continue;
- setDoesNotThrow(F);
- setDoesNotCapture(F, 2);
- } else if (Name == "\1open64") {
- if (FTy->getNumParams() < 2 ||
- !FTy->getParamType(0)->isPointerTy())
- continue;
- // May throw; "open" is a valid pthread cancellation point.
- setDoesNotCapture(F, 1);
- }
- break;
- }
+ if (F.isDeclaration() && F.hasName())
+ inferPrototypeAttributes(F);
}
return Modified;
}
projects / oota-llvm.git / blobdiff