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Update the list of function annotations for nocapture. All of these came up

Browse Source 
when I was looking at functions used by python.

Highlights include, better largefile support (64-bit file sizes on 32-bit
systems), fputs string is nocapture, popen/pclose added (popen being noalias
return), modf and frexp and friends. Also added some missing 'break' statements
and combined identical sections.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64615 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-02-15 22:47:25 +00:00
parent 42cc8f140a
commit 225f747486
1 changed files with 187 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

235
lib/Transforms/Scalar/SimplifyLibCalls.cpp
View File

@ -255,12 +255,13 @@ void LibCallOptimization::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B) {
/// pointer and File is a pointer to FILE.
void LibCallOptimization::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B) {
Module *M = Caller->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(2, Attribute::NoCapture);
AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
Constant *F;
if (isa<PointerType>(File->getType()))
F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 2), Type::Int32Ty,
F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), Type::Int32Ty,
PointerType::getUnqual(Type::Int8Ty),
File->getType(), NULL);
else
@ -1655,14 +1656,6 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
} else if (NameLen == 6 && !strcmp(NameStr, "sscanf")) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if ((NameLen == 6 && !strcmp(NameStr, "strdup")) ||
(NameLen == 7 && !strcmp(NameStr, "strndup"))) {
if (FTy->getNumParams() < 1 ||
@ -1672,8 +1665,11 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
setDoesNotCapture(F, 1);
} else if (NameLen == 7 && !strcmp(NameStr, "sprintf")) {
if (FTy->getNumParams() != 2 ||
} else if ((NameLen == 4 && !strcmp(NameStr, "stat")) ||
(NameLen == 6 && !strcmp(NameStr, "sscanf")) ||
(NameLen == 7 && !strcmp(NameStr, "sprintf")) ||
(NameLen == 7 && !strcmp(NameStr, "statvfs"))) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
@ -1688,6 +1684,20 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 3);
} else if (NameLen == 9 && !strcmp(NameStr, "setitimer")) {
if (FTy->getNumParams() != 3 ||
!isa<PointerType>(FTy->getParamType(1)) ||
!isa<PointerType>(FTy->getParamType(2)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 2);
setDoesNotCapture(F, 3);
} else if (NameLen == 6 && !strcmp(NameStr, "system")) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
// May throw; "system" is a valid pthread cancellation point.
setDoesNotCapture(F, 1);
}
break;
case 'm':
@ -1706,10 +1716,13 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setOnlyReadsMemory(F);
setDoesNotThrow(F);
} else if ((NameLen == 6 && !strcmp(NameStr, "memcpy")) ||
} else if ((NameLen == 4 && !strcmp(NameStr, "modf")) ||
(NameLen == 5 && !strcmp(NameStr, "modff")) ||
(NameLen == 5 && !strcmp(NameStr, "modfl")) ||
(NameLen == 6 && !strcmp(NameStr, "memcpy")) ||
(NameLen == 7 && !strcmp(NameStr, "memccpy")) ||
(NameLen == 7 && !strcmp(NameStr, "memmove"))) {
if (FTy->getNumParams() < 3 ||
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
@ -1718,6 +1731,13 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
if (!isa<PointerType>(FTy->getReturnType()))
continue;
setDoesNotAlias(F, 0);
} else if ((NameLen == 5 && !strcmp(NameStr, "mkdir")) ||
(NameLen == 6 && !strcmp(NameStr, "mktime"))) {
if (FTy->getNumParams() == 0 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
}
break;
case 'r':
@ -1737,14 +1757,16 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotCapture(F, 2);
} else if ((NameLen == 5 && !strcmp(NameStr, "rmdir")) ||
(NameLen == 6 && !strcmp(NameStr, "rewind")) ||
(NameLen == 6 && !strcmp(NameStr, "remove"))) {
if (FTy->getNumParams() != 1 ||
(NameLen == 6 && !strcmp(NameStr, "remove")) ||
(NameLen == 8 && !strcmp(NameStr, "realpath"))) {
if (FTy->getNumParams() < 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
} else if (NameLen == 6 && !strcmp(NameStr, "rename")) {
if (FTy->getNumParams() != 2 ||
} else if ((NameLen == 6 && !strcmp(NameStr, "rename")) ||
(NameLen == 8 && !strcmp(NameStr, "readlink"))) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
@ -1795,7 +1817,9 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
} else if ((NameLen == 5 && !strcmp(NameStr, "chown")) ||
} else if ((NameLen == 5 && !strcmp(NameStr, "chmod")) ||
(NameLen == 5 && !strcmp(NameStr, "chown")) ||
(NameLen == 7 && !strcmp(NameStr, "ctermid")) ||
(NameLen == 8 && !strcmp(NameStr, "clearerr")) ||
(NameLen == 8 && !strcmp(NameStr, "closedir"))) {
if (FTy->getNumParams() == 0 ||
@ -1853,7 +1877,10 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
(NameLen == 6 && !strcmp(NameStr, "fileno")) ||
(NameLen == 6 && !strcmp(NameStr, "fflush")) ||
(NameLen == 6 && !strcmp(NameStr, "fclose")) ||
(NameLen == 7 && !strcmp(NameStr, "fsetpos"))) {
(NameLen == 7 && !strcmp(NameStr, "fsetpos")) ||
(NameLen == 9 && !strcmp(NameStr, "flockfile")) ||
(NameLen == 11 && !strcmp(NameStr, "funlockfile")) ||
(NameLen == 12 && !strcmp(NameStr, "ftrylockfile"))) {
if (FTy->getNumParams() == 0 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
@ -1867,7 +1894,11 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotCapture(F, 1);
setOnlyReadsMemory(F);
} else if ((NameLen == 5 && !strcmp(NameStr, "fputc")) ||
(NameLen == 5 && !strcmp(NameStr, "fputs"))) {
(NameLen == 5 && !strcmp(NameStr, "fstat")) ||
(NameLen == 5 && !strcmp(NameStr, "frexp")) ||
(NameLen == 6 && !strcmp(NameStr, "frexpf")) ||
(NameLen == 6 && !strcmp(NameStr, "frexpl")) ||
(NameLen == 8 && !strcmp(NameStr, "fstatvfs"))) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
@ -1889,15 +1920,10 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 4);
} else if (NameLen == 7 && !strcmp(NameStr, "fgetpos")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if (NameLen == 6 && !strcmp(NameStr, "fscanf")) {
} else if ((NameLen == 5 && !strcmp(NameStr, "fputs")) ||
(NameLen == 6 && !strcmp(NameStr, "fscanf")) ||
(NameLen == 7 && !strcmp(NameStr, "fprintf")) ||
(NameLen == 7 && !strcmp(NameStr, "fgetpos"))) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
@ -1905,19 +1931,12 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if (NameLen == 7 && !strcmp(NameStr, "fprintf")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
}
break;
case 'g':
if ((NameLen == 4 && !strcmp(NameStr, "getc")) ||
(NameLen == 10 && !strcmp(NameStr, "getlogin_r"))) {
(NameLen == 10 && !strcmp(NameStr, "getlogin_r")) ||
(NameLen == 13 && !strcmp(NameStr, "getc_unlocked"))) {
if (FTy->getNumParams() == 0 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
@ -1933,6 +1952,18 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
} else if ((NameLen == 4 && !strcmp(NameStr, "gets")) ||
(NameLen == 7 && !strcmp(NameStr, "getchar"))) {
setDoesNotThrow(F);
} else if (NameLen == 9 && !strcmp(NameStr, "getitimer")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 2);
} else if (NameLen == 8 && !strcmp(NameStr, "getpwnam")) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
}
break;
case 'u':
@ -1942,12 +1973,23 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 2);
} else if (NameLen == 6 && !strcmp(NameStr, "unlink")) {
} else if ((NameLen == 5 && !strcmp(NameStr, "uname")) ||
(NameLen == 6 && !strcmp(NameStr, "unlink")) ||
(NameLen == 8 && !strcmp(NameStr, "unsetenv"))) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
} else if ((NameLen == 5 && !strcmp(NameStr, "utime")) ||
(NameLen == 6 && !strcmp(NameStr, "utimes"))) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
}
break;
case 'p':
@ -1974,6 +2016,22 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotCapture(F, 2);
} else if (NameLen == 7 && !strcmp(NameStr, "putchar")) {
setDoesNotThrow(F);
} else if (NameLen == 5 && !strcmp(NameStr, "popen")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getReturnType()) ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if (NameLen == 6 && !strcmp(NameStr, "pclose")) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
}
break;
case 'v':
@ -2023,13 +2081,20 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
}
break;
case 'o':
if (NameLen == 7 && !strcmp(NameStr, "opendir")) {
// The description of fdopendir sounds like opening the same fd
// twice might result in the same DIR* !
if (!isa<PointerType>(FTy->getReturnType()))
if (NameLen == 4 && !strcmp(NameStr, "open")) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
// May throw; "open" is a valid pthread cancellation point.
setDoesNotCapture(F, 1);
} else if (NameLen == 7 && !strcmp(NameStr, "opendir")) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getReturnType()) ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
setDoesNotCapture(F, 1);
}
break;
case 't':
@ -2038,7 +2103,14 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
} else if (NameLen == 5 && !strcmp(NameStr, "times")) {
if (FTy->getNumParams() != 1 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
}
break;
case 'h':
if ((NameLen == 5 && !strcmp(NameStr, "htonl")) ||
(NameLen == 5 && !strcmp(NameStr, "htons"))) {
@ -2052,6 +2124,33 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotAccessMemory(F);
}
break;
case 'l':
if (NameLen == 5 && !strcmp(NameStr, "lstat")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if (NameLen == 6 && !strcmp(NameStr, "lchown")) {
if (FTy->getNumParams() != 3 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
}
break;
case 'q':
if (NameLen == 5 && !strcmp(NameStr, "qsort")) {
if (FTy->getNumParams() != 4 ||
!isa<PointerType>(FTy->getParamType(3)))
continue;
// May throw; places call through function pointer.
setDoesNotCapture(F, 4);
}
break;
case '_':
if ((NameLen == 8 && !strcmp(NameStr, "__strdup")) ||
(NameLen == 9 && !strcmp(NameStr, "__strndup"))) {
@ -2081,6 +2180,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
setDoesNotThrow(F);
setDoesNotCapture(F, 2);
}
break;
case 1:
if (NameLen == 15 && !strcmp(NameStr, "\1__isoc99_scanf")) {
if (FTy->getNumParams() < 1 ||
@ -2088,13 +2188,52 @@ bool SimplifyLibCalls::doInitialization(Module &M) {
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
} else if (NameLen == 16 && !strcmp(NameStr, "\1__isoc99_sscanf")) {
} else if ((NameLen == 7 && !strcmp(NameStr, "\1stat64")) ||
(NameLen == 8 && !strcmp(NameStr, "\1lstat64")) ||
(NameLen == 10 && !strcmp(NameStr, "\1statvfs64")) ||
(NameLen == 16 && !strcmp(NameStr, "\1__isoc99_sscanf"))) {
if (FTy->getNumParams() < 1 ||
!isa<PointerType>(FTy->getParamType(0)))
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if (NameLen == 8 && !strcmp(NameStr, "\1fopen64")) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getReturnType()) ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
setDoesNotCapture(F, 1);
setDoesNotCapture(F, 2);
} else if ((NameLen == 9 && !strcmp(NameStr, "\1fseeko64")) ||
(NameLen == 9 && !strcmp(NameStr, "\1ftello64"))) {
if (FTy->getNumParams() == 0 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 1);
} else if (NameLen == 10 && !strcmp(NameStr, "\1tmpfile64")) {
if (!isa<PointerType>(FTy->getReturnType()))
continue;
setDoesNotThrow(F);
setDoesNotAlias(F, 0);
} else if ((NameLen == 8 && !strcmp(NameStr, "\1fstat64")) ||
(NameLen == 11 && !strcmp(NameStr, "\1fstatvfs64"))) {
if (FTy->getNumParams() != 2 ||
!isa<PointerType>(FTy->getParamType(1)))
continue;
setDoesNotThrow(F);
setDoesNotCapture(F, 2);
} else if (NameLen == 7 && !strcmp(NameStr, "\1open64")) {
if (FTy->getNumParams() < 2 ||
!isa<PointerType>(FTy->getParamType(0)))
continue;
// May throw; "open" is a valid pthread cancellation point.
setDoesNotCapture(F, 1);
}
break;
}