[llvm] r302278 - TargetLibraryInfo: Introduce wcslen

[Matthias Braun via llvm-commits]

Author: matze
Date: Fri May  5 15:25:50 2017
New Revision: 302278

URL: http://llvm.org/viewvc/llvm-project?rev=302278&view=rev
Log:
TargetLibraryInfo: Introduce wcslen

wcslen is part of the C99 and C++98 standards.

- This introduces the function to TargetLibraryInfo.
- Also set attributes for wcslen in llvm::inferLibFuncAttributes().

Differential Revision: https://reviews.llvm.org/D32837

Modified:
    llvm/trunk/include/llvm/Analysis/TargetLibraryInfo.def
    llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp
    llvm/trunk/lib/Transforms/Utils/BuildLibCalls.cpp
    llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp

Modified: llvm/trunk/include/llvm/Analysis/TargetLibraryInfo.def
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/TargetLibraryInfo.def?rev=302278&r1=302277&r2=302278&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Analysis/TargetLibraryInfo.def (original)
+++ llvm/trunk/include/llvm/Analysis/TargetLibraryInfo.def Fri May  5 15:25:50 2017
@@ -1115,6 +1115,9 @@ TLI_DEFINE_STRING_INTERNAL("vsprintf")
 /// int vsscanf(const char *s, const char *format, va_list arg);
 TLI_DEFINE_ENUM_INTERNAL(vsscanf)
 TLI_DEFINE_STRING_INTERNAL("vsscanf")
+/// size_t wcslen (const wchar_t* wcs);
+TLI_DEFINE_ENUM_INTERNAL(wcslen)
+TLI_DEFINE_STRING_INTERNAL("wcslen")
 /// ssize_t write(int fildes, const void *buf, size_t nbyte);
 TLI_DEFINE_ENUM_INTERNAL(write)
 TLI_DEFINE_STRING_INTERNAL("write")

Modified: llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp?rev=302278&r1=302277&r2=302278&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp (original)
+++ llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp Fri May  5 15:25:50 2017
@@ -1176,6 +1176,10 @@ bool TargetLibraryInfoImpl::isValidProto
             FTy.getParamType(0)->isPointerTy() &&
             FTy.getParamType(1) == SizeTTy && FTy.getParamType(2) == SizeTTy);
 
+  case LibFunc_wcslen:
+    return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
+            FTy.getReturnType()->isIntegerTy());
+
   case LibFunc::NumLibFuncs:
     break;
   }

Modified: llvm/trunk/lib/Transforms/Utils/BuildLibCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/BuildLibCalls.cpp?rev=302278&r1=302277&r2=302278&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/BuildLibCalls.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/BuildLibCalls.cpp Fri May  5 15:25:50 2017
@@ -113,6 +113,7 @@ bool llvm::inferLibFuncAttributes(Functi
   bool Changed = false;
   switch (TheLibFunc) {
   case LibFunc_strlen:
+  case LibFunc_wcslen:
     Changed |= setOnlyReadsMemory(F);
     Changed |= setDoesNotThrow(F);
     Changed |= setDoesNotCapture(F, 0);

Modified: llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp?rev=302278&r1=302277&r2=302278&view=diff
==============================================================================
--- llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp (original)
+++ llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp Fri May  5 15:25:50 2017
@@ -334,6 +334,7 @@ TEST_F(TargetLibraryInfoTest, ValidProto
     "declare i32 @vsnprintf(i8*, i64, i8*, %struct*)\n"
     "declare i32 @vsprintf(i8*, i8*, %struct*)\n"
     "declare i32 @vsscanf(i8*, i8*, %struct*)\n"
+    "declare i64 @wcslen(i32*)\n"
 
     // These functions were also extracted from the OS X headers, but they are
     // available with a special name on darwin.