Index: llvm/include/llvm/Analysis/TargetLibraryInfo.def
===================================================================
--- llvm/include/llvm/Analysis/TargetLibraryInfo.def
+++ llvm/include/llvm/Analysis/TargetLibraryInfo.def
@@ -1420,6 +1420,18 @@
 /// void *valloc(size_t size);
 TLI_DEFINE_ENUM_INTERNAL(valloc)
 TLI_DEFINE_STRING_INTERNAL("valloc")
+/// void *vec_calloc(size_t count, size_t size);
+TLI_DEFINE_ENUM_INTERNAL(vec_calloc)
+TLI_DEFINE_STRING_INTERNAL("vec_calloc")
+/// void vec_free(void *ptr);
+TLI_DEFINE_ENUM_INTERNAL(vec_free)
+TLI_DEFINE_STRING_INTERNAL("vec_free")
+/// void *vec_malloc(size_t size);
+TLI_DEFINE_ENUM_INTERNAL(vec_malloc)
+TLI_DEFINE_STRING_INTERNAL("vec_malloc")
+/// void *vec_realloc(void *ptr, size_t size);
+TLI_DEFINE_ENUM_INTERNAL(vec_realloc)
+TLI_DEFINE_STRING_INTERNAL("vec_realloc")
 /// int vfprintf(FILE *stream, const char *format, va_list ap);
 TLI_DEFINE_ENUM_INTERNAL(vfprintf)
 TLI_DEFINE_STRING_INTERNAL("vfprintf")
Index: llvm/lib/Analysis/MemoryBuiltins.cpp
===================================================================
--- llvm/lib/Analysis/MemoryBuiltins.cpp
+++ llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -72,6 +72,7 @@
 // know which functions are nounwind, noalias, nocapture parameters, etc.
 static const std::pair<LibFunc, AllocFnsTy> AllocationFnData[] = {
   {LibFunc_malloc,              {MallocLike,  1, 0,  -1}},
+  {LibFunc_vec_malloc,          {MallocLike,  1, 0,  -1}},
   {LibFunc_valloc,              {MallocLike,  1, 0,  -1}},
   {LibFunc_Znwj,                {OpNewLike,   1, 0,  -1}}, // new(unsigned int)
   {LibFunc_ZnwjRKSt9nothrow_t,  {MallocLike,  2, 0,  -1}}, // new(unsigned int, nothrow)
@@ -103,7 +104,9 @@
   {LibFunc_msvc_new_array_longlong_nothrow, {MallocLike,  2, 0,  -1}}, // new[](unsigned long long, nothrow)
   {LibFunc_aligned_alloc,       {AlignedAllocLike, 2, 1,  -1}},
   {LibFunc_calloc,              {CallocLike,  2, 0,   1}},
+  {LibFunc_vec_calloc,          {CallocLike,  2, 0,   1}},
   {LibFunc_realloc,             {ReallocLike, 2, 1,  -1}},
+  {LibFunc_vec_realloc,         {ReallocLike, 2, 1,  -1}},
   {LibFunc_reallocf,            {ReallocLike, 2, 1,  -1}},
   {LibFunc_strdup,              {StrDupLike,  1, -1, -1}},
   {LibFunc_strndup,             {StrDupLike,  2, 1,  -1}}
Index: llvm/lib/Analysis/TargetLibraryInfo.cpp
===================================================================
--- llvm/lib/Analysis/TargetLibraryInfo.cpp
+++ llvm/lib/Analysis/TargetLibraryInfo.cpp
@@ -551,6 +551,14 @@
     TLI.setUnavailable(LibFunc_nvvm_reflect);
   }
 
+  // These vec_malloc/free routines are only available on AIX.
+  if (!T.isOSAIX()) {
+    TLI.setUnavailable(LibFunc_vec_calloc);
+    TLI.setUnavailable(LibFunc_vec_malloc);
+    TLI.setUnavailable(LibFunc_vec_realloc);
+    TLI.setUnavailable(LibFunc_vec_free);
+  }
+
   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
 }
 
@@ -831,6 +839,7 @@
   case LibFunc_system:
     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
   case LibFunc_malloc:
+  case LibFunc_vec_malloc:
     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
   case LibFunc_memcmp:
     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
@@ -885,6 +894,7 @@
     return (FTy.getReturnType()->isPointerTy());
   case LibFunc_realloc:
   case LibFunc_reallocf:
+  case LibFunc_vec_realloc:
     return (NumParams == 2 && FTy.getReturnType() == PCharTy &&
             FTy.getParamType(0) == FTy.getReturnType() &&
             IsSizeTTy(FTy.getParamType(1)));
@@ -912,6 +922,7 @@
   case LibFunc_bzero:
     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
   case LibFunc_calloc:
+  case LibFunc_vec_calloc:
     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
 
   case LibFunc_atof:
@@ -962,6 +973,7 @@
   case LibFunc_mkdir:
   case LibFunc_mktime:
   case LibFunc_times:
+  case LibFunc_vec_free:
     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
 
   case LibFunc_fopen:
Index: llvm/lib/Transforms/Utils/BuildLibCalls.cpp
===================================================================
--- llvm/lib/Transforms/Utils/BuildLibCalls.cpp
+++ llvm/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -391,6 +391,7 @@
     Changed |= setOnlyReadsMemory(F, 0);
     return Changed;
   case LibFunc_malloc:
+  case LibFunc_vec_malloc:
     Changed |= setOnlyAccessesInaccessibleMemory(F);
     Changed |= setRetNoUndef(F);
     Changed |= setDoesNotThrow(F);
@@ -473,6 +474,7 @@
     Changed |= setDoesNotCapture(F, 0);
     return Changed;
   case LibFunc_realloc:
+  case LibFunc_vec_realloc:
     Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
     Changed |= setRetNoUndef(F);
     Changed |= setDoesNotThrow(F);
@@ -555,6 +557,7 @@
     Changed |= setOnlyWritesMemory(F, 0);
     return Changed;
   case LibFunc_calloc:
+  case LibFunc_vec_calloc:
     Changed |= setOnlyAccessesInaccessibleMemory(F);
     Changed |= setRetNoUndef(F);
     Changed |= setDoesNotThrow(F);
@@ -612,6 +615,7 @@
     Changed |= setDoesNotCapture(F, 0);
     return Changed;
   case LibFunc_free:
+  case LibFunc_vec_free:
     Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
     Changed |= setArgsNoUndef(F);
     Changed |= setDoesNotThrow(F);
Index: llvm/unittests/Analysis/TargetLibraryInfoTest.cpp
===================================================================
--- llvm/unittests/Analysis/TargetLibraryInfoTest.cpp
+++ llvm/unittests/Analysis/TargetLibraryInfoTest.cpp
@@ -580,6 +580,12 @@
       "declare double @__sinh_finite(double)\n"
       "declare float @__sinhf_finite(float)\n"
       "declare x86_fp80 @__sinhl_finite(x86_fp80)\n"
+
+      // These functions are aix vec allocation/free routines
+      "declare i8* @vec_calloc(i64, i64)\n"
+      "declare i8* @vec_malloc(i64)\n"
+      "declare i8* @vec_realloc(i8*, i64)\n"
+      "declare void @vec_free(i8*)\n"
       );
 
   for (unsigned FI = 0; FI != LibFunc::NumLibFuncs; ++FI) {