Revert 179071 because it is not the right way to support non standard new/new[] operators.

llvm-svn: 179084

llvm/lib/Analysis/MemoryBuiltins.cpp

@@ -52,6 +52,14 @@ struct AllocFnsTy {
 static const AllocFnsTy AllocationFnData[] = {
   {LibFunc::malloc,              MallocLike,  1, 0,  -1},
   {LibFunc::valloc,              MallocLike,  1, 0,  -1},
+  {LibFunc::Znwj,                MallocLike,  1, 0,  -1}, // new(unsigned int)
+  {LibFunc::ZnwjRKSt9nothrow_t,  MallocLike,  2, 0,  -1}, // new(unsigned int, nothrow)
+  {LibFunc::Znwm,                MallocLike,  1, 0,  -1}, // new(unsigned long)
+  {LibFunc::ZnwmRKSt9nothrow_t,  MallocLike,  2, 0,  -1}, // new(unsigned long, nothrow)
+  {LibFunc::Znaj,                MallocLike,  1, 0,  -1}, // new[](unsigned int)
+  {LibFunc::ZnajRKSt9nothrow_t,  MallocLike,  2, 0,  -1}, // new[](unsigned int, nothrow)
+  {LibFunc::Znam,                MallocLike,  1, 0,  -1}, // new[](unsigned long)
+  {LibFunc::ZnamRKSt9nothrow_t,  MallocLike,  2, 0,  -1}, // new[](unsigned long, nothrow)
   {LibFunc::posix_memalign,      MallocLike,  3, 2,  -1},
   {LibFunc::calloc,              CallocLike,  2, 0,   1},
   {LibFunc::realloc,             ReallocLike, 2, 1,  -1},

llvm/test/Transforms/GVN/newoperator.ll

@@ -1,20 +0,0 @@
-; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
-
-; We can't remove the load because new operators are overideable and can return non-undefined memory.
-;CHECK: main
-;CHECK: load
-;CHECK: ret
-define i32 @main(i32 %argc, i8** nocapture %argv) ssp uwtable {
-  %1 = tail call noalias i8* @_Znam(i64 800)
-  %2 = bitcast i8* %1 to i32**
-  %3 = load i32** %2, align 8, !tbaa !0
-  %4 = icmp eq i32* %3, null
-  %5 = zext i1 %4 to i32
-  ret i32 %5
-}
-
-declare noalias i8* @_Znam(i64)
-
-!0 = metadata !{metadata !"any pointer", metadata !1}
-!1 = metadata !{metadata !"omnipotent char", metadata !2}
-!2 = metadata !{metadata !"Simple C/C++ TBAA"}

llvm/test/Transforms/InstCombine/invoke.ll

@@ -47,3 +47,19 @@ lpad:
   unreachable
 }
 
+; CHECK: @f3
+define void @f3() nounwind uwtable ssp {
+; CHECK: invoke void @llvm.donothing()
+  %call = invoke noalias i8* @_Znwm(i64 13)
+          to label %invoke.cont unwind label %lpad
+
+invoke.cont:
+  ret void
+
+lpad:
+  %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+          filter [0 x i8*] zeroinitializer
+  %2 = extractvalue { i8*, i32 } %1, 0
+  tail call void @__cxa_call_unexpected(i8* %2) noreturn nounwind
+  unreachable
+}

llvm/test/Transforms/InstCombine/objsize-64.ll

@@ -25,7 +25,7 @@ entry:
           to label %invoke.cont unwind label %lpad
 
 invoke.cont:
-; CHECK: ret i64 %0
+; CHECK: ret i64 13
   store i8* %call, i8** %esc
   %0 = tail call i64 @llvm.objectsize.i64(i8* %call, i1 false)
   ret i64 %0