Temporarily revert r60973. It's inexplicably causing a failure when self-hosting LLVM:

llvm[2]: Linking Release executable opt (without symbols)
...
Undefined symbols:
  "llvm::APFloat::IEEEsingle", referenced from:
      __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(Constants.o)
      __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(AsmWriter.o)
      __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(ConstantFold.o)
  "llvm::APFloat::IEEEdouble", referenced from:
      __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(Constants.o)
      __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(AsmWriter.o)
      __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(ConstantFold.o)
ld: symbol(s) not found

This is in release mode. To replicate, compile llvm and llvm-gcc in optimized
mode. Then build llvm, in optimized mode, with the newly created compiler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60977 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/GVN.cpp

@@ -1034,7 +1034,6 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
     // Perform PHI construction.
     Value* v = GetValueForBlock(LI->getParent(), LI, BlockReplValues, true);
     LI->replaceAllUsesWith(v);
-    v->takeName(LI);
     if (isa<PointerType>(v->getType()))
       MD->invalidateCachedPointerInfo(v);
     toErase.push_back(LI);

test/Transforms/GVN/2007-07-26-InterlockingLoops.ll

@@ -1,5 +1,5 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp17625.* = phi i32. }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp17625 =}
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp17631 = phi i32. }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp17631 =}
 
 @last = external global [65 x i32*]		; <[65 x i32*]*> [#uses=1]
 

test/Transforms/GVN/2007-07-26-PhiErasure.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp298316 = phi i32 }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp298316 =}
 
 	%struct..0anon = type { i32 }
 	%struct.FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, %struct.__sFILEX*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }

test/Transforms/GVN/2007-07-31-NoDomInherit.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp47 = phi i32 }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep tmp51.rle
 
 	%struct.anon = type { i32 (i32, i32, i32)*, i32, i32, [3 x i32], i8*, i8*, i8* }
 @debug = external constant i32		; <i32*> [#uses=0]

test/Transforms/GVN/nonlocal.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%DEAD = phi i32. }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {DEAD =}
 
 define i32 @main(i32** %p) {
 block1:

test/Transforms/GVN/rle-must-alias.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD = phi i32 }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD.rle = phi i32}
 ; The %7 and %4 loads combine to make %DEAD unneeded.
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
 target triple = "i386-apple-darwin7"

test/Transforms/GVN/semidominated.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD = phi i32 }
+; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {DEAD =}
 
 define i32 @main(i32* %p) {
 block1: