Revert "Introduce a string_ostream string builder facilty"

Temporarily back out commits r211749, r211752 and r211754.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211814 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 19 insertions, 11 deletions

diff --git a/lib/Target/NVPTX/NVPTXAsmPrinter.cpp b/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
index eee2f9264f..195b3c0fe9 100644
--- a/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
+++ b/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
@@ -146,7 +146,8 @@ const MCExpr *nvptx::LowerConstant(const Constant *CV, AsmPrinter &AP) {
 
     // Otherwise report the problem to the user.
     {
-      string_ostream OS;
+      std::string S;
+      raw_string_ostream OS(S);
       OS << "Unsupported expression in static initializer: ";
       CE->printAsOperand(OS, /*PrintType=*/ false,
                          !AP.MF ? nullptr : AP.MF->getFunction()->getParent());
diff --git a/lib/Target/TargetMachineC.cpp b/lib/Target/TargetMachineC.cpp
index 0b0a09a0ad..20923c97ec 100644
--- a/lib/Target/TargetMachineC.cpp
+++ b/lib/Target/TargetMachineC.cpp
@@ -237,13 +237,15 @@ LLVMBool LLVMTargetMachineEmitToFile(LLVMTargetMachineRef T, LLVMModuleRef M,
 LLVMBool LLVMTargetMachineEmitToMemoryBuffer(LLVMTargetMachineRef T,
   LLVMModuleRef M, LLVMCodeGenFileType codegen, char** ErrorMessage,
   LLVMMemoryBufferRef *OutMemBuf) {
-  string_ostream Code;
-  formatted_raw_ostream Out(Code);
+  std::string CodeString;
+  raw_string_ostream OStream(CodeString);
+  formatted_raw_ostream Out(OStream);
   bool Result = LLVMTargetMachineEmit(T, M, Out, codegen, ErrorMessage);
+  OStream.flush();
 
-  StringRef Buffer = Code.str();
-  *OutMemBuf = LLVMCreateMemoryBufferWithMemoryRangeCopy(Buffer.data(),
-                                                         Buffer.size(), "");
+  std::string &Data = OStream.str();
+  *OutMemBuf = LLVMCreateMemoryBufferWithMemoryRangeCopy(Data.c_str(),
+                                                     Data.length(), "");
   return Result;
 }
 
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 7e04608d99..3e57914f9e 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -2412,7 +2412,8 @@ bool X86AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
     if (Match3 == Match_Success) MatchChars[NumMatches++] = Suffixes[2];
     if (Match4 == Match_Success) MatchChars[NumMatches++] = Suffixes[3];
 
-    small_string_ostream<128> OS;
+    SmallString<126> Msg;
+    raw_svector_ostream OS(Msg);
     OS << "ambiguous instructions require an explicit suffix (could be ";
     for (unsigned i = 0; i != NumMatches; ++i) {
       if (i != 0)
diff --git a/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp b/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
index 3f9eb07d83..78403424da 100644
--- a/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
@@ -281,7 +281,8 @@ void X86AsmBackend::relaxInstruction(const MCInst &Inst, MCInst &Res) const {
   unsigned RelaxedOp = getRelaxedOpcode(Inst.getOpcode());
 
   if (RelaxedOp == Inst.getOpcode()) {
-    small_string_ostream<256> OS;
+    SmallString<256> Tmp;
+    raw_svector_ostream OS(Tmp);
     Inst.dump_pretty(OS);
     OS << "\n";
     report_fatal_error("unexpected instruction to relax: " + OS.str());
diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index cdfff82143..1dca5689ad 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -550,7 +550,8 @@ emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
 }
 
 void X86AsmPrinter::GenerateExportDirective(const MCSymbol *Sym, bool IsData) {
-  small_string_ostream<128> OS;
+  SmallString<128> Directive;
+  raw_svector_ostream OS(Directive);
   StringRef Name = Sym->getName();
 
   if (Subtarget->isTargetKnownWindowsMSVC())
@@ -571,7 +572,8 @@ void X86AsmPrinter::GenerateExportDirective(const MCSymbol *Sym, bool IsData) {
       OS << ",data";
   }
 
-  OutStreamer.EmitBytes(OS.str());
+  OS.flush();
+  OutStreamer.EmitBytes(Directive);
 }
 
 void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
diff --git a/lib/Target/XCore/XCoreAsmPrinter.cpp b/lib/Target/XCore/XCoreAsmPrinter.cpp
index 7b5da33496..e98d4f933d 100644
--- a/lib/Target/XCore/XCoreAsmPrinter.cpp
+++ b/lib/Target/XCore/XCoreAsmPrinter.cpp
@@ -267,7 +267,8 @@ PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
 }
 
 void XCoreAsmPrinter::EmitInstruction(const MachineInstr *MI) {
-  small_string_ostream<128> O;
+  SmallString<128> Str;
+  raw_svector_ostream O(Str);
 
   switch (MI->getOpcode()) {
   case XCore::DBG_VALUE: