From 05f845314a67f9c30a67e55ce1e3168ff6732ce8 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 23 Jan 2010 04:54:10 +0000
Subject: [PATCH] emit .ascii and .asciz through MCStreamer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94282 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/AsmPrinter.h     |  4 ---
 lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 46 +++++++--------------------
 test/CodeGen/X86/global-sections.ll   |  4 +--
 3 files changed, 14 insertions(+), 40 deletions(-)

diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index b45be2752be..f527562564a 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -340,10 +340,6 @@ namespace llvm {
     /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
     void EmitGlobalConstant(const Constant* CV, unsigned AddrSpace = 0);
     
-    /// EmitString - Emit a zero-byte-terminated string constant.
-    ///
-    virtual void EmitString(const ConstantArray *CVA) const;
-
   protected:
     /// EmitConstantValueOnly - Print out the specified constant, without a
     /// storage class.  Only constants of first-class type are allowed here.
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 50842078b46..f6b6307c2f2 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -683,6 +683,7 @@ void AsmPrinter::EmitInt64(uint64_t Value) const {
   OutStreamer.EmitIntValue(Value, 8, 0/*addrspace*/);
 }
 
+
 /// toOctal - Convert the low order bits of X into an octal digit.
 ///
 static inline char toOctal(int X) {
@@ -900,45 +901,22 @@ void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
   }
 }
 
-/// printAsCString - Print the specified array as a C compatible string, only if
-/// the predicate isString is true.
-///
-static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
-                           unsigned LastElt) {
-  assert(CVA->isString() && "Array is not string compatible!");
-
-  O << '\"';
-  for (unsigned i = 0; i != LastElt; ++i) {
-    unsigned char C =
-        (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
-    printStringChar(O, C);
-  }
-  O << '\"';
-}
-
-/// EmitString - Emit a zero-byte-terminated string constant.
-///
-void AsmPrinter::EmitString(const ConstantArray *CVA) const {
-  unsigned NumElts = CVA->getNumOperands();
-  if (MAI->getAscizDirective() && NumElts && 
-      cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
-    O << MAI->getAscizDirective();
-    printAsCString(O, CVA, NumElts-1);
-  } else {
-    O << MAI->getAsciiDirective();
-    printAsCString(O, CVA, NumElts);
-  }
-  O << '\n';
-}
-
 static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
                                     AsmPrinter &AP) {
-  if (AddrSpace == 0 && CA->isString()) {
-    AP.EmitString(CA);
-  } else { // Not a string.  Print the values in successive locations
+  if (AddrSpace != 0 || !CA->isString()) {
+    // Not a string.  Print the values in successive locations
     for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
       AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace);
+    return;
   }
+  
+  // Otherwise, it can be emitted as .ascii.
+  SmallVector<char, 128> TmpVec;
+  TmpVec.reserve(CA->getNumOperands());
+  for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+    TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
+
+  AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace);
 }
 
 static void EmitGlobalConstantVector(const ConstantVector *CV,
diff --git a/test/CodeGen/X86/global-sections.ll b/test/CodeGen/X86/global-sections.ll
index b6caa4f27f7..1a7b5777ae8 100644
--- a/test/CodeGen/X86/global-sections.ll
+++ b/test/CodeGen/X86/global-sections.ll
@@ -75,14 +75,14 @@
 ; LINUX:   .section	.gnu.linkonce.r.G6,"a",@progbits
 ; LINUX:   .weak	G6
 ; LINUX: G6:
-; LINUX:   .ascii	"\001"
+; LINUX:   .byte	1
 ; LINUX:   .size	G6, 1
 
 ; DARWIN:  .section __TEXT,__const_coal,coalesced
 ; DARWIN:  .globl _G6
 ; DARWIN:  .weak_definition _G6
 ; DARWIN:_G6:
-; DARWIN:  .ascii "\001"
+; DARWIN:  .byte 1
 
 
 @G7 = constant [10 x i8] c"abcdefghi\00"