From ca1bafda1d72e1ef909cb8a7b1ca74e283ffea99 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 13 Jul 2009 23:46:46 +0000
Subject: [PATCH] fix CBE & MSIL backends to not use the mangler for non-global
 symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75556 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/CBackend/CBackend.cpp | 53 +++++++++++++++++---------------
 lib/Target/MSIL/MSILWriter.cpp   | 22 +++++++++++--
 lib/Target/MSIL/MSILWriter.h     |  6 +++-
 3 files changed, 54 insertions(+), 27 deletions(-)

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index ac453581dfd..c3c2b0ed43f 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -102,12 +102,14 @@ namespace {
     std::set<const Argument*> ByValParams;
     unsigned FPCounter;
     unsigned OpaqueCounter;
+    DenseMap<const Value*, unsigned> AnonValueNumbers;
+    unsigned NextAnonValueNumber;
 
   public:
     static char ID;
     explicit CWriter(raw_ostream &o)
       : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0), 
-        TheModule(0), TAsm(0), TD(0), OpaqueCounter(0) {
+        TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
       FPCounter = 0;
     }
 
@@ -1428,33 +1430,36 @@ void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
 }
 
 std::string CWriter::GetValueName(const Value *Operand) {
-  std::string Name;
-
-  if (!isa<GlobalValue>(Operand) && Operand->getName() != "") {
-    std::string VarName;
-
-    Name = Operand->getName();
-    VarName.reserve(Name.capacity());
-
-    for (std::string::iterator I = Name.begin(), E = Name.end();
-         I != E; ++I) {
-      char ch = *I;
+  // Mangle globals with the standard mangler interface for LLC compatibility.
+  if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
+    return Mang->getValueName(GV);
+    
+  std::string Name = Operand->getName();
+    
+  if (Name.empty()) { // Assign unique names to local temporaries.
+    unsigned &No = AnonValueNumbers[Operand];
+    if (No == 0)
+      No = ++NextAnonValueNumber;
+    Name = "tmp__" + utostr(No);
+  }
+    
+  std::string VarName;
+  VarName.reserve(Name.capacity());
 
-      if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
-            (ch >= '0' && ch <= '9') || ch == '_')) {
-        char buffer[5];
-        sprintf(buffer, "_%x_", ch);
-        VarName += buffer;
-      } else
-        VarName += ch;
-    }
+  for (std::string::iterator I = Name.begin(), E = Name.end();
+       I != E; ++I) {
+    char ch = *I;
 
-    Name = "llvm_cbe_" + VarName;
-  } else {
-    Name = Mang->getValueName(Operand);
+    if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
+          (ch >= '0' && ch <= '9') || ch == '_')) {
+      char buffer[5];
+      sprintf(buffer, "_%x_", ch);
+      VarName += buffer;
+    } else
+      VarName += ch;
   }
 
-  return Name;
+  return "llvm_cbe_" + VarName;
 }
 
 /// writeInstComputationInline - Emit the computation for the specified
diff --git a/lib/Target/MSIL/MSILWriter.cpp b/lib/Target/MSIL/MSILWriter.cpp
index 8429c27eb6b..cc1bf8f1cda 100644
--- a/lib/Target/MSIL/MSILWriter.cpp
+++ b/lib/Target/MSIL/MSILWriter.cpp
@@ -240,8 +240,17 @@ bool MSILWriter::isZeroValue(const Value* V) {
 
 
 std::string MSILWriter::getValueName(const Value* V) {
+  std::string Name;
+  if (const GlobalValue *GV = cast<GlobalValue>(V))
+    Name = Mang->getValueName(GV);
+  else {
+    unsigned &No = AnonValueNumbers[V];
+    if (No == 0) No = ++NextAnonValueNumber;
+    Name = "tmp" + utostr(No);
+  }
+  
   // Name into the quotes allow control and space characters.
-  return "'"+Mang->getValueName(V)+"'";
+  return "'"+Name+"'";
 }
 
 
@@ -258,7 +267,16 @@ std::string MSILWriter::getLabelName(const std::string& Name) {
 
 
 std::string MSILWriter::getLabelName(const Value* V) {
-  return getLabelName(Mang->getValueName(V));
+  std::string Name;
+  if (const GlobalValue *GV = cast<GlobalValue>(V))
+    Name = Mang->getValueName(GV);
+  else {
+    unsigned &No = AnonValueNumbers[V];
+    if (No == 0) No = ++NextAnonValueNumber;
+    Name = "tmp" + utostr(No);
+  }
+  
+  return getLabelName(Name);
 }
 
 
diff --git a/lib/Target/MSIL/MSILWriter.h b/lib/Target/MSIL/MSILWriter.h
index 45f5579bfb3..2ef8a85d2bc 100644
--- a/lib/Target/MSIL/MSILWriter.h
+++ b/lib/Target/MSIL/MSILWriter.h
@@ -85,7 +85,11 @@ namespace {
       StaticInitList;
     const std::set<const Type *>* UsedTypes;
     static char ID;
-    MSILWriter(raw_ostream &o) : FunctionPass(&ID), Out(o) {
+    DenseMap<const Value*, unsigned> AnonValueNumbers;
+    unsigned NextAnonValueNumber;
+
+    MSILWriter(raw_ostream &o)
+       : FunctionPass(&ID), Out(o), NextAnonValueNumber(0) {
       UniqID = 0;
     }
 
-- 
2.34.1