Massive check in. This changes the "-fast" flag to "-O#" in llc. If you want to
use the old behavior, the flag is -O0. This change allows for finer-grained
control over which optimizations are run at different -O levels.

Most of this work was pretty mechanical. The majority of the fixes came from
verifying that a "fast" variable wasn't used anymore. The JIT still uses a
"Fast" flag. I'm not 100% sure if it's necessary to change it there...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70270 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetMachine.h b/lib/Target/X86/X86TargetMachine.h
index fdc00fa..4b4e26f 100644
--- a/lib/Target/X86/X86TargetMachine.h
+++ b/lib/Target/X86/X86TargetMachine.h
@@ -45,7 +45,7 @@
   // set this functions to ctor pointer at startup time if they are linked in.
   typedef FunctionPass *(*AsmPrinterCtorFn)(raw_ostream &o,
                                             X86TargetMachine &tm,
-                                            bool fast, bool verbose);
+                                            unsigned OptLevel, bool verbose);
   static AsmPrinterCtorFn AsmPrinterCtor;
 
 public:
@@ -74,14 +74,14 @@
   }
 
   // Set up the pass pipeline.
-  virtual bool addInstSelector(PassManagerBase &PM, bool Fast);
-  virtual bool addPreRegAlloc(PassManagerBase &PM, bool Fast);
-  virtual bool addPostRegAlloc(PassManagerBase &PM, bool Fast);
-  virtual bool addAssemblyEmitter(PassManagerBase &PM, bool Fast, 
+  virtual bool addInstSelector(PassManagerBase &PM, unsigned OptLevel);
+  virtual bool addPreRegAlloc(PassManagerBase &PM, unsigned OptLevel);
+  virtual bool addPostRegAlloc(PassManagerBase &PM, unsigned OptLevel);
+  virtual bool addAssemblyEmitter(PassManagerBase &PM, unsigned OptLevel, 
                                   bool Verbose, raw_ostream &Out);
-  virtual bool addCodeEmitter(PassManagerBase &PM, bool Fast,
+  virtual bool addCodeEmitter(PassManagerBase &PM, unsigned OptLevel,
                               bool DumpAsm, MachineCodeEmitter &MCE);
-  virtual bool addSimpleCodeEmitter(PassManagerBase &PM, bool Fast,
+  virtual bool addSimpleCodeEmitter(PassManagerBase &PM, unsigned OptLevel,
                                     bool DumpAsm, MachineCodeEmitter &MCE);
 
   /// symbolicAddressesAreRIPRel - Return true if symbolic addresses are