Second attempt:

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'll change the JIT with a follow-up patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70343 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/AsmWriterEmitter.cpp

@@ -650,7 +650,7 @@ void AsmWriterEmitter::run(std::ostream &O) {
   O << "\";\n\n";
 
   O << "  if (TAI->doesSupportDebugInformation() &&\n"
-    << "      DW->ShouldEmitDwarfDebug() && !Fast) {\n"
+    << "      DW->ShouldEmitDwarfDebug() && OptLevel != 0) {\n"
     << "    DebugLoc CurDL = MI->getDebugLoc();\n\n"
     << "    if (!CurDL.isUnknown()) {\n"
     << "      static DebugLocTuple PrevDLT(~0U, ~0U, ~0U);\n"

utils/TableGen/DAGISelEmitter.cpp

@@ -465,7 +465,7 @@ public:
       NumInputRootOps = N->getNumChildren();
 
       if (DisablePatternForFastISel(N, CGP))
-        emitCheck("!Fast");
+        emitCheck("OptLevel != 0");
 
       emitCheck(PredicateCheck);
     }