Make pattern isel default for ppc

Add new ppc beta option related to using condition registers
Make pattern isel control flag (-enable-pattern-isel) global and tristate
  0 == off
  1 == on
  2 == target default


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21309 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/Target/TargetOptions.h b/include/llvm/Target/TargetOptions.h
index 887e404f74..a4038430cb 100644
--- a/include/llvm/Target/TargetOptions.h
+++ b/include/llvm/Target/TargetOptions.h
@@ -34,6 +34,13 @@ namespace llvm {
   /// over the place.
   extern bool NoExcessFPPrecision;
 
+  /// PatternISelTriState - This flag is enabled when -pattern-isel=X is
+  /// specified on the command line.  The default value is 2, in which case the
+  /// target chooses what is best for it.  Setting X to 0 forces the use of
+  /// a simple ISel if available, while setting it to 1 forces the use of a
+  /// pattern ISel if available.
+  extern int PatternISelTriState;
+
 } // End llvm namespace
 
 #endif