Two changes relevant to LEA and x32:

[oota-llvm.git] / lib / Target / X86 / X86Schedule.td

diff --git a/lib/Target/X86/X86Schedule.td b/lib/Target/X86/X86Schedule.td
index c14407f9ac1b31631809f1f73cce4a4d81a42ea5..d99d085298f159c44a428b359f17ac77e897896a 100644 (file)
--- a/lib/Target/X86/X86Schedule.td
+++ b/lib/Target/X86/X86Schedule.td
@@ -470,12 +470,17 @@ def IIC_NOP : InstrItinClass;
 // latencies. Since these latencies are not used for pipeline hazards,
 // they do not need to be exact.
 //
+// ILPWindow=10 is an arbitrary threshold that approximates cycles of
+// latency hidden by instruction buffers. The actual value is not very
+// important but should be zero for inorder and nonzero for OOO processors.
+//
 // The GenericModel contains no instruciton itineraries.
 def GenericModel : SchedMachineModel {
   let IssueWidth = 4;
   let MinLatency = 0;
   let LoadLatency = 4;
   let HighLatency = 10;
+  let ILPWindow = 10;
 }
 
 include "X86ScheduleAtom.td"