Create a PPC440 SchedMachineModel

Some of the older PPC processor definitions don't have associated
SchedMachineModels; correct this for the PPC440.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195949 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPC.td b/lib/Target/PowerPC/PPC.td
index 54e3d400a9d94c3dd876075e387d8a7bd4f2c471..18430d47a463e9218eae6a71fe66d421a20c228a 100644 (file)
--- a/lib/Target/PowerPC/PPC.td
+++ b/lib/Target/PowerPC/PPC.td
@@ -153,12 +153,12 @@ include "PPCInstrInfo.td"
 //
 
 def : Processor<"generic", G3Itineraries, [Directive32]>;
-def : Processor<"440", PPC440Itineraries, [Directive440, FeatureISEL,
-                                           FeatureFRES, FeatureFRSQRTE,
-                                           FeatureBookE, DeprecatedMFTB]>;
-def : Processor<"450", PPC440Itineraries, [Directive440, FeatureISEL,
-                                           FeatureFRES, FeatureFRSQRTE,
-                                           FeatureBookE, DeprecatedMFTB]>;
+def : ProcessorModel<"440", PPC440Model, [Directive440, FeatureISEL,
+                                          FeatureFRES, FeatureFRSQRTE,
+                                          FeatureBookE, DeprecatedMFTB]>;
+def : ProcessorModel<"450", PPC440Model, [Directive440, FeatureISEL,
+                                          FeatureFRES, FeatureFRSQRTE,
+                                          FeatureBookE, DeprecatedMFTB]>;
 def : Processor<"601", G3Itineraries, [Directive601]>;
 def : Processor<"602", G3Itineraries, [Directive602]>;
 def : Processor<"603", G3Itineraries, [Directive603,

diff --git a/lib/Target/PowerPC/PPCSchedule440.td b/lib/Target/PowerPC/PPCSchedule440.td
index 11d79f2be01c9335663accd0d71ebeb84c636d6f..780fa4779b4406cc01cb783f2de4c38eae416775 100644 (file)
--- a/lib/Target/PowerPC/PPCSchedule440.td
+++ b/lib/Target/PowerPC/PPCSchedule440.td
@@ -555,3 +555,17 @@ def PPC440Itineraries : ProcessorItineraries<
                                 [6, 0],
                                 [P440_FPR_Bypass, P440_FPR_Bypass]>
 ]>;
+
+// ===---------------------------------------------------------------------===//
+// PPC440 machine model for scheduling and other instruction cost heuristics.
+
+def PPC440Model : SchedMachineModel {
+  let IssueWidth = 2;  // 2 instructions are dispatched per cycle.
+  let MinLatency = -1; // OperandCycles are interpreted as MinLatency.
+  let LoadLatency = 5; // Optimistic load latency assuming bypass.
+                       // This is overriden by OperandCycles if the
+                       // Itineraries are queried instead.
+
+  let Itineraries = PPC440Itineraries;
+}
+