[PowerPC] Put PPCEarlyReturn into its own source file

[oota-llvm.git] / lib / Target / PowerPC / PPC.td

diff --git a/lib/Target/PowerPC/PPC.td b/lib/Target/PowerPC/PPC.td
index 82946373706127edc83c22eff31e0839aeb2320d..bd16c67a5862ca35366e89869275ce99d7a15674 100644 (file)
--- a/lib/Target/PowerPC/PPC.td
+++ b/lib/Target/PowerPC/PPC.td
@@ -113,6 +113,11 @@ def FeatureP8Vector  : SubtargetFeature<"power8-vector", "HasP8Vector", "true",
                                         "Enable POWER8 vector instructions",
                                         [FeatureVSX, FeatureAltivec]>;
 
+def FeatureInvariantFunctionDescriptors :
+  SubtargetFeature<"invariant-function-descriptors",
+                   "HasInvariantFunctionDescriptors", "true",
+                   "Assume function descriptors are invariant">;
+
 def DeprecatedMFTB   : SubtargetFeature<"", "DeprecatedMFTB", "true",
                                         "Treat mftb as deprecated">;
 def DeprecatedDST    : SubtargetFeature<"", "DeprecatedDST", "true",
@@ -237,6 +242,34 @@ def : Processor<"7450", G4PlusItineraries, [Directive7400, FeatureAltivec,
                                             FeatureFRES, FeatureFRSQRTE]>;
 def : Processor<"g4+", G4PlusItineraries, [Directive7400, FeatureAltivec,
                                            FeatureFRES, FeatureFRSQRTE]>;
+
+/*  Since new processors generally contain a superset of features of those that
+    came before them, the idea is to make implementations of new processors
+    less error prone and easier to read.
+    Namely:
+        list<SubtargetFeature> Power8FeatureList = ...
+        list<SubtargetFeature> FutureProcessorSpecificFeatureList =
+            [ features that Power8 does not support ]
+        list<SubtargetFeature> FutureProcessorFeatureList =
+            !listconcat(Power8FeatureList, FutureProcessorSpecificFeatureList)
+
+    Makes it explicit and obvious what is new in FutureProcesor vs. Power8 as
+    well as providing a single point of definition if the feature set will be
+    used elsewhere.
+    
+*/
+def ProcessorFeatures {
+    list<SubtargetFeature> Power8FeatureList =
+        [DirectivePwr8, FeatureAltivec, FeatureVSX, FeatureP8Vector,
+        FeatureMFOCRF, FeatureFCPSGN, FeatureFSqrt, FeatureFRE,
+        FeatureFRES, FeatureFRSQRTE, FeatureFRSQRTES,
+        FeatureRecipPrec, FeatureSTFIWX, FeatureLFIWAX,
+        FeatureFPRND, FeatureFPCVT, FeatureISEL,
+        FeaturePOPCNTD, FeatureCMPB, FeatureLDBRX,
+        Feature64Bit /*, Feature64BitRegs */, FeatureICBT,
+        DeprecatedMFTB, DeprecatedDST];
+}
+
 def : ProcessorModel<"970", G5Model,
                   [Directive970, FeatureAltivec,
                    FeatureMFOCRF, FeatureFSqrt,
@@ -315,26 +348,14 @@ def : ProcessorModel<"pwr7", P7Model,
                    FeaturePOPCNTD, FeatureCMPB, FeatureLDBRX,
                    Feature64Bit /*, Feature64BitRegs */,
                    DeprecatedMFTB, DeprecatedDST]>;
-def : ProcessorModel<"pwr8", P8Model,
-                  [DirectivePwr8, FeatureAltivec, FeatureVSX, FeatureP8Vector,
-                   FeatureMFOCRF, FeatureFCPSGN, FeatureFSqrt, FeatureFRE,
-                   FeatureFRES, FeatureFRSQRTE, FeatureFRSQRTES,
-                   FeatureRecipPrec, FeatureSTFIWX, FeatureLFIWAX,
-                   FeatureFPRND, FeatureFPCVT, FeatureISEL,
-                   FeaturePOPCNTD, FeatureCMPB, FeatureLDBRX,
-                   Feature64Bit /*, Feature64BitRegs */, FeatureICBT,
-                   DeprecatedMFTB, DeprecatedDST]>;
+def : ProcessorModel<"pwr8", P8Model, ProcessorFeatures.Power8FeatureList>;
 def : Processor<"ppc", G3Itineraries, [Directive32]>;
 def : ProcessorModel<"ppc64", G5Model,
                   [Directive64, FeatureAltivec,
                    FeatureMFOCRF, FeatureFSqrt, FeatureFRES,
                    FeatureFRSQRTE, FeatureSTFIWX,
                    Feature64Bit /*, Feature64BitRegs */]>;
-def : ProcessorModel<"ppc64le", G5Model,
-                  [Directive64, FeatureAltivec,
-                   FeatureMFOCRF, FeatureFSqrt, FeatureFRES,
-                   FeatureFRSQRTE, FeatureSTFIWX,
-                   Feature64Bit /*, Feature64BitRegs */]>;
+def : ProcessorModel<"ppc64le", P8Model, ProcessorFeatures.Power8FeatureList>;
 
 //===----------------------------------------------------------------------===//
 // Calling Conventions