[PowerPC][NFC] Remove unused (and unsupported) fusion feature bits.

FeatureFusion bits was first introduced in
https://reviews.llvm.org/rL253724. for add/load integer fusion for P8.
The only use of `hasFusion` was https://reviews.llvm.org/rL255319.

However, this was removed later in https://reviews.llvm.org/rL280440.

So, there is NO any reference to fusion in code now.

Leaving it there is misleading and confusing, so remove it for now.
We can alwasy add back if we ever support fusion in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364581 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPC.td b/lib/Target/PowerPC/PPC.td
index 03522adc52945df0edf48b387b48126c6c5fb80e..8e94a2ae15e052a46fb3cccba4b031728b82d09e 100644 (file)
--- a/lib/Target/PowerPC/PPC.td
+++ b/lib/Target/PowerPC/PPC.td
@@ -164,8 +164,6 @@ def FeatureHTM : SubtargetFeature<"htm", "HasHTM", "true",
                                   "Enable Hardware Transactional Memory instructions">;
 def FeatureMFTB   : SubtargetFeature<"", "FeatureMFTB", "true",
                                         "Implement mftb using the mfspr instruction">;
-def FeatureFusion : SubtargetFeature<"fusion", "HasFusion", "true",
-                                     "Target supports add/load integer fusion.">;
 def FeaturePPCPreRASched:
   SubtargetFeature<"ppc-prera-sched", "UsePPCPreRASchedStrategy", "true",
                    "Use PowerPC pre-RA scheduling strategy">;
@@ -233,8 +231,7 @@ def ProcessorFeatures {
        FeatureMFTB, DeprecatedDST, FeatureTwoConstNR];
   list<SubtargetFeature> Power8SpecificFeatures =
       [DirectivePwr8, FeatureP8Altivec, FeatureP8Vector, FeatureP8Crypto,
-       FeatureHTM, FeatureDirectMove, FeatureICBT, FeaturePartwordAtomic,
-       FeatureFusion];
+       FeatureHTM, FeatureDirectMove, FeatureICBT, FeaturePartwordAtomic];
   list<SubtargetFeature> Power8FeatureList =
       !listconcat(Power7FeatureList, Power8SpecificFeatures);
   list<SubtargetFeature> Power9SpecificFeatures =

diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
index 0d2786e84432a39c1c4701b79f68b1b7d0373f66..82f71806e5d0a82fb9cc909a94bc1d9bf43ecd80 100644 (file)
--- a/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -108,7 +108,6 @@ void PPCSubtarget::initializeEnvironment() {
   HasDirectMove = false;
   IsQPXStackUnaligned = false;
   HasHTM = false;
-  HasFusion = false;
   HasFloat128 = false;
   IsISA3_0 = false;
   UseLongCalls = false;

diff --git a/lib/Target/PowerPC/PPCSubtarget.h b/lib/Target/PowerPC/PPCSubtarget.h
index a59cbd60618ee70732f533cb2e0a11d8a87ede1e..55fec1cb6d99829adda6e8b48094db4635342af7 100644 (file)
--- a/lib/Target/PowerPC/PPCSubtarget.h
+++ b/lib/Target/PowerPC/PPCSubtarget.h
@@ -131,7 +131,6 @@ protected:
   bool HasPartwordAtomics;
   bool HasDirectMove;
   bool HasHTM;
-  bool HasFusion;
   bool HasFloat128;
   bool IsISA3_0;
   bool UseLongCalls;
@@ -292,7 +291,6 @@ public:
   }
 
   bool hasHTM() const { return HasHTM; }
-  bool hasFusion() const { return HasFusion; }
   bool hasFloat128() const { return HasFloat128; }
   bool isISA3_0() const { return IsISA3_0; }
   bool useLongCalls() const { return UseLongCalls; }