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[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.

llvm-svn: 364581
This commit is contained in:
Jinsong Ji 2019-06-27 19:35:11 +00:00
parent 6ed459fd41
commit c627aa2fa9
3 changed files with 1 additions and 7 deletions
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5
llvm/lib/Target/PowerPC/PPC.td
View File

@ -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 =

1
llvm/lib/Target/PowerPC/PPCSubtarget.cpp
View File

@ -108,7 +108,6 @@ void PPCSubtarget::initializeEnvironment() {
HasDirectMove = false;
IsQPXStackUnaligned = false;
HasHTM = false;
HasFusion = false;
HasFloat128 = false;
IsISA3_0 = false;
UseLongCalls = false;

2
llvm/lib/Target/PowerPC/PPCSubtarget.h
View File

@ -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; }