diff options
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/PowerPC/PPCTargetMachine.cpp | 4 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCTargetMachine.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp index df3e3d2257..6d5e050773 100644 --- a/lib/Target/PowerPC/PPCTargetMachine.cpp +++ b/lib/Target/PowerPC/PPCTargetMachine.cpp @@ -96,6 +96,10 @@ PPCTargetMachine::PPCTargetMachine(const Module &M, const std::string &FS, setRelocationModel(Reloc::Static); } +/// Override this for PowerPC. Tail merging happily breaks up instruction issue +/// groups, which typically degrades performance. +const bool PPCTargetMachine::DoTailMergeDefault() const { return false; } + PPC32TargetMachine::PPC32TargetMachine(const Module &M, const std::string &FS) : PPCTargetMachine(M, FS, false) { } diff --git a/lib/Target/PowerPC/PPCTargetMachine.h b/lib/Target/PowerPC/PPCTargetMachine.h index a249952aa1..fdf9d35e57 100644 --- a/lib/Target/PowerPC/PPCTargetMachine.h +++ b/lib/Target/PowerPC/PPCTargetMachine.h @@ -73,6 +73,7 @@ public: MachineCodeEmitter &MCE); virtual bool addSimpleCodeEmitter(FunctionPassManager &PM, bool Fast, MachineCodeEmitter &MCE); + virtual const bool DoTailMergeDefault() const; }; /// PPC32TargetMachine - PowerPC 32-bit target machine. |