diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index fca7b02c40..f871b5a770 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -978,11 +978,14 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) computeRegisterProperties(); - // FIXME: These should be based on subtarget info. Plus, the values should - // be smaller when we are in optimizing for size mode. + // On Darwin, -Os means optimize for size without hurting performance, + // do not reduce the limit. maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores + maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8; maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores - maxStoresPerMemmove = 3; // For @llvm.memmove -> sequence of stores + maxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4; + maxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores + maxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4; setPrefLoopAlignment(16); benefitFromCodePlacementOpt = true; } |