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author | Kalle Raiskila <kalle.raiskila@nokia.com> | 2011-08-26 10:14:56 +0000 |
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committer | Kalle Raiskila <kalle.raiskila@nokia.com> | 2011-08-26 10:14:56 +0000 |
commit | 54f8a9f54dfa39275f6fd277440b233891069283 (patch) | |
tree | 0b8ae4008ccc54f8f50bba1644b9628553e589a0 /lib/Target/CellSPU | |
parent | 5a18f20dab483ed20b67252a2eba4e5a5bd71cca (diff) | |
download | llvm-54f8a9f54dfa39275f6fd277440b233891069283.tar.gz llvm-54f8a9f54dfa39275f6fd277440b233891069283.tar.bz2 llvm-54f8a9f54dfa39275f6fd277440b233891069283.tar.xz |
Don't insert branch hint lables that are never used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138630 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/CellSPU')
-rw-r--r-- | lib/Target/CellSPU/SPUFrameLowering.cpp | 12 | ||||
-rw-r--r-- | lib/Target/CellSPU/SPUFrameLowering.h | 11 |
2 files changed, 0 insertions, 23 deletions
diff --git a/lib/Target/CellSPU/SPUFrameLowering.cpp b/lib/Target/CellSPU/SPUFrameLowering.cpp index 8e3186b599..093f99f287 100644 --- a/lib/Target/CellSPU/SPUFrameLowering.cpp +++ b/lib/Target/CellSPU/SPUFrameLowering.cpp @@ -181,18 +181,6 @@ void SPUFrameLowering::emitPrologue(MachineFunction &MF) const { MachineLocation FPSrc(MachineLocation::VirtualFP); Moves.push_back(MachineMove(ReadyLabel, FPDst, FPSrc)); } - } else { - // This is a leaf function -- insert a branch hint iff there are - // sufficient number instructions in the basic block. Note that - // this is just a best guess based on the basic block's size. - if (MBB.size() >= (unsigned) SPUFrameLowering::branchHintPenalty()) { - MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr(); - dl = MBBI->getDebugLoc(); - - // Insert terminator label - BuildMI(MBB, MBBI, dl, TII.get(SPU::PROLOG_LABEL)) - .addSym(MMI.getContext().CreateTempSymbol()); - } } } diff --git a/lib/Target/CellSPU/SPUFrameLowering.h b/lib/Target/CellSPU/SPUFrameLowering.h index 16789ddfc5..b837f2cf94 100644 --- a/lib/Target/CellSPU/SPUFrameLowering.h +++ b/lib/Target/CellSPU/SPUFrameLowering.h @@ -74,17 +74,6 @@ namespace llvm { static int FItoStackOffset(int frame_index) { return frame_index * stackSlotSize(); } - //! Number of instructions required to overcome hint-for-branch latency - /*! - HBR (hint-for-branch) instructions can be inserted when, for example, - we know that a given function is going to be called, such as printf(), - in the control flow graph. HBRs are only inserted if a sufficient number - of instructions occurs between the HBR and the target. Currently, HBRs - take 6 cycles, ergo, the magic number 6. - */ - static int branchHintPenalty() { - return 6; - } }; } |