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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-05 14:38:48 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-05 14:38:48 +0000 |
| commit | 71804149a3a6f6c081b874869b27fafe7d3288ce (patch) | |
| tree | cf54aa2d5ab919f29dcba6c1bb132adcd30106bf /lib/Target/SystemZ/SystemZInstrInfo.h | |
| parent | e684b96e3c6513f88137afee7c344a4d2d9f0694 (diff) | |
| download | llvm-71804149a3a6f6c081b874869b27fafe7d3288ce.tar.gz llvm-71804149a3a6f6c081b874869b27fafe7d3288ce.tar.bz2 llvm-71804149a3a6f6c081b874869b27fafe7d3288ce.tar.xz | |
[SystemZ] Remove no-op MVCs
The stack coloring pass has code to delete stores and loads that become
trivially dead after coloring. Extend it to cope with single instructions
that copy from one frame index to another.
The testcase happens to show an example of this kicking in at the moment.
It did occur in Real Code too though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185705 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZInstrInfo.h')
| -rw-r--r-- | lib/Target/SystemZ/SystemZInstrInfo.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.h b/lib/Target/SystemZ/SystemZInstrInfo.h index 11d486cafb..3fe71d8854 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.h +++ b/lib/Target/SystemZ/SystemZInstrInfo.h @@ -91,6 +91,8 @@ public: int &FrameIndex) const LLVM_OVERRIDE; virtual unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const LLVM_OVERRIDE; + virtual bool isStackSlotCopy(const MachineInstr *MI, int &DestFrameIndex, + int &SrcFrameIndex) const LLVM_OVERRIDE; virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, |