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| author | Sanjiv Gupta <sanjiv.gupta@microchip.com> | 2009-05-12 04:30:38 +0000 |
|---|---|---|
| committer | Sanjiv Gupta <sanjiv.gupta@microchip.com> | 2009-05-12 04:30:38 +0000 |
| commit | ed4f4fbfba7d4eb2091480d9c0a4f00feb8af1db (patch) | |
| tree | da97463457c1b6c83d390b3e82074ff60da9753f /lib/Target/PIC16/PIC16MemSelOpt.cpp | |
| parent | 74b0ccc577062a25b8b3ab99b13cd1efa6e3a75a (diff) | |
| download | llvm-ed4f4fbfba7d4eb2091480d9c0a4f00feb8af1db.tar.gz llvm-ed4f4fbfba7d4eb2091480d9c0a4f00feb8af1db.tar.bz2 llvm-ed4f4fbfba7d4eb2091480d9c0a4f00feb8af1db.tar.xz | |
Mark mayLoad, mayStore for insns correctly and use them
to check if an insn is accessing memory during mem sel optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71537 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PIC16/PIC16MemSelOpt.cpp')
| -rw-r--r-- | lib/Target/PIC16/PIC16MemSelOpt.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/Target/PIC16/PIC16MemSelOpt.cpp b/lib/Target/PIC16/PIC16MemSelOpt.cpp index d433e31fbe..20f926def3 100644 --- a/lib/Target/PIC16/PIC16MemSelOpt.cpp +++ b/lib/Target/PIC16/PIC16MemSelOpt.cpp @@ -104,9 +104,13 @@ bool MemSelOpt::processInstruction(MachineInstr *MI) { bool Changed = false; unsigned NumOperands = MI->getNumOperands(); - // If this insn has only one operand, probably it is not going to - // access any data memory. - if (PIC16InstrInfo::hasNoMemOperand(*MI)) return Changed; + if (NumOperands == 0) return false; + + + // If this insn is not going to access any memory, return. + const TargetInstrDesc &TID = TII->get(MI->getOpcode()); + if (! (TID.isCall() || TID.mayLoad() || TID.mayStore())) + return false; // Scan for the memory address operand. // FIXME: Should we use standard interfaces like memoperands_iterator, |