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| author | Evan Cheng <evan.cheng@apple.com> | 2007-10-05 21:55:32 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-10-05 21:55:32 +0000 |
| commit | d3ccf00870355fdc82bf30ccd7f5d194d0591b72 (patch) | |
| tree | 7b5451395cde9b32a8b9969adfb64aad9b096a71 /llvm/lib | |
| parent | 9f413446de1ef758b7e44ca8931e60834fdcfa89 (diff) | |
| download | bcm5719-llvm-d3ccf00870355fdc82bf30ccd7f5d194d0591b72.tar.gz bcm5719-llvm-d3ccf00870355fdc82bf30ccd7f5d194d0591b72.zip | |
INC64_32r -> LEA64_32r is better than INC64_32r -> LEA32r, but it still can
cause performance degradation.
llvm-svn: 42653
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index e5223d9dce7..8836c9e9cc4 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -283,11 +283,9 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, switch (MIOpc) { default: return 0; case X86::INC64r: - case X86::INC32r: - case X86::INC64_32r: { + case X86::INC32r: { assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!"); - unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r - : (MIOpc == X86::INC64_32r ? X86::LEA64_32r : X86::LEA32r); + unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r : X86::LEA32r; NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, 1); break; } @@ -298,11 +296,9 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, NewMI = addRegOffset(BuildMI(get(X86::LEA16r), Dest), Src, 1); break; case X86::DEC64r: - case X86::DEC32r: - case X86::DEC64_32r: { + case X86::DEC32r: { assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!"); - unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r - : (MIOpc == X86::DEC64_32r ? X86::LEA64_32r : X86::LEA32r); + unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r : X86::LEA32r; NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, -1); break; } |
