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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-17 23:03:21 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-17 23:03:21 +0000 |
| commit | af50f17df4f8092bb04ccb5393ffaf34ab34d006 (patch) | |
| tree | 7dd6c67f117fea0cd1510e8c4a61ac9d2d02f0a2 /llvm/lib | |
| parent | 8e7f202e32149f86bb15813398cc8f3b92b12387 (diff) | |
| download | bcm5719-llvm-af50f17df4f8092bb04ccb5393ffaf34ab34d006.tar.gz bcm5719-llvm-af50f17df4f8092bb04ccb5393ffaf34ab34d006.zip | |
Stop adding <imp-def> operands when expanding REG_SEQUENCE.
These extra operands are not needed by register allocators using
VirtRegRewriter, and RAFast don't need them any longer.
By omitting the <imp-def> operands, it becomes possible for the new
register coalescer to track which lanes are valid and which are undef.
llvm-svn: 164073
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/TwoAddressInstructionPass.cpp | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp index bd12f921328..df33a94ca76 100644 --- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -1758,10 +1758,6 @@ bool TwoAddressInstructionPass::EliminateRegSequences() { if (MO.isReg() && MO.isDef() && MO.getReg() == DstReg) MO.setIsUndef(); } - // Make sure there is a full non-subreg imp-def operand on the - // instruction. This shouldn't be necessary, but it seems that at least - // RAFast requires it. - Def->addRegisterDefined(DstReg, TRI); DEBUG(dbgs() << "First def: " << *Def); } |
