diff options
| 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 | 98279e8d65fe5c86d0370b3e2a62f244985bec33 (patch) | |
| tree | c61cc7ed4c6cdebb5d63ee31c518627173667dc2 /lib/CodeGen | |
| parent | e1b53287179b4b9b5c3c549586f688d3fa2ae8ef (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164073 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/TwoAddressInstructionPass.cpp | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index bd12f92132..df33a94ca7 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/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); } |