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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-20 22:14:17 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-20 22:14:17 +0000 |
| commit | 08c5a347a05e73a34c70ec8b694b1e89b96a6bf5 (patch) | |
| tree | a76fa657c38bf7451d29d6191c8a1c8f91c02221 /lib/CodeGen/TargetInstrInfoImpl.cpp | |
| parent | 344731c01805aeda49c747bac6148501fa85557c (diff) | |
| download | llvm-08c5a347a05e73a34c70ec8b694b1e89b96a6bf5.tar.gz llvm-08c5a347a05e73a34c70ec8b694b1e89b96a6bf5.tar.bz2 llvm-08c5a347a05e73a34c70ec8b694b1e89b96a6bf5.tar.xz | |
Permit remat when a virtual register has multiple defs.
TII::isTriviallyReMaterializable() shouldn't depend on any properties of the
register being defined by the instruction. Rematerialization is going to create
a new virtual register anyway.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129882 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/TargetInstrInfoImpl.cpp')
| -rw-r--r-- | lib/CodeGen/TargetInstrInfoImpl.cpp | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/lib/CodeGen/TargetInstrInfoImpl.cpp b/lib/CodeGen/TargetInstrInfoImpl.cpp index 15340a3f10..b9fcd3804d 100644 --- a/lib/CodeGen/TargetInstrInfoImpl.cpp +++ b/lib/CodeGen/TargetInstrInfoImpl.cpp @@ -388,11 +388,6 @@ isReallyTriviallyReMaterializableGeneric(const MachineInstr *MI, if (MO.isDef() != (i == 0)) return false; - // For the def, it should be the only def of that register. - if (MO.isDef() && (llvm::next(MRI.def_begin(Reg)) != MRI.def_end() || - MRI.isLiveIn(Reg))) - return false; - // Don't allow any virtual-register uses. Rematting an instruction with // virtual register uses would length the live ranges of the uses, which // is not necessarily a good idea, certainly not "trivial". |