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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-01 22:39:25 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-01 22:39:25 +0000 |
| commit | a5135f60dd95275dcbc1123f866889151ced933d (patch) | |
| tree | 5e0dc69e54f439ac7bb172b3d378844eed75e103 /lib/CodeGen/SimpleRegisterCoalescing.cpp | |
| parent | 23d3d4595c23784494cba422a76428e48431413a (diff) | |
Properly compose subregister indices when coalescing.
The comment about ordering of subreg indices is no longer true.
This exposed a bug in the new substVirtReg method that is also fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105294 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index ed3c243ff3..7c1bc47fa9 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -848,19 +848,7 @@ SimpleRegisterCoalescing::UpdateRegDefsUses(unsigned SrcReg, unsigned DstReg, continue; } - // Sub-register indexes goes from small to large. e.g. - // RAX: 1 -> AL, 2 -> AX, 3 -> EAX - // EAX: 1 -> AL, 2 -> AX - // So RAX's sub-register 2 is AX, RAX's sub-regsiter 3 is EAX, whose - // sub-register 2 is also AX. - // - // FIXME: Properly compose subreg indices for all targets. - // - if (SubIdx && OldSubIdx && SubIdx != OldSubIdx) - ; - else if (SubIdx) - O.setSubReg(SubIdx); - O.setReg(DstReg); + O.substVirtReg(DstReg, SubIdx, *tri_); DEBUG({ dbgs() << "\t\tupdated: "; |