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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-07-05 15:38:41 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-07-05 15:38:41 +0000 |
| commit | 9693d4c3f0d0e8c91e4748eb1c18799b1de7551c (patch) | |
| tree | 6eea6d38ca4f7fbe96131a5ddb11c263ded7e8a9 /lib/CodeGen/InlineSpiller.cpp | |
| parent | 2b0f4abfbe1c651fe6bd233bf89373d276c535a8 (diff) | |
| download | llvm-9693d4c3f0d0e8c91e4748eb1c18799b1de7551c.tar.gz llvm-9693d4c3f0d0e8c91e4748eb1c18799b1de7551c.tar.bz2 llvm-9693d4c3f0d0e8c91e4748eb1c18799b1de7551c.tar.xz | |
Fix PR10277.
Remat during spilling triggers dead code elimination. If a phi-def
becomes unused, that may also cause live ranges to split into separate
connected components.
This type of splitting is different from normal live range splitting. In
particular, there may not be a common original interval.
When the split range is its own original, make sure that the new
siblings are also their own originals. The range being split cannot be
used as an original since it doesn't cover the new siblings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134413 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/InlineSpiller.cpp')
| -rw-r--r-- | lib/CodeGen/InlineSpiller.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp index 0273891d69..4bd35c3812 100644 --- a/lib/CodeGen/InlineSpiller.cpp +++ b/lib/CodeGen/InlineSpiller.cpp @@ -425,6 +425,7 @@ void InlineSpiller::analyzeSiblingValues() { // Check possible sibling copies. if (VNI->isPHIDef() || VNI->getCopy()) { VNInfo *OrigVNI = OrigLI.getVNInfoAt(VNI->def); + assert(OrigVNI && "Def outside original live range"); if (OrigVNI->def != VNI->def) DefMI = traceSiblingValue(Reg, VNI, OrigVNI); } |