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authorEvan Cheng <evan.cheng@apple.com>2007-07-18 23:34:48 +0000
committerEvan Cheng <evan.cheng@apple.com>2007-07-18 23:34:48 +0000
commit273288c888027c64a0c0ba25a58fbf1f871b5311 (patch)
tree36c63493b23cd64402ac7e58cbd465cab4570c37 /lib/CodeGen/SimpleRegisterCoalescing.cpp
parentccb21fdbb68466a2720eefb2b6d9d314f5e1ad62 (diff)
Add comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40022 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
-rw-r--r--lib/CodeGen/SimpleRegisterCoalescing.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index 3d8618f6c4..b714bac86a 100644
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -369,6 +369,9 @@ bool SimpleRegisterCoalescing::JoinCopy(MachineInstr *CopyMI,
// If the intervals were swapped by Join, swap them back so that the register
// mapping (in the r2i map) is correct.
if (Swapped) SrcInt.swap(DstInt);
+
+ // repSrcReg is guarateed to be the register whose live interval that is
+ // being merged.
li_->removeInterval(repSrcReg);
r2rMap_[repSrcReg] = repDstReg;