diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-06 18:15:18 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-06 18:15:18 +0000 |
| commit | e617ccb80da76821379bbff4a2fdcd09e8401e8b (patch) | |
| tree | 83ab7c91cdf9ce34b1d5413b4482624e621e4393 /lib/CodeGen/VirtRegMap.cpp | |
| parent | f9dff0e0e4e8aa9fd99c5f069e431fe6de98c1c9 (diff) | |
Handle overlapping regunit intervals in LiveIntervals::addKillFlags().
We will soon allow virtual register live ranges to overlap regunit live
ranges when the physreg is defined as a copy of the virtreg:
%EAX = COPY %vreg5
FOO %vreg5
BAR %EAX<kill>
There is no real interference since %vreg5 and %EAX have the same value
where they overlap.
This patch prevents addKillFlags from adding virtreg kill flags to FOO
where the assigned physreg is overlapping the virtual register live
range.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163335 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index a1cac7c5b2..6343e8a352 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -200,7 +200,7 @@ bool VirtRegRewriter::runOnMachineFunction(MachineFunction &fn) { DEBUG(VRM->dump()); // Add kill flags while we still have virtual registers. - LIS->addKillFlags(); + LIS->addKillFlags(VRM); // Live-in lists on basic blocks are required for physregs. addMBBLiveIns(); |