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| author | Andrew Trick <atrick@apple.com> | 2012-12-01 01:22:44 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-12-01 01:22:44 +0000 |
| commit | 177d87ac8d974529b07430b2088f699ed279cd1d (patch) | |
| tree | 73b22afaa3754e1ed62a98e0ccc7fb1f8d6dd7a3 /lib/CodeGen/ScheduleDAGInstrs.cpp | |
| parent | 30fe61aa35ff12cdcbf5f94d8e3ab9a2d964654e (diff) | |
| download | llvm-177d87ac8d974529b07430b2088f699ed279cd1d.tar.gz llvm-177d87ac8d974529b07430b2088f699ed279cd1d.tar.bz2 llvm-177d87ac8d974529b07430b2088f699ed279cd1d.tar.xz | |
misched: Fix the DAG builder to handle an undef operand at ExitSU.
Assertion failed: (VNI && "No value to read by operand")
rdar://12790267.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169071 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/ScheduleDAGInstrs.cpp')
| -rw-r--r-- | lib/CodeGen/ScheduleDAGInstrs.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp index 2b00b596d3..fd75576c78 100644 --- a/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/lib/CodeGen/ScheduleDAGInstrs.cpp @@ -210,7 +210,8 @@ void ScheduleDAGInstrs::addSchedBarrierDeps() { Uses[Reg].push_back(PhysRegSUOper(&ExitSU, -1)); else { assert(!IsPostRA && "Virtual register encountered after regalloc."); - addVRegUseDeps(&ExitSU, i); + if (MO.readsReg()) // ignore undef operands + addVRegUseDeps(&ExitSU, i); } } } else { |