From e0a73ec0a982a4213f3de9860545d9bf2814593d Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Fri, 1 Oct 2010 23:52:25 +0000 Subject: When RemoveCopyByCommutingDef is creating additional identity copies, just use LiveInterval::MergeValueNumberInto instead of trying to extend LiveRanges and getting it wrong. This fixed PR8249 where a valno with a multi-segment live range was defined by an identity copy created by RemoveCopyByCommutingDef. Some of the live segments disappeared. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115385 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/CodeGen/LiveInterval.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/llvm/CodeGen/LiveInterval.h') diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h index 706d449516..720fb830e4 100644 --- a/include/llvm/CodeGen/LiveInterval.h +++ b/include/llvm/CodeGen/LiveInterval.h @@ -81,6 +81,11 @@ namespace llvm { unsigned getFlags() const { return flags; } void setFlags(unsigned flags) { this->flags = flags; } + /// Merge flags from another VNInfo + void mergeFlags(const VNInfo *VNI) { + flags = (flags | VNI->flags) & ~IS_UNUSED; + } + /// For a register interval, if this VN was definied by a copy instr /// getCopy() returns a pointer to it, otherwise returns 0. /// For a stack interval the behaviour of this method is undefined. -- cgit v1.2.3