From 2926733240d0766fbd45df6eb609ad2328f0307d Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Wed, 16 Mar 2011 22:56:11 +0000 Subject: Tag cached interference with a user-provided tag instead of the virtual register number. The live range of a virtual register may change which invalidates the cached interference information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127772 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocBase.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'lib/CodeGen/RegAllocBase.h') diff --git a/lib/CodeGen/RegAllocBase.h b/lib/CodeGen/RegAllocBase.h index 5af0ce79ac..f431d5a5a0 100644 --- a/lib/CodeGen/RegAllocBase.h +++ b/lib/CodeGen/RegAllocBase.h @@ -61,6 +61,11 @@ class LiveVirtRegQueue; /// assignment order. class RegAllocBase { LiveIntervalUnion::Allocator UnionAllocator; + + // Cache tag for PhysReg2LiveUnion entries. Increment whenever virtual + // registers may have changed. + unsigned UserTag; + protected: // Array of LiveIntervalUnions indexed by physical register. class LiveUnionArray { @@ -92,7 +97,7 @@ protected: // query on a new live virtual register. OwningArrayPtr Queries; - RegAllocBase(): TRI(0), MRI(0), VRM(0), LIS(0) {} + RegAllocBase(): UserTag(0), TRI(0), MRI(0), VRM(0), LIS(0) {} virtual ~RegAllocBase() {} @@ -104,7 +109,7 @@ protected: // before querying a new live virtual register. This ties Queries and // PhysReg2LiveUnion together. LiveIntervalUnion::Query &query(LiveInterval &VirtReg, unsigned PhysReg) { - Queries[PhysReg].init(&VirtReg, &PhysReg2LiveUnion[PhysReg]); + Queries[PhysReg].init(UserTag, &VirtReg, &PhysReg2LiveUnion[PhysReg]); return Queries[PhysReg]; } -- cgit v1.2.3