llvm-project

Commit Graph

Author	SHA1	Message	Date
Evan Cheng	8c4df8160e	The check for coalescing a virtual register to a physical register, e.g. cl = EXTRACT_SUBREG reg1024, 1, is overly conservative. It should check for overlaps of vr's live interval with the super registers of the physical register (ECX in this case) and let JoinIntervals() handle checking the coalescing feasibility against the physical register (cl in this case). llvm-svn: 98251	2010-03-11 08:20:21 +00:00

Author

SHA1

Message

Date

Evan Cheng

8c4df8160e

The check for coalescing a virtual register to a physical register, e.g.

cl = EXTRACT_SUBREG reg1024, 1, is overly conservative. It should check
for overlaps of vr's live interval with the super registers of the
physical register (ECX in this case) and let JoinIntervals() handle checking
the coalescing feasibility against the physical register (cl in this case).

llvm-svn: 98251

2010-03-11 08:20:21 +00:00

1 Commits