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Commit Graph

Author	SHA1	Message	Date
Hal Finkel	8b1e460cd9	enable PPC register scavenging by default (update tests and remove some FIXMEs) llvm-svn: 145819	2011-12-05 17:55:17 +00:00
Dan Gohman	142428ce64	Eliminate more uses of llvm-as and llvm-dis. llvm-svn: 81293	2009-09-09 00:09:15 +00:00
Evan Cheng	3d9309c11d	Fix live variables issues: 1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue. 2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register: = EAX, AX<imp-use,kill> ... AX = In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things. llvm-svn: 48521	2008-03-19 00:52:20 +00:00

Author

SHA1

Message

Date

Hal Finkel

8b1e460cd9

enable PPC register scavenging by default (update tests and remove some FIXMEs)

llvm-svn: 145819

2011-12-05 17:55:17 +00:00

Dan Gohman

142428ce64

Eliminate more uses of llvm-as and llvm-dis.

llvm-svn: 81293

2009-09-09 00:09:15 +00:00

Evan Cheng

3d9309c11d

Fix live variables issues:

1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue.
2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register:
   = EAX, AX<imp-use,kill>
...
AX =
In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things.

llvm-svn: 48521

2008-03-19 00:52:20 +00:00

3 Commits