llvm-project

Commit Graph

Author	SHA1	Message	Date
Evan Cheng	518bcd0ef4	Don't use movw / movt for iOS static codegen for now to workaround some tools issues. rdar://9514789 llvm-svn: 132211	2011-05-27 20:11:27 +00:00
Evan Cheng	97c9f84f68	Add iOS test llvm-svn: 132203	2011-05-27 19:04:21 +00:00
Anton Korobeynikov	2522908653	Materialize global addresses via movt/movw pair, this is always better than doing the same via constpool: 1. Load from constpool costs 3 cycles on A9, movt/movw pair - just 2. 2. Load from constpool might stall up to 300 cycles due to cache miss. 3. Movt/movw does not use load/store unit. 4. Less constpool entries => better compiler performance. This is only enabled on ELF systems, since darwin does not have needed relocations (yet). llvm-svn: 89720	2009-11-24 00:44:37 +00:00

Author

SHA1

Message

Date

Evan Cheng

518bcd0ef4

Don't use movw / movt for iOS static codegen for now to workaround some tools issues. rdar://9514789

llvm-svn: 132211

2011-05-27 20:11:27 +00:00

Evan Cheng

97c9f84f68

Add iOS test

llvm-svn: 132203

2011-05-27 19:04:21 +00:00

Anton Korobeynikov

2522908653

Materialize global addresses via movt/movw pair, this is always better

than doing the same via constpool:
1. Load from constpool costs 3 cycles on A9, movt/movw pair - just 2.
2. Load from constpool might stall up to 300 cycles due to cache miss.
3. Movt/movw does not use load/store unit.
4. Less constpool entries => better compiler performance.

This is only enabled on ELF systems, since darwin does not have needed
relocations (yet).

llvm-svn: 89720

2009-11-24 00:44:37 +00:00

3 Commits