projects / oota-llvm.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: f3a789d) | patch
Allocate SystemZ callee-saved registers backwards: R13-R6
authorJakob Stoklund Olesen <stoklund@2pi.dk>
Fri, 17 Jun 2011 03:47:30 +0000 (03:47 +0000)
committerJakob Stoklund Olesen <stoklund@2pi.dk>
Fri, 17 Jun 2011 03:47:30 +0000 (03:47 +0000)
commitb712ef9569b36eee697d4122a9bc4491a25d9125
tree3f155aedd7baa2ef306f05ce6aeba85ae2616a99tree | snapshot
parentf3a789d931de6b5be729c33ff476fb20f0badbb1commit | diff
Allocate SystemZ callee-saved registers backwards: R13-R6

The reserved R14-R15 are always saved in the prolog, and using CSRs
starting from R13 allows them to be saved in one instruction.

Thanks to Anton for explaining this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133233 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Target/SystemZ/SystemZRegisterInfo.td diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors