llvm-6502/2008-12-29-Constant.ll at d496f88c0c663ec907e411ed7b821c6b20caf1fd - llvm-6502 - Applefritter: Git

6502/llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-22 07:32:48 +00:00

Dan Gohman a25e5dbcc2 Extend the AliasAnalysis::pointsToConstantMemory interface to allow it

to optionally look for constant or local (alloca) memory.

Teach BasicAliasAnalysis::pointsToConstantMemory to look through Select
and Phi nodes, and to support looking for local memory.

Remove FunctionAttrs' PointsToLocalOrConstantMemory function, now that
AliasAnalysis knows all the tricks that it knew.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118412 91177308-0d34-0410-b5e6-96231b3b80d8

2010-11-08 16:45:26 +00:00

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 ; RUN: opt < %s -basicaa -functionattrs -S | grep readnone
 @s = external constant i8		; <i8*> [#uses=1]
 define i8 @f() {
 	%tmp = load i8* @s		; <i8> [#uses=1]
 	ret i8 %tmp
 }