llvm/lib/Transforms
Chris Lattner 97ae12a988 change iterator invalidation avoidance to just move the iterator backward
when something changes, instead of moving forward.  This allows us to 
simplify memset lowering, inserting the memset at the end of the range of 
stuff we're touching instead of at the start.

This, in turn, allows us to make use of the addressing instructions already
used in the function instead of inserting our own.  For example, we now
codegen:

	%tmp41 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 0		; <i8*> [#uses=2]
	call void @llvm.memset.i64( i8* %tmp41, i8 -1, i64 8, i32 1 )

instead of:

	%tmp20 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 7		; <i8*> [#uses=1]
	%ptroffset = getelementptr i8* %tmp20, i64 -7		; <i8*> [#uses=1]
	call void @llvm.memset.i64( i8* %ptroffset, i8 -1, i64 8, i32 1 )



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48940 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-29 05:15:47 +00:00
..
Hello Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
Instrumentation fix typos 2008-03-06 10:36:00 +00:00
IPO Increasing the inline limit from (overly conservative) 200 to 300. Given each BB costs 20 and each instruction costs 5, 200 means a 4 BB function + 24 instructions (actually less because caller's size also contributes to it). 2008-03-24 06:37:48 +00:00
Scalar change iterator invalidation avoidance to just move the iterator backward 2008-03-29 05:15:47 +00:00
Utils Increasing the inline limit from (overly conservative) 200 to 300. Given each BB costs 20 and each instruction costs 5, 200 means a 4 BB function + 24 instructions (actually less because caller's size also contributes to it). 2008-03-24 06:37:48 +00:00
Makefile remove attribution from lib Makefiles. 2007-12-29 20:09:26 +00:00