llvm-svn: 48968

llvm-svn: 48967

llvm-svn: 48966

llvm-svn: 48965

llvm-svn: 48964

patch by David Chisnall.

llvm-svn: 48963

llvm-svn: 48961

llvm-svn: 48954

llvm-svn: 48949

llvm-svn: 48947

llvm-svn: 48942

llvm-svn: 48941

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 )

llvm-svn: 48940

into a memset!) faster by avoiding an allocation of an std::list node.

llvm-svn: 48939

llvm-svn: 48938

llvm-svn: 48937

Remove some unneeded code for LiveInterval joining, and fix a bug in the Phi elimination algorithm where we were accidentally reasoning about
the source rather than the destination.

llvm-svn: 48936

llvm-svn: 48935

load value. This fixes PR2177.

llvm-svn: 48932

llvm-svn: 48926

llvm-svn: 48924

llvm-svn: 48922

Added skeleton checking for NSString's method initWithFormat: (do not pass nil).  This won't be useful in most cases right now
because the analyzer isn't tracking expected types for an object, and [NSString alloc] just runs "id".

llvm-svn: 48917

llvm-svn: 48916

llvm-svn: 48914

llvm-svn: 48912

llvm-svn: 48911

llvm-svn: 48910

memsets that initialize "structs of arrays" and other store sequences
that are not sequential.  This is still only enabled if you pass 
-form-memset-from-stores.  The flag is not heavily tested and I haven't
analyzed the perf regressions when -form-memset-from-stores is passed
either, but this causes no make check regressions.

llvm-svn: 48909

llvm-svn: 48908

llvm-svn: 48907

Fix a couple bozo bugs in the rewriter.

llvm-svn: 48903

llvm-svn: 48899

llvm-svn: 48898

Added test case to test warning about passing 'nil' to NSString's compare: method.

llvm-svn: 48896

llvm-svn: 48895

In order to handle indexed nodes I had to introduce
a new constructor, and since I was there I factorized
the code in the various load constructors.

llvm-svn: 48894

nodes. This doesn't currently have much impact the generated code, but it
does produce simpler-looking SelectionDAGs, and consequently
simpler-looking ScheduleDAGs, because there are fewer spurious
dependencies.

In particular, CopyValueToVirtualRegister now uses the entry node as the
input chain dependency for new CopyToReg nodes instead of calling getRoot
and depending on the most recent memory reference.

Also, rename UnorderedChains to PendingExports and pull it up from being
a local variable in SelectionDAGISel::BuildSelectionDAG to being a
member variable of SelectionDAGISel, so that it doesn't have to be
passed around to all the places that need it.

llvm-svn: 48893

llvm-svn: 48891

Increment iterator in advance.

llvm-svn: 48890