there is no need to check to see if the source and dest of a memcpy are noalias,
behavior is undefined if not.

llvm-svn: 119691

llvm-svn: 119690

out of processMemCpy into its own function.

llvm-svn: 119687

if it is passed as a byval argument.  The byval argument will just be a
read, so it is safe to read from the original global instead.  This allows
us to promote away the %agg.tmp alloca in PR8582

llvm-svn: 119686

to ignore calls that obviously can't modify the alloca
because they are readonly/readnone.

llvm-svn: 119683

optimization.  If the alloca that is "memcpy'd from constant" also has
a memcpy from *it*, ignore it: it is a load.  We now optimize the testcase to:

define void @test2() {
  %B = alloca %T
  %a = bitcast %T* @G to i8*
  %b = bitcast %T* %B to i8*
  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %b, i8* %a, i64 124, i32 4, i1 false)
  call void @bar(i8* %b)
  ret void
}

previously we would generate:

define void @test() {
  %B = alloca %T
  %b = bitcast %T* %B to i8*
  %G.0 = getelementptr inbounds %T* @G, i32 0, i32 0
  %tmp3 = load i8* %G.0, align 4
  %G.1 = getelementptr inbounds %T* @G, i32 0, i32 1
  %G.15 = bitcast [123 x i8]* %G.1 to i8*
  %1 = bitcast [123 x i8]* %G.1 to i984*
  %srcval = load i984* %1, align 1
  %B.0 = getelementptr inbounds %T* %B, i32 0, i32 0
  store i8 %tmp3, i8* %B.0, align 4
  %B.1 = getelementptr inbounds %T* %B, i32 0, i32 1
  %B.12 = bitcast [123 x i8]* %B.1 to i8*
  %2 = bitcast [123 x i8]* %B.1 to i984*
  store i984 %srcval, i984* %2, align 1
  call void @bar(i8* %b)
  ret void
}

llvm-svn: 119682

llvm-svn: 119681

  sahf	movl	344(%rdi),%r14d
we used to produce:

t.s:2:1: error: unexpected token in argument list

^

we now produce:
t.s:1:11: error: unexpected token in argument list
sahf	movl	344(%rdi),%r14d
    	    	^

rdar://8581401

llvm-svn: 119676

The attached patch fixes IRBuilder and the NoFolder class so that when
NoFolder is used the instructions it generates are treated just like
the ones IRBuilder creates directly (insert into block, assign them a
name and debug info, as applicable).
It does this by
1) having NoFolder return Instruction*s instead of Value*s,
2) having IRBuilder call Insert(Value, Name) on values obtained from
the folder like it does on instructions it creates directly, and
3) adding an Insert(Constant*, const Twine& = "") overload which just
returns the constant so that the other folders shouldn't have any
extra overhead as long as inlining is enabled.

While I was there, I also added some missing (CreateFNeg and various
Create*Cast) methods to NoFolder.

llvm-svn: 119614

and testing is easier.  A good example is the unknown-location.ll test that
now can just look for ".loc 1 0 0".  We also don't use a DW_LNE_set_address for
every address change anymore.

llvm-svn: 119613

llvm-svn: 119610

llvm-svn: 119608

the operand to the pattern.

llvm-svn: 119607

llvm-svn: 119606

memset; we may need it to decide between MOVAPS and MOVUPS
later.  Adjust a test that was looking for wrong code.
PR 3866 / 8675131.

llvm-svn: 119605

llvm-svn: 119604

llvm-svn: 119603

just pretend to be.

llvm-svn: 119602

llvm-svn: 119601

This is because of bug 331418 on Microsoft Connect.

llvm-svn: 119600

llvm-svn: 119599

common encoding information.

llvm-svn: 119598

llvm-svn: 119597

queries, and SCEVExpander getRelevantLoop queries.

llvm-svn: 119595

llvm-svn: 119593

llvm-svn: 119592

llvm-svn: 119590

llvm-svn: 119589

it as such. Add some encoding information.

llvm-svn: 119588

Some of these maps may merge in the future, but for now it's convenient to have
a utility function for them.

llvm-svn: 119587

memoize the results. This improves compile time in code which highly complex
expressions which get queried many times.

llvm-svn: 119584

Now that the MBlaze backend is in its own directory, split the test cases into multiple files for different types of instructions.

llvm-svn: 119580

to ScalarEvolution. Delete SCEV::~SCEV. SCEV is no longer virtual.

llvm-svn: 119578

llvm-svn: 119575

llvm-svn: 119573

appear to differ on Linux.  Try to make them pass on Linux.
Would be good for a Linux person to review this.

llvm-svn: 119572

llvm-svn: 119570

This completes the fixes for Radar 8673120.

llvm-svn: 119566

It is generally not sufficient to check if the starting offset is in range
of the maximum offset that can be efficiently used for the target.

llvm-svn: 119565

This makes it more clear that the symbol is an internal, compiler-generated
name and gives a little more description about its contents.

llvm-svn: 119564