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

  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

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

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

common encoding information.

llvm-svn: 119598

llvm-svn: 119597

queries, and SCEVExpander getRelevantLoop queries.

llvm-svn: 119595

llvm-svn: 119593

llvm-svn: 119590

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

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

llvm-svn: 119578

llvm-svn: 119575

llvm-svn: 119573

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

It was mistakenly looking at the pointer type when checking for the size of
global variables.  This is a partial fix for Radar 8673120.

llvm-svn: 119563

functions of ScalarEvolution, in preparation for memoization and
other optimizations.

llvm-svn: 119562

in the MC lowering process.

llvm-svn: 119559

Avoid isel movcc of large immediates when the large immediate is available in a register. These immediates aren't free.

llvm-svn: 119558

to avoid an unneeded dependence.

llvm-svn: 119557

needs to be checked that this won't break LCSSA form.
Change the existing checking method to a more direct one:
rather than seeing if all predecessors belong to the loop,
check that the replacing value is either not in any loop or
is in a loop that contains the phi node.

llvm-svn: 119556

llvm-svn: 119555

instead of in SCEVAddRecExpr's constructor, in preparation for an
upcoming change.

llvm-svn: 119554

llvm-svn: 119551

default ctor with ConstantRange.

llvm-svn: 119550