llvm-svn: 36430

copies from a constant global, then we can change the reads to read from the
global instead of from the alloca.  This eliminates the alloca and the memcpy,
and promotes secondary optimizations (because the loads are now loads from
a constant global).

This is important for a common C idiom:

void foo() {
   int A[] = {1,2,3,4,5,6,7,8,9...};
   ... only reads of A ...
}

For some reason, people forget to mark the array static or const.

This triggers on these multisource benchmarks:
JM/ldecode: block_pos, [3 x [4 x [4 x i32]]]
FreeBench/mason: m, [18 x i32], inlined 4 times
MiBench/office-stringsearch: search_strings, [1332 x i8*]
MiBench/office-stringsearch: find_strings, [1333 x i8*]
Prolangs-C++/city: dirs, [9 x i8*], inlined 4 places

and these spec benchmarks:
177.mesa: message, [8 x [32 x i8]]
186.crafty: bias_rl45, [64 x i32]
186.crafty: diag_sq, [64 x i32]
186.crafty: empty, [9 x i8]
186.crafty: xlate, [15 x i8]
186.crafty: status, [13 x i8]
186.crafty: bdinfo, [25 x i8]
445.gobmk: routines, [16 x i8*]
458.sjeng: piece_rep, [14 x i8*]
458.sjeng: t, [13 x i32], inlined 4 places.
464.h264ref: block8x8_idx, [3 x [4 x [4 x i32]]]
464.h264ref: block_pos, [3 x [4 x [4 x i32]]]
464.h264ref: j_off_tab, [12 x i32]

This implements Transforms/ScalarRepl/memcpy-from-global.ll

llvm-svn: 36429

llvm-svn: 36427

llvm-svn: 36426

llvm-svn: 36425

llvm-svn: 36423

llvm-svn: 36422

this approach is no longer appropriate.

llvm-svn: 36421

llvm-svn: 36420

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048376.html

llvm-svn: 36417

This fixes CodeGen/X86/2007-04-24-VectorCrash.ll

llvm-svn: 36413

llvm-svn: 36410

llvm-svn: 36407

llvm-svn: 36406

llvm-svn: 36405

llvm-svn: 36404

        vector_shuffle v1, v2, <2, 6, 3, 7>

I.e.

         vector_shuffle v, undef, <2, 2, 3, 3>

MMX only has a shuffle for v4i16 vectors. It needs to use the unpackh for
this type of operation.

llvm-svn: 36403

real vector type in this case.

llvm-svn: 36402

easy breakpointing).

Fix bugs reading constantexpr geps.  We now can disassemble kc++ global
initializers.

llvm-svn: 36398

llvm-svn: 36397

llvm-svn: 36396

llvm-svn: 36394

my approach to this, so hopefully I'll find a way to do this without making this slower.

llvm-svn: 36392

constant references, etc.

llvm-svn: 36391

llvm-svn: 36390

llvm-svn: 36389

llvm-svn: 36388

tests always being true in the process.

llvm-svn: 36387

llvm-svn: 36386

llvm-svn: 36385

llvm-svn: 36384

llvm-svn: 36383

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048333.html

llvm-svn: 36380

llvm-svn: 36378

llvm-svn: 36377

llvm-svn: 36374

BBOffsets and BBSizes when adjusting conditional branches.

llvm-svn: 36372

llvm-svn: 36371

llvm-svn: 36370

llvm-svn: 36369