llvm-svn: 131439

llvm-svn: 131438

When instructions are deleted, they leave tombstone SlotIndex entries.
The isZeroLength method should ignore these null indexes.

This causes RABasic to sometimes spill a callee-saved register in the
abi-isel.ll test, so don't run that test with -regalloc=basic.  Prioritizing
register allocation according to spill weight can cause more registers to be
used.

llvm-svn: 131436

llvm-svn: 131424

llvm-svn: 131420

Basic fast-isel of extractvalue.  Not too helpful on its own, given the IR clang generates for cases like this, but it should become more useful soon.

llvm-svn: 131417

("T is 1 if the target symbol S has type STT_FUNC and the
symbol addresses a Thumb instruction ;it is 0 otherwise."
from "ELF for the ARM Architecture" 4.7.1.2)

Patch by Koan-Sin Tan!

llvm-svn: 131406

corrupted when setjmp returns again.

llvm-svn: 131399

llvm-svn: 131363

llvm-svn: 131350

llvm-svn: 131345

rdar://problem/9267970

Patch by Julien Lerouge!

llvm-svn: 131339

llvm-svn: 131330

llvm-svn: 131315

llvm-svn: 131314

llvm-svn: 131302

to fix PR9900. I will keep it open until sable is able to comment on it.

llvm-svn: 131294

simplified version.  <rdar://problem/9298790>

llvm-svn: 131274

rdar://problem/9298790

llvm-svn: 131269

rdar://problem/9298790

llvm-svn: 131266

by non-CMP expressions.  The executable test case (129821) would test
this as well, if we had an "-O0 -disable-arm-fast-isel" LLVM-GCC
tester.  Alas, the ARM assembly would be very difficult to check with
FileCheck.

The thumb2-cbnz.ll test is affected; it generates larger code (tst.w
vs. cmp #0), but I believe the new version is correct.
rdar://problem/9298790

llvm-svn: 131261

llvm-svn: 131252

Re-enable branchfolding common code hoisting optimization. Fixed a liveness test bug and also taught it to update liveins.

llvm-svn: 131241

llvm-svn: 131196

Identify end of prologue (and beginning of function body) using DW_LNS_set_prologue_end line table opcode.

llvm-svn: 131194

llvm-svn: 131191

llvm-svn: 131189

llvm-svn: 131184

Fixes a bug in the DAGCombiner.  LoadSDNodes have two values (data, chain).
If there is a store after the load node, then there is a chain, which means
that there is another user. Thus, asking hasOneUser would fail. Instead we
ask hasNUsesOfValue on the 'data' value.

llvm-svn: 131183

Add custom lowering of X86 vector SRA/SRL/SHL when the shift amount is a splat vector.

llvm-svn: 131179

to provide a reduced testcase.

llvm-svn: 131176

at the start of basic blocks to their common predecessor. It's actually quite
common (e.g. about 50 times in JM/lencod) and has shown to be a nice code size
benefit. e.g.

        pushq   %rax
        testl   %edi, %edi
        jne     LBB0_2
## BB#1:
        xorb    %al, %al
        popq    %rdx
        ret
LBB0_2:
        xorb    %al, %al
        callq   _foo
        popq    %rdx
        ret

=>

        pushq   %rax
        xorb    %al, %al
        testl   %edi, %edi
        je      LBB0_2
## BB#1:
        callq   _foo
LBB0_2:
        popq    %rdx
        ret

rdar://9145558

llvm-svn: 131172

llvm-svn: 131169

llvm-svn: 131151

llvm-svn: 131149

llvm-svn: 131146

this clang will use .debug_frame in, for example,
clang -g -c -m32 test.c
This matches gcc's behaviour. It looks like .debug_frame is a bit bigger
than .eh_frame, but has the big advantage of not being allocated.

llvm-svn: 131140

llvm-svn: 131129

Patch by Dan Bailey

llvm-svn: 131128

llvm-svn: 131121