replace 'break's with 'return 0' in visitCallInst code for objectsize, since there is no need to fallback to visitCallSite.
This gives a 0.9% in a test case

llvm-svn: 156069

llvm-svn: 156060

Fix 256-bit vpshuflw and vpshufhw immediate encoding to handle undefs in the lower half correctly. Missed in r155982.

llvm-svn: 156059

to catch cases like:
 %reg1024<def> = MOV r1
 %reg1025<def> = MOV r0
 %reg1026<def> = ADD %reg1024, %reg1025
 r0            = MOV %reg1026

By commuting ADD, it let coalescer eliminate all of the copies. However, there
was a bug in the heuristics where it ended up commuting the ADD in:

 %reg1024<def> = MOV r0
 %reg1025<def> = MOV 0
 %reg1026<def> = ADD %reg1024, %reg1025
 r0            = MOV %reg1026

That did no benefit but rather ensure the last MOV would not be coalesced.

rdar://11355268

llvm-svn: 156048

The ensures that virtual registers always belong to an allocatable class.
If your target attempts to create a vreg for an operand that has no
allocatable register subclass, you will crash quickly.

This ensures that targets define register classes as intended.

llvm-svn: 156046

llvm-svn: 156034

Teach DAGCombine the same multiply-by-1.0 folding trick when doing FMAs, just like it now knows for FMULs.

llvm-svn: 156029

For Intel Atom, use ILP scheduling always, instead of ILP for 64 bit
and Hybrid for 32 bit, since benchmarks show ILP scheduling is better
most of the time.

llvm-svn: 156028

Lincroft and Medfield.

llvm-svn: 156025

llvm-svn: 156023

llvm-svn: 156019

be used by clang-tblgen.

llvm-svn: 156000

by providing the latencies for the instructions in X86InstrFPStack.td.

llvm-svn: 155996

The commit is intended to fix rdar://10961709.
But it is the root cause of PR12720.
Revert it for now.

llvm-svn: 155992

llvm-svn: 155986

methods. Use a weak value handle to keep up with this.
PR12245

llvm-svn: 155984

llvm-svn: 155983

llvm-svn: 155982

llvm-svn: 155976

llvm-svn: 155960

llvm-svn: 155959

llvm-svn: 155957

llvm-svn: 155956

PR10799

llvm-svn: 155954

llvm-svn: 155947

Aliases for adding a negative immediate when using an explicit 'w'
suffix. E.g.,
        adds.w r2, #-16
        adds.w r2, r2, #-16
        addw r2, #-16
        addw r2, #-16
        addw r2, r2, #-16

rdar://11330769

llvm-svn: 155946

Expressions for movw/movt don't always have an :upper16: or :lower16:
on them and that's ok. When they don't, it's just a plain [0-65536]
immediate result, effectively the same as a :lower16: variant kind.

rdar://10550147

llvm-svn: 155941

This patch marks the X86 floating point stack registers ST0-ST7 as reserved
in order to avoid assertion failures in the register scavenger. The assertion
failures were “Bad machine code: Using an undefined physical register” and
“Bad machine code: MBB exits via unconditional fall-through but its successor
differs from its CFG successor!”.

llvm-svn: 155930

Previously, an unsupported/unknown assembler directive issued a warning.
That's generally unsafe, and inconsistent with the behaviour of pretty
much every system assembler. Now that the MC assemblers are mature
enough to be the default on multiple targets, it's reasonable to
issue errors for these.

For target or platform directives that need to stay warnings, we
should add explicit handlers for them in, e.g., ELFAsmParser.cpp,
DarwinAsmParser.cpp, et. al., and issue the warning there.

rdar://9246275

llvm-svn: 155926

The caller is already responsible for eating any additional input on the
line. Putting an additional EatToEndOfStatement() in ParseStatement()
causes an entire extra statement to be consumed when treating warnings
as errors. For example, test/MC/macros.s will assert() because the
.endmacro directive is missed as a result.

rdar://11355843

llvm-svn: 155925

This patch will optimize the following cases on X86
(a > b) ? (a-b) : 0
(a >= b) ? (a-b) : 0
(b < a) ? (a-b) : 0
(b <= a) ? (a-b) : 0

FROM
movl    %edi, %ecx
subl    %esi, %ecx
cmpl    %edi, %esi
movl    $0, %eax
cmovll  %ecx, %eax
TO
xorl    %eax, %eax
subl    %esi, %edi
cmovll  %eax, %edi
movl    %edi, %eax

rdar: 10734411
llvm-svn: 155919

X86: Use StackRegister instead of FrameRegister in getFrameIndexReference (to generate debug info for local variables) if stack needs realignment

llvm-svn: 155917

llvm-svn: 155915

llvm-svn: 155909

- Improved parameter names for clarity
- Added comments
- emitCommonSymbols should return void because its return value is not being
  used anywhere
- Attempt to reduce the usage of the RelocationValueRef type. Restricts it 
  for a single goal and may serve as a step for eventual removal.

llvm-svn: 155908

llvm-svn: 155907

The TargetPassManager's default constructor wants to initialize the PassManager
to 'null'. But it's illegal to bind a null reference to a null l-value. Make the
ivar a pointer instead.
PR12468

llvm-svn: 155902

llvm-svn: 155899

- There's no point having a different type for the local and global symbol
  tables.
- Renamed SymbolTable to GlobalSymbolTable to clarify the intention
- Improved const correctness where relevant

llvm-svn: 155898

llvm-svn: 155897