For example, ARM allows:
    vmov.u32 s4, #0  -> vmov.i32, #0
'u32' is a more specific designator for the 32-bit integer type specifier
and is legal for any instruction which accepts 'i32' as a datatype suffix.

We want to say,
    def : TokenAlias<".u32", ".i32">;

This works by marking the match class of 'From' as a subclass of the
match class of 'To'.

rdar://10435076

llvm-svn: 145992

llvm-svn: 145991

multiple components.

llvm-svn: 145989

llvm-svn: 145988

This caused more offset errors.

llvm-svn: 145980

llvm-svn: 145979

llvm-svn: 145977

llvm-svn: 145976

1. Added opcode BUNDLE
2. Taught MachineInstr class to deal with bundled MIs
3. Changed MachineBasicBlock iterator to skip over bundled MIs; added an iterator to walk all the MIs
4. Taught MachineBasicBlock methods about bundled MIs

llvm-svn: 145975

llvm-svn: 145974

This pseudo-instruction contains a .align directive in its expansion, so
the total size may vary by 2 bytes.

It is too difficult to accurately keep track of this alignment
directive, just use the worst-case size instead.

llvm-svn: 145971

ARMConstantIslandPass may sometimes leave empty constant islands behind
(it really shouldn't). Remove the alignment from the empty islands so
the size calculations are still correct.

This should fix the many Thumb1 assembler errors in the nightly test
suite.

The reduced test case for this problem is way too big. That is to be
expected for ARMConstantIslandPass bugs.

<rdar://problem/10534709>

llvm-svn: 145970

llvm-svn: 145969

* Rename variables to reflect what they're actually used for.

llvm-svn: 145968

llvm-svn: 145965

llvm-svn: 145964

llvm-svn: 145963

llvm-svn: 145962

llvm-svn: 145961

llvm-svn: 145960

llvm-svn: 145954

llvm-svn: 145952

llvm-svn: 145947

llvm-svn: 145946

llvm-svn: 145944

llvm-svn: 145943

- Walking over pred_begin/pred_end is an expensive operation.
- PHINodes contain a value for each predecessor anyway.
- While it may look like we used to save a few iterations with the set,
  be aware that getIncomingValueForBlock does a linear search on
  the values of the phi node.
- Another -5% on ARMDisassembler.cpp (Release build). This was the last
  entry in the profile that was obviously wasting time.

llvm-svn: 145937

llvm-svn: 145934

llvm-svn: 145929

Fix a bunch of SSE/AVX patterns to use v2i64/v4i64 loads since all other integer vector loads are promoted to those.

llvm-svn: 145927

llvm-svn: 145926

FIXME: Restore more other arch-dependent MachO tests. (eg. r126401 and r133856)
llvm-svn: 145925

Clean up some of the shuffle decoding code for UNPCK instructions. Add instruction commenting for AVX/AVX2 forms for integer UNPCKs.

llvm-svn: 145924

Same as r145922, just for ARM mode.

llvm-svn: 145923

Fix the alias to encode 'mul r5, r6' as if it were 'mul r5, r6, r5' so we
match gas.

rdar://10532439

llvm-svn: 145922

Merge isSHUFPMask and isCommutedSHUFPMask into single function that can do both. Do the same for the 256-bit version. Use loops to reduce size of isVSHUFPYMask. Fix test cases that were incorrectly passing due to isCommutedSHUFPMask not checking for the vector being 128-bit. This caused some 256-bit shuffles to be incorrectly commuted.

llvm-svn: 145921

Using encoding T1 for offset of #0 and encoding T2 for #-0.

rdar://10532413

llvm-svn: 145919

MC/MachO assumes x86.

llvm-svn: 145916

recent discussions. Poison can't make every value that depends on
it act in maximally undefined ways, because the optimizer may still
hoist code following the usual rules for undef. Make Poison invoke
its full undefined behavior only when it reaches an instruction with
externally visible side effects.

llvm-svn: 145913

llvm-svn: 145912