llvm-svn: 37651

llvm-svn: 37650

llvm-svn: 37649

llvm-svn: 37648

Be careful to erase values from all of the appropriate sets when they're not needed anymore.  This fixes a few more memory-related issues.

llvm-svn: 37647

Thanks to Nicholas for valgrinding this.

llvm-svn: 37646

Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information.  No functionality change.

llvm-svn: 37645

with a general target hook to identify rematerializable instructions. Some
instructions are only rematerializable with specific operands, such as loads
from constant pools, while others are always rematerializable. This hook
allows both to be identified as being rematerializable with the same
mechanism.

llvm-svn: 37644

llvm-svn: 37643

llvm-svn: 37642

Anton for half of this patch.

llvm-svn: 37641

llvm-svn: 37640

llvm-svn: 37639

llvm-svn: 37638

llvm-svn: 37637

Look for VECTOR_SHUFFLE that's identity operation on either LHS or RHS. This can happen before DAGCombiner catches it.

llvm-svn: 37636

llvm-svn: 37635

llvm-svn: 37634

llvm-svn: 37633

Fix up Annotate attribute test case.
Fix DebugFilename.c test case to look for right file name.

llvm-svn: 37632

llvm-svn: 37631

llvm-svn: 37630

by making it non-recursive

llvm-svn: 37629

add operands after constant operands. The recent change to recognize
sign-extend expressions caused this to be exposed more often.

llvm-svn: 37628

llvm-svn: 37627

llvm-svn: 37626

llvm-svn: 37625

llvm-svn: 37624

llvm-svn: 37623

llvm-svn: 37622

llvm-svn: 37621

llvm-svn: 37620

these though.

llvm-svn: 37619

llvm-svn: 37618

define double @test2(i64 %A) {
   %B = bitcast i64 %A to double
   ret double %B
}

$ llvm-as < t.ll | llc -march=x86-64

before:

         .align  4
         .globl  _test2
_test2:
         movd %rdi, %xmm0
         ret

after:

_test2:
         subq $8, %rsp
         movq %rdi, (%rsp)
         movsd (%rsp), %xmm0
         addq $8, %rsp
         ret

llvm-svn: 37617

Use SmallPtrSet instead of std::vector to eliminate duplicate uses in a
function generated with -gen-function. This prevents the output from having
multiple duplicate declarations of constants and gvals.

llvm-svn: 37616

When printing the uses of a function (-gen-function only), make sure to
include the constants referenced by intializers of global variables.

llvm-svn: 37615

llvm-svn: 37614

1. Consider all possible ifcvt cases at once. No longer restricted to bottom
   up iterative approach.
2. Sort all possible cases based on a cost function. Perform the most profitable
   ones first invalidate others that target the same blocks.
3. Fixed a number of bugs related to block duplication.

llvm-svn: 37613

llvm-svn: 37612