llvm-svn: 35620

llvm-svn: 35619

llvm-svn: 35618

llvm-svn: 35617

llvm-svn: 35616

llvm-svn: 35615

llvm-svn: 35614

llvm-svn: 35613

llvm-svn: 35612

llvm-svn: 35611

llvm-svn: 35610

CodeGen/ARM/arm-negative-stride.ll to:

LBB1_2: @bb
        str r1, [r3, -r0, lsl #2]
        add r0, r0, #1
        cmp r0, r2
        bne LBB1_2      @bb

llvm-svn: 35609

llvm-svn: 35608

llvm-svn: 35607

recent dagcombine patch

llvm-svn: 35606

2. Help DAGCombiner recognize zero/sign/any-extended versions of ROTR and ROTL
patterns. This was motivated by the X86/rotate.ll testcase, which should now
generate code for other platforms (and soon-to-come platforms.) Rewrote code
slightly to make it easier to read.

llvm-svn: 35605

llvm-svn: 35604

llvm-svn: 35603

llvm-svn: 35602

to be folded into non-store instructions.

llvm-svn: 35601

llvm-svn: 35600

llvm-svn: 35599

llvm-svn: 35598

llvm-svn: 35597

llvm-svn: 35596

llvm-svn: 35595

2. Use cheaper APInt methods.

llvm-svn: 35594

llvm-svn: 35593

target hook.  This allows us to codegen a loop as:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0, +r3, lsl #2]
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

instead of:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0], #+4
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

This looks the same, but has one fewer induction variable (and therefore,
one fewer register) live in the loop.

llvm-svn: 35592

llvm-svn: 35591

equality comparisons of a constant.  This allows us to codegen the 'sintzero'
loop in PR1288 as:

LBB1_1: ;cond_next
        li r4, 0
        addi r2, r2, 1
        stw r4, 0(r3)
        addi r3, r3, 4
        cmpwi cr0, r2, -1
        bne cr0, LBB1_1 ;cond_next

instead of:

LBB1_1: ;cond_next
        addi r2, r2, 1
        li r4, 0
        xoris r5, r2, 65535
        stw r4, 0(r3)
        addi r3, r3, 4
        cmplwi cr0, r5, 65535
        bne cr0, LBB1_1 ;cond_next

This implements CodeGen/PowerPC/compare-simm.ll, and also cuts 74
instructions out of kc++.

llvm-svn: 35590

llvm-svn: 35589

llvm-svn: 35588

llvm-svn: 35587

llvm-svn: 35586

llvm-svn: 35585

test/Transforms/InstCombine/xor.ll:test28

llvm-svn: 35584

llvm-svn: 35583

llvm-svn: 35582

llvm-svn: 35581