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James Molloy ae5ff990ae [Thumb] Reapply r272251 with a fix for PR28348 (mk 2) 
The important thing I was missing was ensuring newly added constants were kept in topological order. Repositioning the node is correct if the constant is newly added (so it has no topological ordering) but wrong if it already existed - positioning it next in the worklist would break the topological ordering.

Original commit message:
  [Thumb] Select a BIC instead of AND if the immediate can be encoded more optimally negated

  If an immediate is only used in an AND node, it is possible that the immediate can be more optimally materialized when negated. If this is the case, we can negate the immediate and use a BIC instead;

    int i(int a) {
      return a & 0xfffffeec;
    }

  Used to produce:
      ldr r1, [CONSTPOOL]
      ands r0, r1
    CONSTPOOL: 0xfffffeec

  And now produces:
      movs    r1, #255
      adds    r1, #20  ; Less costly immediate generation
      bics    r0, r1

llvm-svn: 274543
 		2016-07-05 12:37:13 +00:00
..
2007-01-31-RegInfoAssert.ll [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
2007-02-02-JoinIntervalsCrash.ll
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2007-05-05-InvalidPushPop.ll [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
2009-06-18-ThumbCommuteMul.ll
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2009-07-20-TwoAddrBug.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
2009-07-27-PEIAssert.ll
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2009-08-12-ConstIslandAssert.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
2009-08-12-RegInfoAssert.ll [opaque pointer type] Add textual IR support for explicit type parameter to gep operator 2015-03-13 18:20:45 +00:00
2009-08-20-ISelBug.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
2009-12-17-pre-regalloc-taildup.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
2010-06-18-SibCallCrash.ll
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2010-07-01-FuncAlign.ll [MC] Use .p2align instead of .align 2016-01-26 00:03:25 +00:00
2010-07-15-debugOrdering.ll ARM: stop emitting blx instructions for most calls on MachO. 2016-05-10 19:17:47 +00:00
2011-05-11-DAGLegalizer.ll Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
2011-06-16-NoGPRs.ll [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
2011-EpilogueBug.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
2012-04-26-M0ISelBug.ll
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2014-06-10-thumb1-ldst-opt-bug.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
DbgValueOtherTargets.test
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PR17309.ll [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 2015-02-27 19:29:02 +00:00
and_neg.ll Add a regression test for PR28348. 2016-06-29 17:34:31 +00:00
asmprinter-bug.ll [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
barrier.ll ARM: stop emitting blx instructions for most calls on MachO. 2016-05-10 19:17:47 +00:00
bic_imm.ll [Thumb] Reapply r272251 with a fix for PR28348 (mk 2) 2016-07-05 12:37:13 +00:00
constants.ll [Thumb] Fix off-by-one error in r272007 2016-06-14 13:33:07 +00:00
copy_thumb.ll
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cortex-m0-unaligned-access.ll [ARM] Define subtarget feature strict-align. 2015-07-28 22:44:28 +00:00
dyn-stackalloc.ll Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
fastcc.ll
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fpconv.ll
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fpow.ll
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frame_thumb.ll
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iabs.ll
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inlineasm-imm-thumb.ll
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inlineasm-thumb.ll
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ispositive.ll
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large-stack.ll Revert r265817 2016-04-08 18:15:37 +00:00
ldm-merge-call.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
ldm-merge-struct.ll Fix tests that used CHECK-NEXT-NOT and CHECK-DAG-NOT. 2016-02-26 19:40:34 +00:00
ldm-stm-base-materialization-thumb2.ll [ARM] Modify codegen for memcpy intrinsic to prefer LDM/STM. 2015-10-05 14:49:54 +00:00
ldm-stm-base-materialization.ll Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
ldr_ext.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
ldr_frame.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
lit.local.cfg
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long-setcc.ll
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long.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
long_shift.ll
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mature-mc-support.ll
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mul.ll
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pop.ll [ARM] Refactor the prologue/epilogue emission to be more robust. 2015-07-20 21:42:14 +00:00
push.ll
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rev.ll
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segmented-stacks-dynamic.ll
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segmented-stacks.ll [MC] Use .p2align instead of .align 2016-01-26 00:03:25 +00:00
select.ll
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sjljehprepare-lower-vector.ll Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
stack-access.ll [ARM] Fix handling of thumb1 out-of-range frame offsets 2015-03-20 17:20:07 +00:00
stack-coloring-without-frame-ptr.ll Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
stack-frame.ll
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stack_guard_remat.ll [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 2015-02-27 19:29:02 +00:00
stm-merge.ll [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
thumb-imm.ll
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thumb-ldm.ll [opaque pointer type] Add textual IR support for explicit type parameter to gep operator 2015-03-13 18:20:45 +00:00
thumb-shrink-wrapping.ll [Thumb] Fix assembler error 'cannot honor width suffix pop {lr}' 2015-12-28 21:40:45 +00:00
trap.ll
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triple.ll
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tst_teq.ll
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unord.ll
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vargs.ll [ARM] Refactor the prologue/epilogue emission to be more robust. 2015-07-20 21:42:14 +00:00