Weiming Zhao 812fde3603 DAG: avoid duplicated truncating for sign extended operand ...

Summary:
When performing cmp for EQ/NE and the operand is sign extended, we can
avoid the truncaton if the bits to be tested are no less than origianl
bits.

Reviewers: eli.friedman

Subscribers: eli.friedman, aemerson, nemanjai, t.p.northover, llvm-commits

Differential Revision: https://reviews.llvm.org/D22933

llvm-svn: 277252

2016-07-29 23:33:48 +00:00

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2007-01-31-RegInfoAssert.ll

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2007-02-02-JoinIntervalsCrash.ll

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2007-05-05-InvalidPushPop.ll

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2009-06-18-ThumbCommuteMul.ll

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2009-07-20-TwoAddrBug.ll

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2009-07-27-PEIAssert.ll

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2009-08-12-ConstIslandAssert.ll

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2009-08-12-RegInfoAssert.ll

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2009-08-20-ISelBug.ll

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2009-12-17-pre-regalloc-taildup.ll

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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

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2011-EpilogueBug.ll

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2012-04-26-M0ISelBug.ll

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2014-06-10-thumb1-ldst-opt-bug.ll

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and_neg.ll

Add a regression test for PR28348.

2016-06-29 17:34:31 +00:00

asmprinter-bug.ll

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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

DbgValueOtherTargets.test

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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 "RegScavenging: Add scavengeRegisterBackwards()"

2016-07-20 00:21:32 +00:00

ldm-merge-call.ll

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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

ldm-stm-postinc.ll

[Thumb-1] Select post-increment load and store where possible

2016-07-15 08:03:56 +00:00

ldr_ext.ll

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ldr_frame.ll

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lit.local.cfg

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long_shift.ll

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long-setcc.ll

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long.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

PR17309.ll

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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_guard_remat.ll

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stack-access.ll

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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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stm-merge.ll

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thumb-imm.ll

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thumb-ldm.ll

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thumb-shrink-wrapping.ll

DAG: avoid duplicated truncating for sign extended operand

2016-07-29 23:33:48 +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