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On 10/06/12 03:01, Jakob Stoklund Olesen wrote:
<blockquote cite="mid:C23AAEB7-4A49-415E-9C3C-545CDB520D34@2pi.dk"
type="cite"><br>
<div>
<div>On Jun 8, 2012, at 6:18 AM, James Benton wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
<div>Fixed the following crash in llvm::APInt::lshr when
shiftAmt > BitWidth.<br>
Added a test which causes this crash.<br>
<br>
Program received signal SIGSEGV, Segmentation fault.<br>
0x0000000000ff5c9d in llvm::APInt::lshr
(this=0x7fffffffc880, shiftAmt=160)<br>
at
/home/james/private_vmware/llvm/lib/Support/APInt.cpp:1173<br>
1173 (pVal[i+offset+1] <<
(APINT_BITS_PER_WORD - wordShift));<br>
<br>
<br>
#0 0x0000000000ff5c9d in llvm::APInt::lshr
(this=0x7fffffffc870, shiftAmt=160)<br>
at llvm/lib/Support/APInt.cpp:1173<br>
#1 0x00000000009168d2 in (anonymous
namespace)::DAGCombiner::visitAND (this=0x7fffffffcf90,
N=0x181b3c0)<br>
at llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:2496<br>
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</blockquote>
</div>
<div><br>
</div>
<div>The test is failing here: <a moz-do-not-send="true"
href="http://lab.llvm.org:8011/builders/llvm-arm-linux/builds/1170">http://lab.llvm.org:8011/builders/llvm-arm-linux/builds/1170</a></div>
<br>
<div>
<pre style="font-family: 'Courier New', courier, monotype, monospace; "><span class="stdout" style="font-family: 'Courier New', courier, monotype, monospace; color: black; ">******************** TEST 'LLVM :: CodeGen/Generic/2012-06-08-APIntCrash.ll' FAILED ********************Script:
--
/wd/buildbot/llvm-arm-linux/llvm/Debug+Asserts/bin/llc < /wd/buildbot/llvm-arm-linux/llvm/test/CodeGen/Generic/2012-06-08-APIntCrash.ll
--
Exit Code: 134
Command Output (stderr):
--
Return operand #4 has unhandled type i32UNREACHABLE executed at CallingConvLower.cpp:112!
0 llc 0x01208534
1 llc 0x01208ebc
2 libc.so.6 0x4021cc10 __default_sa_restorer_v2 + 0
Stack dump:
0. Program arguments: /wd/buildbot/llvm-arm-linux/llvm/Debug+Asserts/bin/llc
1. Running pass 'Function Pass Manager' on module '<stdin>'.
2. Running pass 'ARM Instruction Selection' on function '@test1'
/wd/buildbot/llvm-arm-linux/llvm/test/CodeGen/Generic/Output/2012-06-08-APIntCrash.ll.script: line 2: 29742 Aborted '/wd/buildbot/llvm-arm-linux/llvm/Debug+Asserts/bin/llc' < '/wd/buildbot/llvm-arm-linux/llvm/test/CodeGen/Generic/2012-06-08-APIntCrash.ll'
--
********************
</span></pre>
</div>
<div><span class="stdout" style="font-family: 'Courier New',
courier, monotype, monospace; color: black; "><br>
</span></div>
</blockquote>
<br>
I have modified the test to the following (there is also a diff
attached).<br>
Verified to compile with ARM and still able to produce a crash using
this test before my patch.<br>
<br>
; RUN: llc < %s<br>
<br>
define void @test1(<8 x i32>* %ptr)<br>
{<br>
%1 = load <8 x i32>* %ptr, align 32<br>
%2 = and <8 x i32> %1, <i32 0, i32 0, i32 0, i32 -1,
i32 0, i32 0, i32 0, i32 -1><br>
store <8 x i32> %2, <8 x i32>* %ptr, align 16<br>
ret void<br>
}<br>
<br>
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