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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Isel crash with large constant (csmith)"
href="https://bugs.llvm.org/show_bug.cgi?id=34859">34859</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Isel crash with large constant (csmith)
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: SystemZ
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>This (reduced) program:
@g_272 = external global i64, align 8
@g_276 = external global i16, align 2
; Function Attrs: noreturn nounwind
define void @main(i32 signext) local_unnamed_addr #0 {
store i16 -1, i16* @g_276, align 2
%2 = load i16, i16* @g_276, align 2
%3 = icmp ne i16 %2, 0
%4 = zext i1 %3 to i64
%5 = or i64 %4, 3944173009226982604
store i64 %5, i64* @g_272, align 8
tail call void @transparent_crc(i64 3944173009226982604, i32 signext undef)
unreachable
}
declare void @transparent_crc(i64, i32 signext) local_unnamed_addr #1
+
bin/llc -mtriple=s390x-linux-gnu -mcpu=z13
crashes with
LLVM ERROR: Cannot select: t47: i64 = Constant<3944173007420784641>
DAG:
Optimized legalized selection DAG: BB#0 'main:'
SelectionDAG has 25 nodes:
t0: ch = EntryToken
t45: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<i16*
@g_276> 0
t41: ch = store<ST2[@g_276], trunc to i16> t0, Constant:i32<65535>,
t45, undef:i64
t18: i64 = or Constant:i64<1>,
OpaqueConstant:i64<3944173009226982604>
t43: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<i64*
@g_272> 0
t34: ch = store<ST8[@g_272]> t0, t18, t43, undef:i64
t35: ch = TokenFactor t41, t34
t24: ch,glue = callseq_start t35, TargetConstant:i64<0>,
TargetConstant:i64<0>
t28: ch,glue = CopyToReg t24, Register:i64 %R2D,
OpaqueConstant:i64<3944173009226982604>
t30: ch,glue = CopyToReg t28, Register:i64 %R3D, Constant:i64<0>, t28:1
t26: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<void (i64,
i32)* @transparent_crc> 0
t32: ch,glue = SystemZISD::CALL t30, t26, Register:i64 %R2D, Register:i64
%R3D, RegisterMask:Untyped, t30:1
t33: ch,glue = callseq_end t32, TargetConstant:i64<0>, TargetConstant:i64<0>,
t32:1</pre>
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