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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [AArch64] llc crashes with assertion "Illegal shifted immedate value!" on AArch64."
href="https://llvm.org/bugs/show_bug.cgi?id=23591">23591</a>
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<tr>
<th>Summary</th>
<td>[AArch64] llc crashes with assertion "Illegal shifted immedate value!" on AArch64.
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kevinqindev@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$cat test.ll
define i64 @test(i64 %h, i64 %l, i64 %d) {
entry:
%h.addr = alloca i64, align 8
%l.addr = alloca i64, align 8
%d.addr = alloca i64, align 8
store i64 %h, i64* %h.addr, align 8
store i64 %l, i64* %l.addr, align 8
store i64 %d, i64* %d.addr, align 8
%0 = load i64, i64* %h.addr, align 8
%shl = shl i64 %0, 64
%1 = load i64, i64* %l.addr, align 8
%or = or i64 %shl, %1
%2 = load i64, i64* %d.addr, align 8
%div = udiv i64 %or, %2
ret i64 %div
}
$llc small.ll -O0 -o small.o -mtriple aarch64
llc:
/home/kevin/llvm_trunk/llvm/lib/Target/AArch64/MCTargetDesc/AArch64AddressingModes.h:100:
unsigned int llvm::AArch64_AM::getShifterImm(AArch64_AM::ShiftExtendType,
unsigned int): Assertion `(Imm & 0x3f) == Imm && "Illegal shifted immedate
value!"' failed.
The equivalent C is,
$cat test.c
unsigned long test(unsigned long h, unsigned long l, unsigned long d)
{
return((unsigned long)(((((unsigned long long)h)<<64)|l)/(unsigned long
long)d));
}
$clang -target aarch64-linux-gnu -O0 small.c -S
clang-3.7:
/home/kevin/llvm_trunk/llvm/lib/Target/AArch64/MCTargetDesc/AArch64AddressingModes.h:100:
unsigned int llvm::AArch64_AM::getShifterImm(AArch64_AM::ShiftExtendType,
unsigned int): Assertion `(Imm & 0x3f) == Imm && "Illegal shifted immedate
value!"' failed.</pre>
</div>
</p>
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