<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AVR] uint32_t is incorrectly compiled to i16"
href="https://bugs.llvm.org/show_bug.cgi?id=39210">39210</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[AVR] uint32_t is incorrectly compiled to i16
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>7.0
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Headers
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>aykevanlaethem@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>When compiling this function for avr:
#include <stdint.h>
uint32_t size32() {
return 3;
}
With the following options:
clang-7 --target=avr-atmel-none -emit-llvm -S -o intsize.ll -c intsize.c
I get the following IR (cut down to the essential parts):
target datalayout = "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8"
target triple = "avr-atmel-none"
; Function Attrs: noinline nounwind optnone
define dso_local i16 @size32() #0 {
ret i16 3
}
In other words, uint32_t is compiled to i16 instead of i32 as it should.
I hit this problem while trying to build compiler-rt for AVR and hitting lots
of "shift count >= width of type" warnings which are probably caused by this
problem.
I'm running Debian stable (stretch) with clang-7 from apt.llvm.org.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>