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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure for thinLTO + --save-temps + non-ascii file name"
href="https://bugs.llvm.org/show_bug.cgi?id=47902">47902</a>
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<th>Summary</th>
<td>Assertion failure for thinLTO + --save-temps + non-ascii file name
</td>
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>ELF
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jh7370.2008@my.bristol.ac.uk
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com
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<p>
<div>
<pre>I was writing a test based on an internal test that made sure the linker could
handle non-ascii filenames when LTO was used. Whilst experimenting with LLD's
--save-temps option, I noticed that the linker will assert when a Thin bitcode
file is passed in, with a non-ascii name (but not when the --save-temps option
is not specified, nor for regular LTO. This is the lit test I was writing:
; REQUIRES: x86
;; Show that both regular LTO and ThinLTO work correctly when an input file
uses
;; a non-ascii filename.
;; Regular LTO.
; RUN: llvm-as %s -o %t£.o
; RUN: ld.lld %t£.o -o %t --save-temps
; RUN: llvm-readelf -s %t | FileCheck %s
;; Thin LTO.
; RUN: opt -module-summary %s -o %t-thin£.o
; RUN: ld.lld %t-thin£.o -o %t-thin --save-temps
; RUN: llvm-readelf -s %t-thin | FileCheck %s
; CHECK: _start
target datalayout =
"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@_start = global i32 0
(The llvm-readelf lines probably would want replacing with checks that the
appropriate temporary files have been created). The following assertion is
fired when it gets to the thinLTO link.
Assertion failed: (Val & ~(~0U >> (32-NumBits))) == 0 && "High bits set!", file
C:\llvm\llvm-project\llvm\include\llvm/Bitstream/BitstreamWriter.h, line 204</pre>
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