https://llvm.org/bugs/show_bug.cgi?id=30431
Bug ID: 30431
Summary: error in backend: assembler label
L?xxx$parent_frame_offset can not be undefined (MSVC,
SEH-related)
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: reupenl...@forward.cat
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
While compiling my source tree under LLVM-4.0.0-r281648-win64.exe and MSVC
2015, the following compilation error happens for debug builds:
CL : fatal error : error in backend: assembler label
'L?query_cpu_feature_set@pfc@@YA_NI@Z$parent_frame_offset' can not be undefined
[F:\foobar2000\columns_ui\pfc\pfc.vcxproj]
This does not happen in release builds. This happens in previous versions of
LLVM/Clang too.
To reproduce, open a VS2015 x86 Native Tools command prompt and run:
git clone --recursive https://github.com/reupen/columns_ui.git
cd columns_ui
msbuild /m /p:PlatformToolset=LLVM-vs2014 /p:Platform=Win32
/p:Configuration=Debug /t:Rebuild vc14\columns_ui-public.sln
The problematic function is defined here:
https://github.com/reupen/pfc/blob/07bdb04d9eef8a03fada2c3ee6f364039cb4a1b5/cpuid.cpp#L7
Removing the usage of SEH makes the problem go away. Release builds also work.
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