http://llvm.org/bugs/show_bug.cgi?id=10286
Summary: Compiling code using labels as pointers produces
<badref>s in disassembly
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6840)
--> (http://llvm.org/bugs/attachment.cgi?id=6840)
C source and resulting bytecode disassembly
When compiling the attached program with clang -c -emit-llvm -m32, then
disassembling the result with llvm-dis -show-annotations, the produced LL (also
attached) contains <badref> instead of labels. Compiling straight away without
-emit-llvm and disassembling produces a valid program.
This happens on both 2.9 (from Arch Linux repositories) and trunk (built
manually). Trunk configured with:
../llvm/configure --disable-debug-symbols --enable-optimized
--disable-debug-runtime --disable-assertions --enable-multilib
--with-cxx-include-32bit-dir=/usr/lib32 -with-cxx-include-32bit-dir=/usr/lib
Works fine on llvm-gcc.
The code comes from the emscripten test suite
(https://github.com/kripken/emscripten), whose maintainer could not reproduce
the issue.
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