[Linux Kernel] Aliasee should be either GlobalValue or bitcast of GlobalValue

[edwintorok]

Bugzilla Link	4066
Resolution	FIXED
Resolved on	Apr 25, 2009 16:28
Version	unspecified
OS	Linux
Blocks	llvm/llvm-bugzilla-archive#4068
Attachments	x.i
CC	@asl

Extended Description

clang -MD -MF drivers/hwmon/.w83l785ts.o.d -nostdinc -isystem include -Iinclude -I/home/edwin/builds/linux-2.6/arch/x86/include -include include/linux/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -O2 -m64 -march=core2 -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Iarch/x86/include/asm/mach-default -Wframe-larger-than=2048 -fno-stack-protector -fno-omit-frame-pointer -fno-optimize-sibling-calls -Wdeclaration-after-statement -Wno-pointer-sign -fwrapv -fno-dwarf2-cfi-asm -DMODULE -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(w83l785ts)" -D"KBUILD_MODNAME=KBUILD_STR(w83l785ts)" -c drivers/hwmon/w83l785ts.c -emit-llvm

Trying to get a reduced testcase.

[edwintorok]

Reduced testcase:

struct i2c_device_id {
};
static const struct i2c_device_id w83l785ts_id[] = {
};
extern const struct i2c_device_id __mod_i2c_device_table attribute ((unused, alias("w83l785ts_id")));

Aliasee should be either GlobalValue or bitcast of GlobalValue
%struct.i2c_device_id* @​__mod_i2c_device_table
Broken module found, compilation aborted!
0 clang-cc 0x000000000104471f
1 clang-cc 0x0000000001044b15
2 libpthread.so.0 0x00007f94388c07b0
3 libc.so.6 0x00007f9437be0105 gsignal + 53
4 libc.so.6 0x00007f9437be1623 abort + 387
5 clang-cc 0x0000000001007c27
6 clang-cc 0x0000000000fdc911
7 clang-cc 0x0000000000fdc9d9
8 clang-cc 0x000000000043ad4c
9 clang-cc 0x000000000043b367
10 clang-cc 0x00000000005a974c
11 clang-cc 0x0000000000477465
12 clang-cc 0x000000000047db82 main + 2450
13 libc.so.6 0x00007f9437bcc5a6 __libc_start_main + 230
14 clang-cc 0x000000000042abc9
Stack dump:
0. Program arguments: /usr/local/bin/../libexec/clang-cc -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name testcase-min.i --relocation-model static --disable-fp-elim --unwind-tables=1 --fmath-errno=1 -fdiagnostics-show-option -o /tmp/cc-ftLIXo.s -x cpp-output testcase-min.i

1.  <eof> parser at end of file
   

2.  Per-function optimization
   

[llvmbot]

Increasing 'severity' one notch, because this blocks compilation of a large amount of Linux kernel code.

[lattner]

Fixed here:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090420/076698.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090420/076699.html

[edwintorok]

mentioned in issue llvm/llvm-bugzilla-archive#4068