[LLVMbugs] [Bug 17998] New: Trunk/3.4 macro parsing issue (works in 3.3)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17998

            Bug ID: 17998
           Summary: Trunk/3.4 macro parsing issue  (works in 3.3)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dl9pf at gmx.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The following errors happen only in trunk/3.4 whereas 3.3 is fine:

/home/dl9pf/llvmlinux/targets/x86_64/src/linux/arch/x86/crypto/aesni-intel_glue.c:1348:1:
error: variable has incomplete type
      'const struct x86cpu_device_id'
MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
^
/home/dl9pf/llvmlinux/targets/x86_64/src/linux/include/linux/module.h:145:3:
note: expanded from macro 'MODULE_DEVICE_TABLE'
  MODULE_GENERIC_TABLE(type##_device,name)
  ^
/home/dl9pf/llvmlinux/targets/x86_64/src/linux/include/linux/module.h:88:33:
note: expanded from macro 'MODULE_GENERIC_TABLE'
extern const struct gtype##_id  __mod_##gtype##_table           \
                                ^
<scratch space>:61:1: note: expanded from here
__mod_x86cpu_device_table
^


The code looks like:

[...]
#define MODULE_GENERIC_TABLE(gtype,name)                        \
extern const struct gtype##_id  __mod_##gtype##_table           \
  __attribute__ ((unused, alias(__stringify(name))))
#else  /* !MODULE */
#define MODULE_GENERIC_TABLE(gtype,name)
#endif

[...]
#define MODULE_DEVICE_TABLE(type,name)          \
  MODULE_GENERIC_TABLE(type##_device,name)



Attached is the preprocessed  arch/x86/crypto/aesni-intel_glue.i .

It compiles with 3.3 and barfs with 3.4/trunk.

clang-3.3 -S aesni-intel_glue.i 
vs.
clang-3.4 -S aesni-intel_glue.i

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