Address-space casts cause LLVM assertion

[Quuxplusone]

Bugzilla Link	PR10865
Status	NEW
Importance	P normal
Reported by	Patrick Walton (:pcwalton) (pcwalton@mimiga.net)
Reported on	2011-09-05 14:00:41 -0700
Last modified on	2011-09-06 14:02:56 -0700
Version	unspecified
Hardware	PC Linux
CC	efriedma@quicinc.com, llvm-bugs@lists.llvm.org
Fixed by commit(s)
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This code causes an LLVM assertion ("Pointer must be a pointer to Val type"
during generation of a StoreInst):

    #define MY_ADDRESS_SPACE    __attribute__((address_space(512)))
    void MY_ADDRESS_SPACE *x = (void MY_ADDRESS_SPACE *)malloc(123);

But this works fine:

    #define MY_ADDRESS_SPACE    __attribute__((address_space(512)))
    void MY_ADDRESS_SPACE *x = (void MY_ADDRESS_SPACE *)(uintptr_t)malloc(123);

Looks like clang isn't generating a bitcast instruction where one is needed,
and the intermediate uintptr_t forces the bitcast generation.

[Quuxplusone]

I can't reproduce this with clang trunk; can you build a trunk build and retest?

If the issue still reproduces with trunk, please provide a self-contained testcase.