[LLVMbugs] [Bug 18549] New: crash with address_space(256)

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sun Jan 19 08:46:13 PST 2014


            Bug ID: 18549
           Summary: crash with address_space(256)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: arigo at tunes.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11895
  --> http://llvm.org/bugs/attachment.cgi?id=11895&action=edit
Preprocessed source

Attached an example where clang-trunk crashes with an assertion, when compiling
a program that makes heavy use of address_space(256):

SelectionDAGBuilder.cpp:4599: const char*
llvm::SelectionDAGBuilder::visitIntrinsicCall(const llvm::CallInst&, unsigned
int): Assertion
`cast<PointerType>(I.getArgOperand(0)->getType())->getAddressSpace() < 256 &&
cast<PointerType>(I.getArgOperand(1)->getType())->getAddressSpace() < 256 &&
"Unknown address space"

A preliminary guess is that it's a memcpy() inserted automatically by some
earlier pass.  All explicit memcpy() in the C source are with "char *" or "void
*" arguments with no address_space.

It always fails for me on Linux 64 when running "clang frame-22da9c.c",
apparently at any "-O" level.

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