[LLVMbugs] [Bug 8512] New: incorrect IR representation for bool vectors

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Oct 29 19:09:21 PDT 2010


           Summary: incorrect IR representation for bool vectors
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: zx_y at mail.ru
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=5705)
 --> (http://llvm.org/bugs/attachment.cgi?id=5705)
test illustrating the problem

Generation of IR from the following code

typedef bool v128b __attribute__ ((vector_size (16)));
int main() {
  v128b v1;


define i32 @main() nounwind {
  %v1 = alloca <16 x i1>, align 16
  ret i32 0

<16 x i1> is insufficient for 16-byte vector.

Attached is the test that compiles under GCC but gives assert under clang
because of the wrong bool vector size:

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