[LLVMbugs] [Bug 6129] New: Explicit alignment not respected by PowerPC backend

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Sat Jan 23 22:00:12 PST 2010


           Summary: Explicit alignment not respected by PowerPC backend
           Product: libraries
           Version: trunk
          Platform: Other
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: PowerPC
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: whitehorn at wisc.edu
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=4103)
 --> (http://llvm.org/bugs/attachment.cgi?id=4103)
Test case

Compiling the attached test program with LLVM/clang results in bar, explicitly
marked for 128 byte alignment, not ending up 128-byte aligned.

Output on x86:
bar: 0x600a80
bar % 128: 0

Output on PowerPC:
bar: 0x1810870
bar % 128: 112

Output on PowerPC when compiled with gcc:
bar: 0x1810a80
bar % 128: 0

Declaration of bar from the produced LLVM IR:
@bar = common global [75 x i8] zeroinitializer, align 128 ; <[75 x i8]*>

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