[LLVMbugs] [Bug 1894] New: Landing pad label misplaced

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1894

           Summary: Landing pad label misplaced
           Product: libraries
           Version: trunk
          Platform: Macintosh
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nicolas.geoffray at lip6.fr
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1313)
 --> (http://llvm.org/bugs/attachment.cgi?id=1313)
Bug test case

This bug only happens when generating ppc code (by default it uses the list-td
scheduler. The other schedulers don't have this bug)

The landing pad label is placed after a few instructions that belong to a
landing pad basic block. I use the attached test case, which is not generated
by llvm-gcc.

Just run:
./Release/bin/llvm-as -f lp.ll
./Release/bin/llc -enable-eh -f -march=ppc32  lp.bc

For the unwind block, the code generated is:

BB1_2:  # unwind
        lis 3, printf at ha
        lis 4, .str at ha
        creqv 6, 6, 6
        la 5, printf at l(3)
        la 6, .str at l(4)

label3:
        li 4, 5
        li 30, 2
        ...

It should be:
BB1_2:  # unwind
label3:
        lis 3, printf at ha
        lis 4, .str at ha
        creqv 6, 6, 6
        la 5, printf at l(3)
        la 6, .str at l(4)
        li 4, 5
        li 30, 2
        ...


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