[LLVMdev] Assertion failure (Bug 21609) in DwarfFile.cpp

[David Blaikie]

I believe duncan's fixed this recently in 235956 and 235955 - does ToT work
for you?

On Tue, Apr 28, 2015 at 7:07 PM, Sandeep Raju <srand48 at gmail.com> wrote:

> Hi Folks,
>
> I ran into this assertion failure while compiling a function with a
> large number of arguments:
>
> https://llvm.org/bugs/show_bug.cgi?id=21609
>
> I have coded up the fix as per David's suggestion (added a new header
> field for DIVariable to separate out ArgNo & LineNo). The proposed
> diff is attached to the bug.
>
> However, there are around 175 testcases across clang & llvm that need
> to be udpated to reflect the new schema. One such eg:
>

The debug info has changed substantially in the last few months - those
changes made a lot of churn to the test cases and, as a biproduct, made it
unnecessary to update any test cases for this change.


>
> diff --git a/test/Instrumentation/AddressSanitizer/debug_info.ll
> b/test/Instrumentation/AddressSanitizer/debug_info.ll
> index c0939c5..4112f14 100644
> --- a/test/Instrumentation/AddressSanitizer/debug_info.ll
> +++ b/test/Instrumentation/AddressSanitizer/debug_info.ll
> @@ -41,9 +41,9 @@ declare void @llvm.dbg.declare(metadata, metadata,
> metadata) nounwind readnone
>  !7 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !8,
> null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align
> 0, offset 0] [from ]
>  !8 = !{!9, !9}
>  !9 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [
> DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc
> DW_ATE_signed]
> -!10 = !{!"0x101\00p\0016777217\000", !5, !6, !9} ; [
> DW_TAG_arg_variable ] [p] [line 1]
> +!10 = !{!"0x101\00p\001\001\000", !5, !6, !9} ; [ DW_TAG_arg_variable
> ] [p] [line 1]
>  !11 = !MDLocation(line: 1, scope: !5)
> -!12 = !{!"0x100\00r\002\000", !13, !6, !9} ; [ DW_TAG_auto_variable ]
> [r] [line 2]
> +!12 = !{!"0x100\00r\002\000\000", !13, !6, !9} ; [
> DW_TAG_auto_variable ] [r] [line 2]
>
> Before I spend cycles updating the test cases, I wanted get a 'go
> ahead' from code owners.
>
> Please let me know.
>
> Thanks,
> Sandeep
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