[llvm] r340583 - DebugInfo: Improve debug location merging

[Reid Kleckner via llvm-commits]

On Mon, Aug 27, 2018 at 6:43 PM David Blaikie <dblaikie at gmail.com> wrote:

> What did the assembly look like previously? the .cv_loc 2 1 8 0 must've
> been attached to some instruction, right? But an instruction that ended up
> optimized away too late? (after the loc directive had been generated)
>

No location info, for the arguments, or after the call.

.cv_loc 2 1 8 0                 # t.cpp:8:0
pushl %eax
pushl $0
pushl $"??_C at _00CNPNBAHC@?$AA@"
pushl $0
pushl $"??_C at _00CNPNBAHC@?$AA@"
calll "?b@@YAXPADH0JJ at Z"
Ltmp11:
.cv_fpo_endproc
Lfunc_end0:
                                        # -- End function
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