aprantl added inline comments.
================
Comment at: test/CodeGenObjC/debug-info-blocks.m:20
// CHECK: call {{.*}}, !dbg ![[DBG_LINE:[0-9]+]]
// CHECK-NOT: ret
// CHECK: load {{.*}}, !dbg ![[COPY_LINE:[0-9]+]]
----------------
vsk wrote:
> aprantl wrote:
> > What's the location used for the ret? I think it should also be`
> > ![[DBG_LINE]]` since we are not actually executing the block.
> We're using COPY_LINE, which is the same location used for the load
> instruction below.
>
> What's the semantic difference between DBG_LINE (line 0) and COPY_LINE (line
> 68) anyway? Why do we have two different locations for the arguments to this
> function?
The debugger will skip over line 0 locations when single-stepping or when
setting breakpoints. I can't tell without reading the code why we decide to put
a line 0 on the call.
https://reviews.llvm.org/D39310
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