[LLVMdev] Does llvm-db work?

[Chris Lattner]

On Tue, 15 Nov 2005, Yiping Fan wrote:
> Problem 1:
> I tried llvm-db of LLVM 1.6, in the Linux environment. However, it always
> prompts the following info for different tests:
> I am wondering if llvm-db in 1.6 still works?

I'm looking into this.  I can reproduce the problem and it appears that it 
was lost for 1.6.  I'll come up with a patch for CVS, sorry about this! :(

> Problem 2:
> I use llvm-gcc -g to compile this C program, and got the followed LLVM code
> (part). It seems that debug information for some statements are missing, i.e.,
> we don't know where the coressponding "+" statement is in the source code,
> from a "add" instruction in the LLVM code. Can anyone comment on this? Thank
> you very much.

I can also look into this, but the first is the most important.  If you 
could, please file a bugzilla bug for each of these problems.

Thanks!

-Chris

> ======================================
> short test(short br_data_0,
> short br_data_1,
> short br_data_2,
> short br_data_3,
> short br_data_4,
> short br_data_5,
> short br_data_6,
> short br_data_7) {
>
> short sm07 = br_data_0 + br_data_7;
> short sm16 = br_data_1 + br_data_6;
> short sm25 = br_data_2 + br_data_5;
> short sm34 = br_data_3 + br_data_4;
> short s0734 = sm07 + sm34;
> short s1625 = sm16 + sm25;
>
> return s0734 + s1625;
> }
> ======================================
>
>
> ======================================
> short %test(short %br_data_0, short %br_data_1, short %br_data_2, short
> %br_data_3, short %br_data_4, short %br_data_5, short %br_data_6, short
> %br_data_7) {
> entry:
> %dbg.1 = tail call { }* %llvm.dbg.func.start( %lldb.global* %d.test ) ; <{
> }*> [#uses=1]
> %dbg.tmp.1 = tail call { }* %llvm.dbg.stoppoint( { }* %dbg.1, uint 10, uint
> 0, %lldb.compile_unit* %d.compile_unit ) ; <{ }*> [#uses=1]
> %dbg.tmp.3 = tail call { }* %llvm.dbg.stoppoint( { }* %dbg.tmp.1, uint 17,
> uint 0, %lldb.compile_unit* %d.compile_unit ) ; <{ }*> [#uses=1]
> %tmp.6 = add short %br_data_1, %br_data_0 ; <short> [#uses=1]
> %tmp.15 = add short %tmp.6, %br_data_2 ; <short> [#uses=1]
> %tmp.18 = add short %tmp.15, %br_data_3 ; <short> [#uses=1]
> %tmp.12 = add short %tmp.18, %br_data_4 ; <short> [#uses=1]
> %tmp.21 = add short %tmp.12, %br_data_5 ; <short> [#uses=1]
> %tmp.9 = add short %tmp.21, %br_data_6 ; <short> [#uses=1]
> %tmp.24 = add short %tmp.9, %br_data_7 ; <short> [#uses=1]
> %dbg.tmp.7 = tail call { }* %llvm.dbg.region.end( { }* %dbg.tmp.3 ) ; <{ }*>
> [#uses=0]
> ret short %tmp.24
> }
> ======================================
>

-Chris

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