2011/3/5 Ian Lance Taylor <iant@xxxxxxxxxx>:
> Xiaofeng <dolphin.feng@xxxxxxx> writes:
>
>> Does this mean we cannot obtain the scope information using the current framwork of gcc?
>
> You can get some sorts of scope information, but there is no clean
> mapping to the instruction stream. The instructions for different
> scopes are not properly nested.
>
>> Can we obtain this information from RTL?
>
> No, but you can look at the debug info.
>
> Ian
>
Because our exsiting assembler requires this scope information in the
assembler code.
For example (I mentioned this yesterday):
source code:
1:void main()
2:{
3: int i=1;
4: if (i>1)
5: {
6: i=2;
7: if(i == 2)
8: {
9: i=i+1;
10: i=3;
11: }
12: i=i-1;
13: }
14: i=i+1;
15:}
-----> assemeber code for statement 6, 7, and 9:
scope 2 ------------------------ we want to add this "scope" information
line 6 --
.LM3: |
MOV A,2 |
MOV Y+1,A |- for statement 6
MOV A,2 |
MOV Y+1,A --
line 7 --
.LM4: |- for statement 7
.... --
scope 3 ---------------------- we want to add this "scope" information
line 9 --
.LM5: |
INC Y+1 |- for statement 9
SZ [0AH].2 |
INC Y+1 --
Can you give us any suggestions on how to implement this, since gcc
has not this information ready.
Thank you very much
Stephen
