Re: Internal Compiler Error in gen_rtx_SUBREG,at emit-rtl.c:776 in CR16

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On 02/01/11 08:19, Ian Lance Taylor wrote:
> Sumanth Gundapaneni <Sumanth.Gundapaneni@xxxxxxxxxxxxxxx> writes:
> 
>> If I compile the test case with "-O2 -fno-inline", there was no ICE related
>> to subreg. Is "cse_local" phase related to -finline optimization.
> 
> Any RTL that can be created by inlining can also be created in other
> ways, so don't wory about inlining.  You need to find out specifically
> what is creating that insn.  I usually find it easiest to set a
> breakpoint on make_insn_raw with a breakpoint on cur_insn_uid (which is
> a macro, so you have to use the real expression) to find when the insn
> with a specific UID was created.
Tip: Place the breakpoint after the assignment:


  INSN_UID (insn) = cur_insn_uid++;

And you don't have to know the "cur_insn_uid" magic...

b <line> if insn.u.fld[0].rt_int == <some #>

Breakpoints on an insn's UID become second nature quickly if you do a
lot of RTL debugging.

jeff
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