JIRA issue created
https://issues.apache.org/jira/browse/HARMONY-5595
2008/3/12, Mikhail Fursov <[EMAIL PROTECTED]>:
>
> Looks like the reason is that LabelInst gets its offset in IRBuilder only
> after next HIR inst is added to the block.
> In this case we see that ILOAD_0 is not represented as HIR inst, so
> LabelInst gets its offset from the second inst.
> This is bug in translator.
>
> The most simple fix is to move LabelInst bc-offset update from
> Inst* IRBuilder::appendInst(Inst* inst) {
> to
> void IRBuilder::setBcOffset(uint32 bcOffset)
>
> Anyway I think this problem is worth creating a JIRA issue.
>
>
>
>
>
> On Wed, Mar 12, 2008 at 2:11 PM, Nikolay Kurtov <[EMAIL PROTECTED]> wrote:
>
> > Here is the method's code
> >
> > public static byte func(byte val) {
> > byte result = 1;
> > switch (val) {
> > case 0:
> > for (int i = 0; i < 54321; i++) {
> > result += i;
> > }
> > break;
> > case 1:
> > result = (byte) (val + 45);
> > break;
> > case 4:
> > result = (byte) (val + 21);
> > break;
> > default:
> > result--;
> > break;
> > }
> > if (result < 30) {
> > result <<= 1;
> > } else {
> > result /= 2;
> > }
> > return result;
> > }
> >
> > 2008/3/12, Mikhail Fursov <[EMAIL PROTECTED]>:
> > >
> > > Nikolay, could you post a Java method here to reproduce the issue?
> > >
> > >
> > > On Wed, Mar 12, 2008 at 1:29 AM, Nikolay Kurtov <[EMAIL PROTECTED]>
> > wrote:
> > >
> > > > I compiled the same class with JET and OPT, and found a difference
> in
> > > > bytecode-mapping
> > > >
> > > > One of branches of switch goes to this code:
> > > > ;; 58) ILOAD_0
> > > > ;; 59) BIPUSH 45
> > > > ;; 61) IADD
> > > > ;; 62) I2B
> > > > ;; 63) ISTORE_1
> > > > ....
> > > > So, after the recompilation by OPT, the block should begin from
> > bcOffset
> > > > 58
> > > >
> > > > In OPT after translator I found in irdump the following block
> > > > Block L5:
> > > > Predecessors: ENTRY_L0
> > > > Successors: L8
> > > > I5:L5: bcmap:59
> > > > I34:ldci4 #45 -) t14:int32
> > > > I35:add t1, t14 -) t15:int32
> > > > I36:convi1 t15 -) t16:int32
> > > > I37:stvar t16 -) v1:int32
> > > > ....
> > > >
> > > > The block begins from bcOffset 59
> > > > I consider these values in JET and OPT should be equal.
> > > > Is it a bug?
> > > >
> > > > Now I'm exploring the code of JavaByteCodeTranslator and IRBuilder
> but
> > > > cannot figure out the cause of problem
> > > > Can you advise me how to fix it?
> > > >
> > > > --
> > > > Regards,
> > > > Nikolay
> > > >
> > > > mailto: [EMAIL PROTECTED]
> > > >
> > >
> > >
> > >
> > >
> > > --
> > >
> > > Mikhail Fursov
> > >
> >
> >
> >
> > --
> > Regards,
> > Nikolay
> >
> > mailto: [EMAIL PROTECTED]
> >
>
>
>
>
> --
>
> Mikhail Fursov
>
--
Regards,
Nikolay
mailto: [EMAIL PROTECTED]
