Re: more hot-cold partitioning problems

[Caroline Tice <ctice at apple dot com>]

On Apr 14, 2004, at 10:21 AM, Richard Henderson wrote:

> > What I did *not* do (and in retrospect I can see that I should have)
> > was to run the SPEC tests with "-g".  I tend not to do that as it
> > slows down performance, which is what SPEC is usually about.
>
> This had better not be true.  If so, you've found a bug.  Using -g
> should not change generated code in ANY way for ANY reason.  Why?
> Because it means that you can no longer debug optimized code and be
> sure that you're actually debugging the optimized code.

Well it seems to be true.  When I run the SPECInt gzip test, without -g 
(on x86 Linux,
with partitioning), it finishes successfully.  When I add the "-g" flag 
to the spec test,
it fails on the second pass (after Training, when it is doing the 
partitioning) with:

zip.s:466: Error: subtraction of two symbols in different sections 
`text.unlikely' {text.unlikely section} - `.LFB26' {.text section} at 
file address 32
zip.s:525: Error: subtraction of two symbols in different sections 
`text.unlikely' {text.unlikely section} - `.Ltext0' {.text section} at 
file address 16
zip.s:528: Error: subtraction of two symbols in different sections 
`text.unlikely' {text.unlikely section} - `.Ltext0' {.text section} at 
file address 23
zip.s:529: Error: subtraction of two symbols in different sections 
`text.unlikely' {text.unlikely section} - `.Ltext0' {.text section} at 
file address 27
zip.s:552: Error: subtraction of two symbols in different sections 
`text.unlikely' {text.unlikely section} - `.Ltext0' {.text section} at 
file address 88
specmake: *** [gzip] Error 1

from zip.s:

Line 466:         .long   .LFE26-.LFB26
Line 525:         .long   .LVL8-.Ltext0
Line 528:         .long   .LVL8-.Ltext0
Line 529:         .long   .LFE26-.Ltext0
Line 552:         .long   .LVL10-.Ltext

Searching the zip.s file created from the run without "-g",  there are 
no symbols or labels in the file containing
"LFE", "LBE", or "Ltext".

-- Caroline