Bug 690636

Summary: Differences in -02 vs. -O0
Product: Ghostscript Reporter: Marcos H. Woehrmann <marcos.woehrmann>
Component: GeneralAssignee: Marcos H. Woehrmann <marcos.woehrmann>
Status: RESOLVED INVALID    
Severity: normal Keywords: bountiable
Priority: P4    
Version: 0.00   
Hardware: PC   
OS: Linux   
Customer: Word Size: ---

Description Marcos H. Woehrmann 2009-07-17 09:06:16 UTC 
Per our discussion at yesterday's support meeting I ran a comparison of the
nightly regression files with -O2 and -O0.  These the files with differences on
my i7 box:

23-33.PS.pbmraw.72.0
23-33.PS.pdf.pkmraw.300.0
23-33.PS.pdf.ppmraw.300.0
23-33.PS.pdf.ppmraw.72.0
23-33.PS.pgmraw.72.0
23-33.PS.pkmraw.300.0
23-33.PS.pkmraw.300.1
23-33.PS.pkmraw.72.0
23-33.PS.ppmraw.300.0
23-33.PS.ppmraw.300.1
23-33.PS.ppmraw.72.0
30-11.PS.pbmraw.300.0
30-11.PS.pbmraw.300.1
30-11.PS.pbmraw.72.0
30-11.PS.pgmraw.300.0
30-11.PS.pgmraw.300.1
30-11.PS.pgmraw.72.0
30-11.PS.pkmraw.300.0
30-11.PS.pkmraw.300.1
30-11.PS.pkmraw.72.0
30-11.PS.ppmraw.300.0
30-11.PS.ppmraw.300.1
30-11.PS.ppmraw.72.0
Bug688631.pdf.pbmraw.300.0
Bug688631.pdf.pbmraw.300.1
Bug688631.pdf.pbmraw.72.0
Bug688631.pdf.pgmraw.300.0
Bug688631.pdf.pgmraw.300.1
Bug688631.pdf.pgmraw.72.0
Comment 1 Marcos H. Woehrmann 2009-07-24 22:42:14 UTC 
Bug688631.pdf appears to be indeterministic, multiple runs with -O2 produce different md5sums (as do 
multiple -O0 runs).
Comment 2 Marcos H. Woehrmann 2009-08-09 18:54:21 UTC 
I'm closing this bug, the three files that show differences between -O0 and -O2
also show up as indeterministic, so it's likely that that there aren't any
actual difference based on compiler optimization levels.