From: SourceForge.net <no...@so...> - 2007-12-28 19:48:55
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Bugs item #1859849, was opened at 2007-12-28 11:48 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1859849&group_id=599 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: peephole optimizer Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Volatile Direct Pointer not optimized Initial Comment: Accessing memory using a construct like (* (volatile xdata TestStruct *)0xF000).Var1 (where TestStruct is a struct) generates a load of unnecessary assembler instructions if another as the first variable is accessed. mov r2,#0x00 mov r3,#0xF0 mov dpl,r2 mov dph,r3 inc dptr mov a,#0x04 movx @dptr,a instead of mov dptr,#0xF001 mov a,#0x03 movx @dptr,a Please see the attached test file. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1859849&group_id=599 |
From: SourceForge.net <no...@so...> - 2007-12-28 19:56:25
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Bugs item #1859849, was opened at 2007-12-28 20:48 Message generated for change (Comment added) made by hansiglaser You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1859849&group_id=599 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: peephole optimizer Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Volatile Direct Pointer not optimized Initial Comment: Accessing memory using a construct like (* (volatile xdata TestStruct *)0xF000).Var1 (where TestStruct is a struct) generates a load of unnecessary assembler instructions if another as the first variable is accessed. mov r2,#0x00 mov r3,#0xF0 mov dpl,r2 mov dph,r3 inc dptr mov a,#0x04 movx @dptr,a instead of mov dptr,#0xF001 mov a,#0x03 movx @dptr,a Please see the attached test file. ---------------------------------------------------------------------- Comment By: Johann Glaser (hansiglaser) Date: 2007-12-28 20:56 Message: Logged In: YES user_id=14698 Originator: NO Oops, forgot to login before submitting the bug. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1859849&group_id=599 |