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* [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> @ 2003-05-26 20:07 ` dhazeghi@yahoo.com 2003-05-26 20:16 ` pinskia@physics.uc.edu ` (5 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: dhazeghi@yahoo.com @ 2003-05-26 20:07 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 ------- Additional Comments From dhazeghi@yahoo.com 2003-05-26 19:53 ------- Hello, with gcc 3.3, I get the following code: .file "01.i" .text .align 2 .global func2 .type func2, %function func2: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 0, uses_anonymous_args = 0 @ link register save eliminated. add r0, r0, r0, asl #1 mov r0, r0, asl #2 @ lr needed for prologue mov pc, lr .size func2, .-func2 .align 2 .global func .type func, %function func: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp stmfd sp!, {fp, ip, lr, pc} sub fp, ip, #4 bl func2 add r3, r0, r0, asl #1 rsb r0, r0, r3, asl #3 ldmea fp, {fp, sp, pc} .size func, .-func .align 2 .global main .type main, %function main: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp stmfd sp!, {r4, fp, ip, lr, pc} mov r0, #7 sub fp, ip, #4 bl func mov r4, r0 mov r0, #8 mov r4, r4, asl r0 bl func orr r4, r4, r0 mov r0, r4 ldmea fp, {r4, fp, sp, pc} .size main, .-main .ident "GCC: (GNU) 3.3 20030508 (prerelease)" with gcc mainline (20030508) I get: .file "01.i" .text .align 2 .global func2 .type func2, %function func2: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 0, uses_anonymous_args = 0 @ link register save eliminated. add r0, r0, r0, asl #1 mov r0, r0, asl #2 @ lr needed for prologue mov pc, lr .size func2, .-func2 .align 2 .global func .type func, %function func: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp stmfd sp!, {fp, ip, lr, pc} sub fp, ip, #4 bl func2 add r3, r0, r0, asl #1 rsb r0, r0, r3, asl #3 ldmea fp, {fp, sp, pc} .size func, .-func .align 2 .global main .type main, %function main: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp stmfd sp!, {r4, fp, ip, lr, pc} mov r0, #7 sub fp, ip, #4 bl func mov r4, r0, asl #8 mov r0, #8 bl func orr r0, r4, r0 ldmea fp, {r4, fp, sp, pc} .size main, .-main .ident "GCC: (GNU) 3.4 20030508 (experimental)" Can you determine whether this is an improvement, or whether the original problem still exists? Thanks, Dara ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> 2003-05-26 20:07 ` [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order dhazeghi@yahoo.com @ 2003-05-26 20:16 ` pinskia@physics.uc.edu 2003-06-03 10:19 ` alga@rgai.hu ` (4 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: pinskia@physics.uc.edu @ 2003-05-26 20:16 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 pinskia@physics.uc.edu changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING ------- Additional Comments From pinskia@physics.uc.edu 2003-05-26 20:08 ------- See Dara's question. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> 2003-05-26 20:07 ` [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order dhazeghi@yahoo.com 2003-05-26 20:16 ` pinskia@physics.uc.edu @ 2003-06-03 10:19 ` alga@rgai.hu 2003-06-03 10:40 ` dhazeghi@yahoo.com ` (3 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: alga@rgai.hu @ 2003-06-03 10:19 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 alga@rgai.hu changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |alga@rgai.hu ------- Additional Comments From alga@rgai.hu 2003-06-03 10:19 ------- >Can you determine whether this is an improvement, or whether the original >problem still exists? The problem is still present on mainline (20030530), but no optimization can be done for this example. I attached another example which shows the problem clearly. Anyway, We wrote down our idea about a possible solution. See: http://gcc.gnu.org/ml/gcc-patches/2003-03/msg01886.html Regards, Gabor Loki ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> ` (2 preceding siblings ...) 2003-06-03 10:19 ` alga@rgai.hu @ 2003-06-03 10:40 ` dhazeghi@yahoo.com 2003-11-09 1:12 ` [Bug optimization/9759] " pinskia at gcc dot gnu dot org ` (2 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: dhazeghi@yahoo.com @ 2003-06-03 10:40 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 dhazeghi@yahoo.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |NEW Ever Confirmed| |1 GCC build triplet| |i686-pc-linux-gnu GCC host triplet| |i686-pc-linux-gnu GCC target triplet| |arm-unknown-elf Last reconfirmed|0000-00-00 00:00:00 |2003-06-03 10:40:32 date| | ------- Additional Comments From dhazeghi@yahoo.com 2003-06-03 10:40 ------- Thanks for the feedback Gabor. Hopefully it won't be too long until some solution is adopted... ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/9759] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> ` (3 preceding siblings ...) 2003-06-03 10:40 ` dhazeghi@yahoo.com @ 2003-11-09 1:12 ` pinskia at gcc dot gnu dot org 2004-03-08 7:49 ` pinskia at gcc dot gnu dot org 2004-05-13 20:29 ` [Bug tree-optimization/9759] " pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu dot org @ 2003-11-09 1:12 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement Component|target |optimization Last reconfirmed|2003-06-03 10:40:32 |2003-11-09 01:12:45 date| | Summary|[arm] Combine cannot do its |Combine cannot do its job |job due to arithmetic |due to arithmetic expression |expression evaluation order |evaluation order http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/9759] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> ` (4 preceding siblings ...) 2003-11-09 1:12 ` [Bug optimization/9759] " pinskia at gcc dot gnu dot org @ 2004-03-08 7:49 ` pinskia at gcc dot gnu dot org 2004-05-13 20:29 ` [Bug tree-optimization/9759] " pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-03-08 7:49 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-08 07:49 ------- Suspending as this is fixed on the tree-ssa: int T.3; int T.2; <bb 0>: T.2 = func (7); T.3 = func (8); return T.2 << 8 | T.3; -- What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |SUSPENDED Target Milestone|--- |tree-ssa http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/9759] Combine cannot do its job due to arithmetic expression evaluation order [not found] <20030219170600.9759.lac@rgai.hu> ` (5 preceding siblings ...) 2004-03-08 7:49 ` pinskia at gcc dot gnu dot org @ 2004-05-13 20:29 ` pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-13 20:29 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-13 11:42 ------- Fixed for 3.5.0 by the merge of the tree-ssa. -- What |Removed |Added ---------------------------------------------------------------------------- Status|SUSPENDED |RESOLVED Component|rtl-optimization |tree-optimization Resolution| |FIXED Target Milestone|tree-ssa |3.5.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9759 ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2004-05-13 11:42 UTC | newest]
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[not found] <20030219170600.9759.lac@rgai.hu>
2003-05-26 20:07 ` [Bug target/9759] [arm] Combine cannot do its job due to arithmetic expression evaluation order dhazeghi@yahoo.com
2003-05-26 20:16 ` pinskia@physics.uc.edu
2003-06-03 10:19 ` alga@rgai.hu
2003-06-03 10:40 ` dhazeghi@yahoo.com
2003-11-09 1:12 ` [Bug optimization/9759] " pinskia at gcc dot gnu dot org
2004-03-08 7:49 ` pinskia at gcc dot gnu dot org
2004-05-13 20:29 ` [Bug tree-optimization/9759] " pinskia at gcc dot gnu dot org
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