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From: petdr@cs.mu.OZ.AU To: gcc-gnats@gcc.gnu.org, debian-gcc@lists.debian.org Cc: mercury-bugs@cs.mu.OZ.AU Subject: optimization/8635: incorrect optimization of 0.0 * Infinity Date: Mon, 25 Nov 2002 14:16:00 -0000 [thread overview] Message-ID: <E18E7xx-0003wb-00@ceres.cs.mu.oz.au> (raw) >Number: 8635 >Category: optimization >Synopsis: incorrect optimization of 0.0 * Infinity >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Tue Nov 19 05:06:03 PST 2002 >Closed-Date: >Last-Modified: >Originator: Peter Ross >Release: 3.0.4 (Debian testing/unstable) >Organization: >Environment: System: Linux ceres 2.4.16 #1 Thu Dec 20 12:41:36 EST 2001 i686 Intel(R) Pentium(R) 4 CPU 1.60GHz GenuineIntel GNU/Linux Architecture: i686 host: i386-pc-linux-gnu build: i386-pc-linux-gnu target: i386-pc-linux-gnu configured with: ../src/configure -v --enable-languages=c,c++,java,f77,proto,objc --prefix=/usr --infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --enable-threads=posix --enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc i386-linux >Description: 0.0 * (DBL_MAX + DBL_MAX) is incorrectly optimized so that the result is 0.0 instead of Not a Number (NaN) at optimization level -O1 or greater. >How-To-Repeat: gcc -O1 float.i ./a.out 0 is output and NaN should be. begin 644 float.i.gz M'XL("``OVCT``V9L;V%T+FD`[1QK;]S&\;,._1%;&RUT\D6^AYX]I$6:**Y0 MV3)L)T#A&@3%6TJ,^+CP<9):^+]W]L5]DSPI`5+$%^1,[CQV=F9V=G9V3\_1 M##V+TR*L]Z-G(S0:C9Z3EI=-5;Y,\BAM5OAE5:^28O_F&0`6%,7\M&TV;8S# MNBEQU44^\K0._W1R11H&(D(>S#O$7.@,D>/)\7F.YM.3'JZ#AH$<?=H]>RSU M4+V,5C@>I&ZDO9E]/D='AUW<%R:E2V6.[JTF"]FE<(\1D.O9IS)JHY-%AXWF MS$I69TAML[5^G3<P1YJK;JT_1XM9E]OQSJF0O@DXEVJ78J3)U<OK*/J*_)LL M3H[@(6_N7\[W3P_W#U0>8#HAH1P>\#E])*-664AE=_18N2R/TC^:+4#JQ1/[ M&1)SZH<U!BK4Y%5RG>,52O(:5<E_<%`O/22M]X$=CY\BHNJLCQ\B\;KCI]C7 MIR=@?-#MIO9$N4KJZB71:==,06H?7WS\R3X.;$Y.GN0!OR.?GI]VNJR(OU9< MB&["$@5!$Y"'I0VO;HJRI@CTR8%!(@N!P[\.:%KDUQ1,'B#T!`&^KS%`BSP( MD!N=?@FV/S?AB@0M-Z&)+["?HP-S+=(5LI`Q4M<$\#D)7",1FC(1-$4Q*>![ M=N1DHF(U%IJF4?A>S)U,)#E#\.C&HU+X/CKP:]1OBI:PE4CH&^W!4[A:E094 M6`\>5W@#P)T=I($%YY47=NV$<:]*\L)+F!4K[`7F,-EN`8I4L#+6(HXMVG8H MJ0UE5&LNJP6H^,J[XQE'F2:90]:V1P*GJG>/1G8K/:DNFZ@>(?1?^!]Q,39A M^G'^:0DMG^$MK@3=#E)#`\-=<7-J(M,I`+:.A*T=JJN3#'=Y;86C(E]5'NJJ M#WYWE=YR1?S!A1"E171+W=`<$870(=LP(C1S7A9A=>@M?C"HG/,Y64?<!;10 MJP@'LK<Y&/+C1'FM#E]Q/0;DL]#I2G'E8J#XDD#H9A(G:3<3AN!DTF+!]'0@ ML.G#)ID%5ATIJ*(P#4NG,VEXC42T+`O?Z]H$&3Y9@6.D.&_M[\G_UO5-B<.5 MD0;Z_G/D@AJW*KK!JYY]UY&Y[=(IVR2'S78R$@(*UF$99L;<YY`R*<JD?J`Q M8,D2!W-?Z1PKRQ]TU89UD251H$PX(0>G#N*PJ@EX1"119W$-N\=J2:0#@,&) MP-=)3EX(QFCT69]/9B<K7$5EP%OW].8E5Y!)VV*%-3A'1>7C<0_7871#!,3+ MD::\=9$F$=6<2]TM%GF1E$E^@T'A%*3R*]:4/8L&9)EKPG)%WA0D$.26!MH* MUZ1Y4R0K$GU;@,:!MC(.GY$VO-JE/SIDG[U(M`RX`8B!-)U2X%V8U`DD=$A\ ME$Y)_.[HE.NYR;*'I4'5BNN9J@)7!&0VT;Q]9$&)*UQN0/7(^"@X4=%`YFHB M(/?(LZ"XRW&Y=/"Y37*['X[3H>BL5;341=;4^+Y7A12+]FJ2NLRNZJ_((UX( M@.`T<^X<S`#`]\4+9U;M0G;9L`T!0A`APX$S"!G1A^Z?CKJW[B//A#^_#+X_ MOSA#Y&LY`"\(=$Q'%(>-6W=Q68_E)GGPBKA\G%P;+)!%\:6$\)LH(71]NL!6 M:G-'TFA_'<Y3O$-W"4O(5"7]:N6$F5DBT]Q5G6LNWZ8C'%8I(^0'YJ1NZ?5J MW)>)\/C"T^QT^M3!_R*%-&.@OZX76S6@UK$Z"[U][BL[.)QV=V`0=RSF+`N! 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MA4G.&MC/.U"+E^1!\&-P%!PM7>W'P;&S_30X95?6U!:8HJ3?\5(#``LR=U6\ M%RJ5@0Z2J.B$>@]-]Z=CWA_+EG:?_>GZW_FSB4K&&?'9-:431U&'&#F'S_:/ ?3X^/3A>SQ<')T7PQ.SS&+Q;3$SK?_@<A&;$I5EP````` ` end >Fix: Compile with -O0. >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-11-19 13:06 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-11-25 14:16 petdr [this message] 2002-12-05 0:32 zlomek
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