This is the mail archive of the gcc-bugs@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

C++ bug - x86, -ffloat-store and the glibc headers



Compiling...

#include <math.h>

...with `g++ -O2 -ffloat-store' on my IA-32 Red Hat Linux 6.1 system
produces many errors of the type...

/usr/include/bits/mathinline.h: In function `double asin (double)':
/usr/include/bits/mathinline.h:427: non-lvalue in assignment
/usr/include/bits/mathinline.h:368: non-lvalue in assignment
/usr/include/bits/mathinline.h: In function `float asinf (float)':
/usr/include/bits/mathinline.h:427: non-lvalue in assignment
/usr/include/bits/mathinline.h:368: non-lvalue in assignment
/usr/include/bits/mathinline.h: In function `long double asinl (long double)':
/usr/include/bits/mathinline.h:427: non-lvalue in assignment
/usr/include/bits/mathinline.h:368: non-lvalue in assignment
/usr/include/bits/mathinline.h: In function `double acos (double)':
/usr/include/bits/mathinline.h:427: non-lvalue in assignment
/usr/include/bits/mathinline.h:368: non-lvalue in assignment

`gcc -O2 -ffloat-store' does not exhibit this problem.

This is with the latest GCC source from cvs.

Here's the preprocessed file:

--- cut here ------------------------------------------------------------
begin 664 m.ii.gz
M'XL(")Y[CC@"`VTN:6D`[3UKD]NXD9^E7X&2SR[).^,1I?%X;&5\59?S!U>E
MLEO95"I7R49%2=10#D7I),HCQO%_#P"^03P:(#B>75,?[!&%?J"[T6B@F\`S
MY*#!]M5RT']&_KHZ'0]7FW`9G%;>U=:-_%?^`#^?]E&__LF>U2'7GAN=#MY1
M!MT7/(5]D.0AJC1`A+_I&PF'TRH^!.`.HWS[6H$2U`7$D$4\<1[CX]5RY:U!
M\JRQCU*.WTC13JLR2_HXGJI`:G2X.N(V0H4P)]=O)<*<,!HJ>HC*"F$PW(>G
MJV-T6BB$QM/MY,T;)3M).\&(29IXY\@[A&CP^P'Z@@2J76RBXY5_NO?FG]T`
MP"FJ?7V&;FY52*>DV70JY1;E@X6'C;3%>E=P^`Q=OU9`4U:NQU)6^.@EG"W=
M(#A"7)5$K"C3%T*KW6D1>"C_N,O=L?@VS'Z>S\\C\F"&1)#SN0(4`TL)'S>A
M*6$YJ(IPY!H3EH,""$^XX/$%TF4#C(@P)>/*7/^-U&^N_4;*-]>]6O6@\8:%
MYIO+VV\D<-]<XGXCD?OF,O>50E<X-[^!=_.;N3>_@7_SF_D9OX&'@XA<1M\[
M[PVIRR%+8TQ&?GT0HKE`FS!"+RFA7>B%D9(C;60J=QNL%`@UF-/%I>1M=V^H
M.#DD@*XS-J<LA571WNY6:Y$(LR]8QYM]=%#RHHM+Z;^P]K:.^5B2PD*4LF^@
ME'TSV@MST@N@#U$ZLOWN0:5.''(I6=)`HQ+,\?\/D>DD+@=5VJ(?[W>1#7%H
M(4KU)0NH%L8B48#FM*7DO4U@2EX.JK*%M;N0QM]D,H\.F\4I\N9S-*2-2!`9
M'J/Y'#<92>>]ILB5W`>[W<%0<"I8)6WLJ&U8L@Z>/'#*T)'Y.4&SP>'>NH;C
MLQN<O%%=U"4QCP0H&R$LR2W#1T2V"3>1Q^EJCK5N$F6#*!M;"2V685/$B:[I
M1ZAP+(ZPLGQ+@Z/#87>P,%@LH%>9[.K@;6V8K`X>Y91PW-R'F_5FZ88KXY4E
M!`-@$MCM8X(+W+5&^K9/3;"TJ8R4S;%D9!9'8'/,K)V4T+?%M`V6)?;TB;.D
M4!JS$(AH5TS*,2'E&)%B?%1NJ6IZ4D@IT=A$E+&1*&,34<9&HHR-11DK1:GP
M==YA;=!-,92TGQAL:49M:4(NN'>W6]>`H!102C(R)1FI2,K5:$H61+6O$O&\
M%#^7T>2;6F1^PRWW0,GKX2NL7,SGH>3O-:,*!:@JU@KQ+^X:__@XT40+Y`!>
M!,>![B9<P:E*!:Z+3!U:+MU@H<86JB-,'40PMD+YEBN0)Q`6UE3+D55YIXNU
M<6'8)`.BG2>Y]*DR%TTSW3?RI'L].?UX6>YUL'.C:AZHF/Z&V:\<7U(%3+)`
M$D@F$\.2+=;ANF3ED`JRD6M*5@ZI)COA0L<72),),!YV@#`\&>N]B=J-M=Y$
MZ<8Z5ZL<,L)(LM18TGX34?O&LO:;"-LWEK:O%+?<D?GFGLQOY,I\<U_F-_(J
MOKDW@PA;0MT[[\UHRP$%VST,<9I[YF-1)K)9?K1Q*1PK33W+\,%9TT6EXFQW
M;Z8R.:":JC,VIBL%55`F26>1]+(O@@0VRXDN*I6WHBEHX_$C!06H8V^NCGTC
MR@MCP@N@SU"YK?WN0:5'SK*.94@#BT(H)/=L.$W+(5462'/-%D2AA:>^]\,&
M2PM3<2@@N1EKEKBW"0R)RR$5-D`RRC)HG3V4VNS6%+>*=Y)P-A.:"E1%N5)3
M9&R_.FA$F>HT4;UF49@GJAOAX^Z*)-GD=;V?C?)-69:Z`5Y>EII1=9)%7EM*
M4K,68`&[PE1):MF"J>J@4;G_4GK9=)4(0:!V^&G"&-RO)IJV3TR9G4[SL?;'
M77/$XMQT2RS;8%AL29\X*P65$0MA*GDQEI!C0,@Q(<0XI=Q`E=2D@#*2L8$0
M8Q,AQ@9"C$V$&)L*,58*4>[9O,-:OXMB(%D?24[9B-;2@%B2U=0G)X63$8P,
M"48J@E+U&1(%T>RKA%O-&6=(E!EH@<AUL/'RSPR/)(=L%C,H(!515)X-?I18
MH05J:I^19XLM1(O:N)0A(\G-JI&%RLA1!P^(J5"^1PKC"(1$G'7>E#>I6-,6
M!40R&-V<\^U$E7/^1AGG8!?><]\_+$K\A]4V'%?"0Y)D;I18F"P*GQV\WK;`
M#@0+B)W(M<$.!`N4G8D$4WR!&K!HA)D=B%R^K=B8+1.S8F&V#,R*?4'-"^X5
M2"+6BL9\6RKSK>C,MZ4TWXK6?*#:($[<M^/%?6MNW+?CQWUKGM.WX\GA2E-R
MY9WWS7F"(!%LCW&9HGEX&49E9I_/IR%>T`1#$_1JW+HLFZ&%<;R[;ZYZ"!(H
M-\[8"C\`-"".2#9(+OGJ(T']`)_/)LAA'ID6!U@9VP`T8!7O[:AX;XVCA16&
M%EK^#^::][L''0OA[`/PV37$"Q(HJ42P$"9!L,!&`:U):$6,QICK^XW\`'AA
M0Y0@+-R*"#Y3WB:PP!0$"\C>2$V#&I/.YI\@<K!#!]8G4@S17,@P-#".\&S5
MRA@R1:RHO@CXZ!K68#3#*JG$"$3]MU*/T1@[KRJ#:R9)]41@J3:#;S$6:(!,
MGA18M&+RIHAATUVI%,/&;@4<&7122\LNC"30W'K:)0^M`&EKO-M"KZ@&:8M]
M>\RKK/"3<(4(&Q@*^$H&F\^`TY`!IRD#C`MEC![(!0")FI6XH3+BILJ(&RHC
M;JJ,V(8R8J`R(%[:.ZR;B42%0"T34I'2F(=E0R:2HHEF;`!PJ!F)+#`2P1@!
MF(<%9C1XZ<.4Q%2V5)HJJV6DJM/'S*N<X?).JF":QVD@+*"H-Z]T^4;Q6<OT
MH?XOKY=I9070"#MP&4"J6/30A\`U@2EF#<9#2+Y#AU\-A(JJGD`ZR&2U/8%B
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MJCS`^"U7LSY5IP;'9+#<R@<=;B$<EH)+35`ZZF\@8$A:J;<)L3EXT*MNR(U(
M-VI4+/TV/A@MV=8C)%'E&"#LO.GID</\[+=9#]@R?7K&<W[O2R^;U*,3\3#X
MZ=T=&K\:H_^F_[XC0<(9O4\?.?31)?Z/#-K>5U2F6:H6I31IP>8P?5QE3]JT
M+?YJ<R`E'22DRS]6>06#V>2;F)-(G?O=PP2H>;8IG\7[S9&<'59U#71+:=:C
MGR+TXS;-JBMFE<;D>>1AK[0+<<!)(>@_24"QQ[/DL/)P1!B;%?";=2*CN[M*
M6$":[4=5OO"\ULL^Y>4(J5#:DK[L`C?:8-\V+[?I#0=K$@%Y@PIH#VMB<!<-
M"/5T7PT_&./O1#T7:'"B/YU'HQE#+E=V67:E%E]K3(H8+`%A)H-5[_GS8S0<
MC_X>_CT:U/HY6!_"%98@?OJ,2')X+AI6FIV7?@D#\^/QM$C(."."9WUPEV),
MD_/6H>0F_QAF+4?H$CE9\U)K5IQ8A'>)#(NRG%3"-;&F,.B'.S)&9D;BJ^A8
MQEC!1<XHP^=H5AX,96TKW"$9B%!_6&O;C=INU':C]G%&+6=")^/1)$H0P'6C
MN1O-W6AN;S33K9N;,6S]1A:N$U#38JQ_WFU6R>L*Y/K"83X$B]-@Z99W6/F.
MFYY',P9+WP@+W6H2N`'<X##K"7[$V`[$:=441A1$^4@L9[`.C]'Q`5NB>TZ?
MD.V6H/=?X_/U>'R!GC_W\E\^_:OGK#.X8+7?9'^[*V;(4-O/S#M]-'F'UON#
MMW5,*(?_ZDT6&>`QVC.XJWURW@UZA;$1.94&`9$,.P!2\6,?F4DN50!]0A"@
M6?^KT##6V8N*I=<U<XWF7^5FH8&C,XI?@U$$U1WN6D8@4VX_=Y+,KW)[@:+G
M8NTLZ$E94';+^'1R"YF?Q*%H\9:"1OPJ`DI#UR1RE4>MRD!5T"#RMGN1.06K
M8.+1F,?[QYF$.EAH./HYHY?D;87)T"L'0(/U]A24PZE2LT*]K';9,*Z$NF1O
M.3PW8./`<(*U4JL*US16RMHR7<-/6*X2$@81GF#$EJCS!5!0(JKB1^;E:"UI
MAR[3\#&/V>C3'ZK!6VKSU[HV7UI;)1>:JG='F7;U95E#\X98<,UZ?\V6:V*!
MU96%Q"+KZ$$K!7:!(-NER\X05F[1L0T[T_DN3:>VJ9.]C*JU3\0'ZDSJNS$I
MI(K=#"*W5N.VSI2>H"FEP1,_U(E<6*D`TZZ=G6K:=,)Y(>P4GH[>BKX1IKN]
MN,><`W87)R75L;)F-CTULGO9]2?*N(%MV,E7(P^3':*C-;GR@3JYLSOFU0_?
M.=`CJ,KNX0(I'4H-)GL?`Y6@=6,=OC/=$UI\?UT61NY,8_J83A,#S85"<;U4
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M@9P1^QM]FP^]O"L1K?+[_CUF:R9"R1%794@=N!WEDN-V$EDK#8N#R7D`\16T
MO+\<&>G18;;.XFRSJJ@/J]:2,?MHRHJU$D(^1OW2-0Y*10E;&:*T!6=:RA:3
MGYU2ZXK4?PNUY=D5>_"8C(6P'Y)UDT$W&72303<9=)/!-WEE(3O#M,DBD(^C
MK35@-V%T$T8W87031C=AM/E6S/7D6GO;B3DTAAP^G4P+Q8%4E8E$W9Z>ZH*]
M0>[S*S\=O.,IX!:9)&<646/!2`=5,25@1$ZH&#BHG'S($&-15/BMWG%57!8^
MS']B.J@&X/2P^.71.\@[^J<X0WS(-&`ZJP?,Z3C[^V-TOY)^XW2A.$-=N_=B
M4`M]+WINV''1CC$YH!M0_\,T8_*&*;G%:1-$FY`>^IUR0Q-ZO+V&]%)U16$,
MTTI-=BV@RZ@K/99<HV"$"Z'F)X#QDQ^4KE7-9X.G]"@9B9O>A%I>O=;<@E/?
MA&WY]$VHY]+K[9M[=(N]X_KD[+XS$W\N@K7ESIOU'4DME[P\JV&Y]>;-+1?C
M;,ERZ2N@&I;+:=_8<FWVCF=]^;6!!I8KA+5DN0W[CF21M)L4VX(ME].^N>D&
M*V>&DOJ>EDS8S8I>H3;,`VALQ&WTDV>0Q4VB!M8L!K9DSI:D('/'>/&M8]3U
MYC9L.@@GN)_GI8__3;976C%MS+R697/:6S#LUCK+,]'\0CL#\Q;"6K-NFZ)0
M&+DSUC3S&H`50[]_+$-WQKJF7H>P8>SWCVOLV6V)9N8N@K9G\/<V#5Y4]Y^L
M]M1O#[$->?79*=VT?'E(3ZC(]E3(#C>Z3#;BJ8CD9XRZV3I-^=Y-K64;G-7K
MV;-UE=8;*P(H6QPCD9*3A1%`R4Q#$&,"GB[2`[YE2LZ6-&HELRW;X*RNKFP)
MHJ=D/I0MCJM#N;9O=+P/M4\#X<+P=Z'.Z/U=[5C;;!]*9'_D(FF0_;$--=[E
M\LY;AQZRDAYM,IR7=\HX"93QJ]=8NL,4\BK_ZP=$<W$_I#A'5`6)A(9*BR8=
M@%ETK>6OHZ\UB\XO"=<:(P*HIRL#)'YUCMS;#K)NMJ%6;[.^IES->CU9#Y->
MT:R^IS!9PA7,9&LMOV$':E9#F-.W0P'4(W=,8ESDRGOHV]W67.=E>2S1D7$N
M)\?SR:`VDB9D))7&SZ7281*VP>]7VW.8;?>0]ZZR;_2&LVTWV4;/D>3%8GH7
M+\B":RT;OLE=K*N*ZS.._NX0I;5DRX>99OMHNY_)ZD!(U4=XC)8/Z/DXJ?K9
M)@?'/8Q&#"!%1HK9R)_H!1J?U]/U>H3^C?\:7X_',U*$)*,3K'(RF%!&!R-E
MCW>M@R:U/?*R)-G;[&+R(Z[W`[U]2)0/<P3UIIVA_,8-I?X68W[#MY8_%8%U
M!O0;-"!:%/?F5O/\YTK`[FT"6&3/-/QN[>DVM:?O:>HBR@<NH-B6G9U\=S,7
ML0&#=2H?JK.?W^S$5;MQ3W1'';/V2A4>K,@)N)6+!Q(=Q94#QI/?^Y+6LH/#
MI>?**,^_R]]]8"\?B3E'X!6G9@O/^\6K5.#)P-66UD_C[(Z^[HZ^+A]]K3B6
M>.N`#R9FFG:6VUGNXUHN[X!C>I&`_KG(7+#.HCN+;M^B47K_!C]`(+4]L$L&
M:BT;QN/)^ZWE%SS>)V_G7J89).?5M7,]<::O;R;3-]/QV]?CZ]O;\1_0J/J&
M8=;;NZ0LCY83)#O]#$$O.'J<%Y@![S>FUZ8%X:3\VF?E)=K:2Z',KZ2F:>]P
M?U2%W68+=:HNV%Q;;]JI]LFIMC9Q4*WI3T8BL$[E3T+E9#G\>O(:MAQ&DCI'
M6"+=-2Y"HB=-W*&*SGF+_6%J</2`B9<4ZJI4_%4\S4M3\@J5>%2<:<#4J:CK
M*7UX0:5AIOW)28!;@>F;%6XVRL0_"<G(\O0NN(S)A=4QT>XD'BNK-,@[0</J
MO)Z@>)KT1ETTZL.K1B&6;)55;CVH;U9&"C>YQEU`TJ/A@9;1H`@)-#HNDXDS
M&R.7PV0DT&-:KXJ9,1[I56VZ\"HDMTD9TJ/WD7L,NXDM-B]$>I2^H[XD!/#C
M_2[2/%JW!@,[7#</8TJCC59R)^PG+EQNDY2RYMF/=1C0Z8^FW-8L@=)O?#B9
M"(O&\60Z/4*2?8`%=!M@T?[-.I].X3]-#M=>GR.R%20(W8O8G.!OY08=(A[P
MJGOQ"'?H_+HDR5NN+HP6N8M'NRWGZ4NX="O.,W0S&8.3K7P7L#IX6\VIA071
M/K8=II@T,Q_L%@OOX*V:',_OB`Z+>Y3C^8FZ7[A)%CWKC>S,?GI:O[:S(EK1
MG'5K(+I'+G>*M*7(FF<CNFD<D`B0F!V7VBF[B;+)7N#-U&`O,!'H>A-N(J]<
MZ#+B7.FVW(7'B-[H5D70YR)("V22W9O*Z;5]+)@A^9Q"_!U]*72_FJ4,;?XV
M^66&OH[0%_SP'<'W=?2*/'9^Z2=B)>5.M^/QFGQ.=+]GA-Z_1U.'L/>5)K+X
M\PN];MX'%L7P&G^[E_&2U1U](//5&=.PX)+;^FGVD>-,$M[UPSX)Y-/INR09
MBT<GZ0`P(<MM+=\P2S=;V2TSSF;91+DUF9.'6B2O><OL<BP@Y<+$N,2@+70#
MI2<=9A\Z&;RY`8;NS]#TFGT9@#0C#29I=/\,78_?"-J0%LEIB\^0@P;;5TL,
,A[_]!T4S'1Y&`@$`
`
end
--- cut here ------------------------------------------------------------

AG

-- 
Anthony Green                                                        Red Hat
                                                       Sunnyvale, California

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]