<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Aren't the integer values supposed to be written endian-independently in the IR? I am suspicious about these differences.</div><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div><br></div></span></span></span></span></span></span></span></span></div></span></div><div><div>On 9 Nov 2008, at 01:25, Jay wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div class="hmmessage" style="font-size: 10pt; font-family: Verdana; ">Thanks for the tip/direction.<br> <br>Uncertain -- m3cgcat between AMD64_LINUX and MIPS64_OPENBSD are "the same" but for two systematic diffs:<br> <br> - AMD64_LINUX has a bunch of added calls to check_nil.<br> This is a "bug" in it, inoptimal but ok code, because "first readable address" is 0. It should probably be 4k. I should write a program that iterates starting at 0 to find the value.<br> (or better yet, cm3 should have a -configure option that does this? -- for configuration values for which there is a safe default; in general, imho, the targets should be auto configured via C, assuming there is a native development environment available).<br> <br> - some integers are different (again, systematically)<span class="Apple-converted-space"> </span><br> <br>AMD64_LINUX:<br> init_int 656 13 Int.64<br> init_chars 664 " typecode "<br> init_int 680 2 Int.64<br> init_var 688 v.1 0<br> init_int 696 13 Int.64<br> init_chars 704 " typeid "<br> init_int 720 2 Int.64<br> init_var 728 v.1 0<br> init_int 736 13 Int.64<br> init_chars 744 "RunMainBody: "<br> init_int 760 2 Int.64<br> init_var 768 v.1 0<br> init_int 776 19 Int.64<br> init_chars 784 "RunMainBody: exec: "<br> init_int 808 2 Int.64<br> init_var 816 v.1 0<br> init_int 824 17 Int.64<br> init_chars 832 "ExpandInitStack: "<br><br>MIPS64_OPENBSD:<br> <br> init_chars 664 " typecode "<br> init_int 680 8796093022208 Int.64<br> init_var 688 v.1 0<br> init_int 696 13 Int.64<br> init_chars 704 " typeid "<br> init_int 720 8796093022208 Int.64<br> init_var 728 v.1 0<br> init_int 736 13 Int.64<br> init_chars 744 "RunMainBody: "<br> init_int 760 8796093022208 Int.64<br> init_var 768 v.1 0<br> init_int 776 19 Int.64<br> init_chars 784 "RunMainBody: exec: "<br> init_int 808 8796093022208 Int.64<br> init_var 816 v.1 0<br><br>This 8796093022208 is 80000000000 aka 0000_0800_0000_0000, where little endian has 2.<br> <br>I don't know what these numbers represent.<br>I should look at other systems -- preferably a working 64 bit big endian system, if there are any.<br> <br>Could be flags/type with text literals?<br> <br>(Btw, I always leave the TextLiteral.i3 change on my system, lowering the maximum literal length to around 4gig even on 64 bit targets, so 32 bit can bootstrap 64 bit...need to fix the compiler here to do target arithmetic instead of host arithmetic...)<br> <br>Thanks,<br> - Jay<br><br><hr id="stopSpelling"><br>From:<span class="Apple-converted-space"> </span><a href="mailto:hosking@cs.purdue.edu">hosking@cs.purdue.edu</a><br>To:<span class="Apple-converted-space"> </span><a href="mailto:jay.krell@cornell.edu">jay.krell@cornell.edu</a><br>Date: Sat, 8 Nov 2008 22:55:54 +0000<br>CC:<span class="Apple-converted-space"> </span><a href="mailto:m3devel@elegosoft.com">m3devel@elegosoft.com</a><br>Subject: Re: [M3devel] m3_load/m3_store/bit_field_ref lose offset??<br><br>Have you checked to make sure that the pre-gcc IR makes sense? Does it see these values as 32-bit or 64-bit? The reason I ask is that there may be something wrong in your m3middle target specs that cause bad IR. Once we know the IR looks right then we can try and fix the problem.<br><div><br><div><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><div style="word-wrap: break-word; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><span class="EC_Apple-style-span" style="word-spacing: 0px; font: normal normal normal 12px/normal Helvetica; text-transform: none; color: rgb(0, 0, 0); text-indent: 0px; white-space: normal; letter-spacing: normal; border-collapse: separate; "><div><font class="EC_Apple-style-span" color="#0000ff"><font class="EC_Apple-style-span" face="Gill Sans"><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; ">Antony Hosking</span></span></font></font><font class="EC_Apple-style-span" face="Gill Sans"><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; "><span class="Apple-converted-space"> </span>|<span class="Apple-converted-space"> </span></span></span><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; ">Associate Professor</span></span><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="font-family: 'Gill Sans'; "> | Computer Science | Purdue University</span></span></font></div><div><font class="EC_Apple-style-span" face="GillSans-Light"><span class="EC_Apple-style-span" style="font-family: GillSans-Light; ">305 N. University Street | West Lafayette | IN 47907 | USA</span></font></div><div><font class="EC_Apple-style-span" face="Gill Sans" color="#0000ff"><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; ">Office</span></span></font><font class="EC_Apple-style-span" face="GillSans-Light"><span class="EC_Apple-style-span" style="font-family: GillSans-Light; "><span class="EC_Apple-style-span" style="font-family: GillSans-Light; "> +1 765 494 6001 |<span class="Apple-converted-space"> </span></span></span></font><font class="EC_Apple-style-span" face="Gill Sans" color="#0000ff"><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; "><span class="EC_Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; ">Mobile</span></span></font><font class="EC_Apple-style-span" face="GillSans-Light"><span class="EC_Apple-style-span" style="font-family: GillSans-Light; "><span class="EC_Apple-style-span" style="font-family: GillSans-Light; "><span class="Apple-converted-space"> </span>+1 765 427 5484</span></span></font></div><div><font class="EC_Apple-style-span" face="GillSans-Light"><br class="EC_khtml-block-placeholder"></font></div></span></span></span></span></span></span></span><br class="EC_Apple-interchange-newline"></span></div></span></div><br><div><div>On 8 Nov 2008, at 15:45, Jay wrote:</div><br class="EC_Apple-interchange-newline"><blockquote><div><br>truncated as usual...along with losing a lot of whitespace..<br>Let's see...<br><br><br>Tony, how about switching these #if's?<br>I explain some of why below.<br><br>static void<br>m3_store (tree v, int o, tree src_t, m3_type src_T, tree dst_t, m3_type dst_T)<br>{<br> tree val;<br>#if 0<br> if (o != 0 || TREE_TYPE (v) != dst_t) {<br> v = m3_build3 (BIT_FIELD_REF, dst_t, v, TYPE_SIZE (dst_t),<br> bitsize_int (o));<br> }<br>#else<br> /* failsafe, but inefficient */<br> if (o != 0 || TREE_TYPE (v) != dst_t) {<br> v = m3_build1 (ADDR_EXPR, t_addr, v);<br> v = m3_build2 (PLUS_EXPR, t_addr, v, size_int (o / BITS_PER_UNIT));<br> v = m3_build1 (INDIRECT_REF, dst_t,<br> m3_cast (build_pointer_type (dst_t), v));<br> }<br>#endif<br> TREE_THIS_VOLATILE (v) = 1; /* force this to avoid aliasing problems */<br> val = m3_cast (src_t, EXPR_REF (-1));<br> if (src_T != dst_T) {<br> val = m3_build1 (CONVERT_EXPR, dst_t, val);<br> }<br> add_stmt (build2 (MODIFY_EXPR, dst_t, v, val));<br> EXPR_POP ();<br>}<br>m3_load (tree v, int o, tree src_t, m3_type src_T, tree dst_t, m3_type dst_T)<br>{<br>#if 0<br> if (o != 0 || TREE_TYPE (v) != src_t) {<br> v = m3_build3 (BIT_FIELD_REF, src_t, v, TYPE_SIZE (src_t),<br> bitsize_int (o));<br> }<br>#else<br> /* failsafe, but inefficient */<br> if (o != 0 || TREE_TYPE (v) != src_t) {<br> v = m3_build1 (ADDR_EXPR, t_addr, v);<br> v = m3_build2 (PLUS_EXPR, t_addr, v, size_int (o / BITS_PER_UNIT));<br> v = m3_build1 (INDIRECT_REF, src_t,<br> m3_cast (build_pointer_type (src_t), v));<br> }<br>#endif<br> TREE_THIS_VOLATILE (v) = 1; /* force this to avoid aliasing problems */<br> if (src_T != dst_T) {<br> v = m3_build1 (CONVERT_EXPR, dst_t, v);<br> }<br> EXPR_PUSH (v);<br>}<br><br>I'm working on MIPS64_OPENBSD (OpenBSD on an SGI O2).<br>In an early version it seems that many loads/stores of global variables is wrong.<br>The "first" code affected is RTLinker_ExpandModuleTable.<br><br>PROCEDURE ExpandModuleTable () =<br> CONST InitialTableSize = 500;<br> VAR new_mods: ADDRESS; n_bytes: INTEGER;<br> BEGIN<br> IF (modules = NIL) THEN<br> (* first time... *)<br> max_modules := InitialTableSize;<br> modules := Cstdlib.malloc (InitialTableSize * BYTESIZE (RT0.ModulePtr));<br> IF (modules = NIL) THEN Cstdlib.abort (); END;<br> ELSE<br> n_bytes := max_modules * BYTESIZE (RT0.ModulePtr);<br> new_mods := Cstdlib.malloc (n_bytes + n_bytes);<br> IF (new_mods = NIL) THEN Cstdlib.abort (); END;<br> EVAL Cstring.memcpy (new_mods, modules, n_bytes);<br> Cstdlib.free (modules);<br> modules := new_mods;<br> INC (max_modules, max_modules);<br> END;<br> END ExpandModuleTable;<br><br>It should read back modules as NIL.<br>What happens is it reads back modules as not NIL,<br>and then max_modules should also be zero, but is "large", leading to malloc to fail,<br>and abort called.<br><br>The output of cm3cg -y is reasonable.<br>It indicates offset loads.<br><br>What is incorrect is that in many loads and stores, but not all, the<br>offsets are lost.<br><br>(923) begin_procedure<br> procedure RTLinker__ExpandModuleTable<br>RTLinker__ExpandModuleTable(924) set_source_line<br> source line 208<br>(925) load_nil<br>(926) store<br> store (M3_AJWxb1_new_mods) offset 0x0 src_t 0xb dst_t 0xb<br>(927) set_source_line<br> source line 207<br>(928) set_source_line<br> source line 210<br>(929) load_nil<br>(930) load<br> m3cg_load (MM_RTLinker): offset 0x440, convert 0xb -> 0xb<br><br>Here is the incorrect code:<br><br>.globl RTLinker__ExpandModuleTable<br>.stabd 46,0,0<br>.stabn 68,0,206,.LM108<br>.LM108:<br>.LFBB8:<br>.set nomips16<br>.ent RTLinker__ExpandModuleTable<br>RTLinker__ExpandModuleTable:<br>.frame $fp,64,$31 # vars= 32, regs= 3/0, args= 0, gp= 0<br>.mask 0xd0000000,-8<br>.fmask 0x00000000,0<br>daddiu $sp,$sp,-64<br>sd $31,56($sp)<br>sd $fp,48($sp)<br>sd $28,40($sp)<br>move $fp,$sp<br>lui $28,%hi(%neg(%gp_rel(RTLinker__ExpandModuleTable)))<br>daddu $28,$28,$25<br>daddiu $28,$28,%lo(%neg(%gp_rel(RTLinker__ExpandModuleTable)))<br>.LBB9:<br>.stabn 68,0,208,.LM109<br>.LM109:<br>sd $0,16($fp)<br>.stabn 68,0,210,.LM110<br>.LM110:<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<br>bne $2,$0,.L61<br>.stabn 68,0,212,.LM111<br>.LM111:<br>dla $3,MM_RTLinker<br>ld $2,128($3)<br>andi $2,$2,0x0<br>ori $2,$2,0x1f4<br>sd $2,128($3)<br>.stabn 68,0,213,.LM112<br>.LM112:<br>li $4,4000 # 0xfa0<br>jal malloc<br>sd $2,0($fp)<br>ld $4,0($fp)<br>dla $3,MM_RTLinker<br>ld $2,136($3)<br>andi $2,$2,0x0<br>or $2,$4,$2<br>sd $2,136($3) << OK, offset seems low, but it agrees with elsewhere<span class="Apple-converted-space"> </span><br>.stabn 68,0,214,.LM113<br>.LM113:<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<span class="Apple-converted-space"> </span><br>bne $2,$0,.L65<br>jal abort<br>b .L65<br>.L61:<br>.stabn 68,0,216,.LM114<br>.LM114:<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<span class="Apple-converted-space"> </span><br>dsll $2,$2,3<br>sd $2,8($fp)<br>.stabn 68,0,217,.LM115<br>.LM115:<br>ld $3,8($fp)<br>ld $2,8($fp)<br>daddu $2,$3,$2<br>move $4,$2<br>jal malloc<br>sd $2,0($fp)<br>ld $2,0($fp)<br>sd $2,16($fp)<br>.stabn 68,0,218,.LM116<br>.LM116:<br>ld $2,16($fp)<br>bne $2,$0,.L64<br>jal abort<br>.L64:<br>.stabn 68,0,219,.LM117<br>.LM117:<br>ld $4,16($fp)<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<br>ld $3,8($fp)<br>move $5,$2<br>move $6,$3<br>jal memcpy<br>sd $2,0($fp)<br>.stabn 68,0,220,.LM118<br>.LM118:<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<br>move $4,$2<br>jal free<br>.stabn 68,0,221,.LM119<br>.LM119:<br>ld $4,16($fp)<br>dla $3,MM_RTLinker<br>ld $2,136($3) << OK<br>andi $2,$2,0x0<br>or $2,$4,$2<br>sd $2,136($3) << OK<span class="Apple-converted-space"> </span><br>.stabn 68,0,222,.LM120<br>.LM120:<br>dla $2,MM_RTLinker<br>ld $3,0($2) << WRONG<br>dla $2,MM_RTLinker<br>ld $2,0($2) << WRONG<br>daddu $4,$3,$2<br>dla $3,MM_RTLinker<br>ld $2,128($3) << OK<br>andi $2,$2,0x0<br>or $2,$2,$4<br>sd $2,128($3) << OK<br>.L65:<br>.LBE9:<br>.stabn 68,0,224,.LM121<br>.LM121:<br>move $sp,$fp<br>ld $31,56($sp)<br>ld $fp,48($sp)<br>ld $28,40($sp)<br>daddiu $sp,$sp,64<br>j $31<br>.end RTLinker__ExpandModuleTable<br><br>Here is corrected code:<br><br>RTLinker__ExpandModuleTable:<br>.frame $fp,64,$31 # vars= 32, regs= 3/0, args= 0, gp= 0<br>.mask 0xd0000000,-8<br>.fmask 0x00000000,0<br>daddiu $sp,$sp,-64<br>sd $31,56($sp)<br>sd $fp,48($sp)<br>sd $28,40($sp)<br>move $fp,$sp<br>lui $28,%hi(%neg(%gp_rel(RTLinker__ExpandModuleTable)))<br>daddu $28,$28,$25<br>daddiu $28,$28,%lo(%neg(%gp_rel(RTLinker__ExpandModuleTable)))<br>.LBB9:<br>.stabn 68,0,208,.LM109<br>.LM109:<br>sd $0,16($fp)<br>.stabn 68,0,210,.LM110<br>.LM110:<br>dla $2,MM_RTLinker<br>daddiu $2,$2,136 << CORRECT (offset seems low, but at least it isn't zero)<span class="Apple-converted-space"> </span><br>ld $2,0($2)<br>bne $2,$0,.L61<br>.stabn 68,0,212,.LM111<br>.LM111:<br>dla $2,MM_RTLinker<br>daddiu $3,$2,128 << CORRECT<span class="Apple-converted-space"> </span><br>li $2,500 # 0x1f4<br>sd $2,0($3)<br>.stabn 68,0,213,.LM112<br>.LM112:<br>li $4,4000 # 0xfa0<br>jal malloc<br>sd $2,0($fp)<br>dla $2,MM_RTLinker<br>daddiu $3,$2,136 << CORRECT<span class="Apple-converted-space"> </span><br>ld $2,0($fp)<br>sd $2,0($3)<br>.stabn 68,0,214,.LM113<br>.LM113:<br>dla $2,MM_RTLinker<br>daddiu $2,$2,136 << CORRECT<span class="Apple-converted-space"> </span><br>ld $2,0($2)<br>bne $2,$0,.L65<br>jal abort<br>b .L65<br>.L61:<br><br>I still dump core with this change, but I get much further.<br>I have not tested this change at all otherwise -- i.e. on working platforms.<br><br>I have not debugged through the gcc/m3cg code to see why<br>the offsets are only sometimes lost, or why other platforms<br>have no problem. Is MIPS's "global pointer" unusual these days?<br>I know SPARC has similar, and all the non-x86, non-AMD64 NT platforms<br>had similar, but that's essentially nothing now (I'm not counting IA64).<br>I know Linux has PLT (procedure linkage table) and GOT (global offset table).<br>Same thing?<br>I haven't looked much at other MIPS ports yet.<br><br><a href="http://modula3.elegosoft.com/cgi-bin/cvsweb.cgi/cm3/m3-sys/m3cc/gcc/gcc/m3cg/parse.c.diff?r1=1.7;r2=1.8">http://modula3.elegosoft.com/cgi-bin/cvsweb.cgi/cm3/m3-sys/m3cc/gcc/gcc/m3cg/parse.c.diff?r1=1.7;r2=1.8</a><br><br>is what made it look about like it does -- in particularing using BIT_FIELD_REF.<br><br>1.7:<br><br>static void m3_load (v, o, src_t, src_T, dest_t, dest_T) /* GCC32OK */<br> tree v;<br> int o;<br> tree src_t, dest_t;<br> m3_type src_T, dest_T;<br>{<br> if (o == 0 && TREE_TYPE (v) == src_t) {<br> EXPR_PUSH (v);<br> } else {<br> tree adr = m3_build1 (ADDR_EXPR, t_addr, v);<br> if (o != 0) {<br> adr = m3_build2 (PLUS_EXPR, t_addr, adr, size_int (o / BITS_PER_UNIT));<br> }<br> EXPR_PUSH (m3_build1 (INDIRECT_REF, src_t,<br> m3_cast (build_pointer_type (src_t), adr)));<br> }<br>#if 1<br> if (src_T != dest_T) {<br> EXPR_REF (-1) = m3_build1 (CONVERT_EXPR, dest_t, EXPR_REF (-1));<br> }<br> if (debug_vars) {<br> const char *name = "noname";<br> if (v != 0 && DECL_NAME(v) != 0) {<br> name = IDENTIFIER_POINTER(DECL_NAME(v));<br> }<br> fprintf(stderr, " m3_load (%s): offset %d, convert %d -> %d\n", name,<br> o, src_T, dest_T);<br> }<br>#else<br> if (src_T != dest_T) {<br> if (IS_INTEGER_TYPE(dest_T) && dest_t != t_int) {<br> EXPR_REF (-1) = m3_build1 (CONVERT_EXPR, t_int, EXPR_REF (-1));<br> } else if (IS_WORD_TYPE(dest_T) && dest_t != t_word) {<br> EXPR_REF (-1) = m3_build1 (CONVERT_EXPR, t_word, EXPR_REF (-1));<br> } else if (IS_INTEGER_TYPE(dest_T) || IS_WORD_TYPE(dest_T)) {<br> /* okay */<br> } else {<br> fatal_error("m3load: cannot convert types: src_t %d dest_t %d\n",<br> src_T, dest_T);<br> }<br> }<br>#endif<br>}<br>static void<br>m3_store (v, o, src_t, dest_t) /* GCC32OK */<br> tree v;<br> int o;<br> tree src_t, dest_t;<br>{<br> tree lhs, rhs;<br> if (TREE_TYPE (EXPR_REF (-1)) == src_t) {<br> rhs = EXPR_REF (-1);<br> } else {<br> rhs = m3_cast (src_t, EXPR_REF (-1));<br> }<br> if (o == 0 && TREE_TYPE (v) == dest_t) {<br> lhs = v;<br> } else {<br> tree f = make_node (FIELD_DECL);<br> TREE_TYPE (f) = dest_t;<br> DECL_ALIGN (f) = TYPE_ALIGN (dest_t);<br> DECL_SIZE (f) = TYPE_SIZE (dest_t);<br> DECL_MODE (f) = TYPE_MODE (dest_t);<br> DECL_FIELD_OFFSET (f) = size_int (o / BITS_PER_UNIT);<br> DECL_FIELD_BIT_OFFSET (f) = bitsize_int (o % BITS_PER_UNIT);<br> DECL_FIELD_CONTEXT (f) = TREE_TYPE (v);<br> lhs = m3_build2 (COMPONENT_REF, dest_t, v, f);<br> }<br>#if 1<br> expand_assignment (lhs, m3_build1 (CONVERT_EXPR, dest_t, rhs), 0, 0);<br>#else<br> if (dest_t == NULL) {<br> expand_assignment (lhs, rhs, 0, 0);<br> } else {<br> expand_assignment (lhs, m3_build1 (CONVERT_EXPR, dest_t, rhs), 0, 0);<br> }<br>#endif<br> EXPR_POP ();<br>}<br><br>1.8:<br>static void<br>m3_load (tree v, int o,<br> tree src_t, m3_type src_T,<br> tree dst_t, m3_type dst_T) /* GCC32OK */<br>{<br> if (o == 0 && TREE_TYPE (v) == src_t) {<br> EXPR_PUSH (v);<br> } else {<br> EXPR_PUSH (m3_build3 (BIT_FIELD_REF, src_t, v, TYPE_SIZE (src_t),<br> bitsize_int (o)));<br> }<br> if (src_T != dst_T) {<br> EXPR_REF (-1) = m3_build1 (CONVERT_EXPR, dst_t, EXPR_REF (-1));<br> }<br> if (option_vars_trace) {<br> const char *name = "noname";<br> if (v != 0 && DECL_NAME(v) != 0) {<br> name = IDENTIFIER_POINTER(DECL_NAME(v));<br> }<br> fprintf(stderr, " m3_load (%s): offset %d, convert %d -> %d\n", name,<br> o, src_T, dst_T);<br> }<br>}<br>static void<br>m3_store (tree v, int o, tree src_t, tree dst_t) /* GCC32OK */<br>{<br> tree lhs, rhs;<br> if (TREE_TYPE (EXPR_REF (-1)) == src_t) {<br> rhs = EXPR_REF (-1);<br> } else {<br> rhs = m3_cast (src_t, EXPR_REF (-1));<br> }<br> if (o == 0 && TREE_TYPE (v) == dst_t) {<br> lhs = v;<br> } else {<br> lhs = m3_build3 (BIT_FIELD_REF, dst_t, v, TYPE_SIZE (dst_t),<br> bitsize_int (o));<br> }<br> if (src_t != dst_t) {<br> rhs = m3_build1 (CONVERT_EXPR, dst_t, rhs);<br> }<br> expand_assignment (lhs, rhs, 0, 0);<br> EXPR_POP ();<br>}<br><br>- Jay<br></div></blockquote></div><br><span><AMD64_LINUX_RTLinker.mc></span><span><MIPS64_OPENBSD_RTLinker.mc></span></div></div></span></blockquote></div><br></body></html>