c++ - Can massive nested loops cause the linker to run endlessly when compiling in Release-Mode? -

-

i'm compiling small win32 command-line application in vs2010 release-mode, speed optimizations turned on (not memory optimizations).

this application designed serve single purpose - perform single pre-defined complex mathematical operation find complex solution specific problem. algorithm functional (confirmed) , compiles , runs fine in debug-mode. however, when compile in release-mode (the algorithm large enough make use of optimizations), link.exe appears run endlessly, , code never finishes linking. sits @ 100% cpu usage, no changes in memory usage (43,232 k).

my application contains 2 classes, both of pretty short code files. however, algorithm comprises 20 or nested loops inline function calls within each layer. linker attempting run though every possible path through these loops? , if so, why debug-mode linker not having problems?

this tiny command-line application (2kb exe file), , compiling shouldn't take more couple minutes. i've waited 30 minutes far, no change. i'm thinking letting link overnight, if is trying run through possible code paths in algorithm end linking decades without supercomputer handy.

what need linker out of endless cycle? possible such code create infinite link-loop without getting compiler-error prior link cycle?

edit:
jerry coffin pointed out should kill linker , attempt again. forgot mention in original post, have aborted build, closed , re-opened vs, , attempted build multiple times. issue consistent, haven't changed linker options of yet.
edit2:
neglected mention fact deleted "debug" , "release" folders , re-built scratch. same results.
edit3:
confirmed turning off function inlining causes linker function normally. problem need function inlining, performance-sensitive operataion minimal memory footprint. leads me ask, why inlining cause such problem occur?
edit4:
output displays during unending link cycle:

link:   generating code

edit5:
confirmed placing code single cpp file did not resolve issue.

nested loops affect linker in terms of link time code generation. there's tons of options determine how works in detail.

for start suggest disabling ltcg alltogether see if there's other unusual problem.

if links fine in release ltcg disabled can experiment inlining limits, intrinsics , optimization level.


Comments

Post a Comment

Popular posts from this blog

c# - How to set Z index when using WPF DrawingContext? -

-
how set z-index drawing object when using drawingcontext.drawxxx() methods? the object drawn last have higher z index. can't change index of drawn objects. way draw in order. if using wpf (as placed tag), can use, example, canvas control. create shapes need like polyline obj = new polyline(); //... // ... set properties of obj and add them canvas uielementcollection: yourcanvasname.children.add(obj); //or yourcanvasname.children.insert(i, obj); first items of collection have higher z index. advantages in way: no need redraw on window changes, can anytime move objects , change order.
Read more

razor - Is this a bug in WebMatrix PageData? -

-
i think may have found bug in webmatrix's pagedata, not sure. concerns how pass data partial page calling page. in webmatrix documentation (tutorials, e.g. " 3 - creating consistent look ", , example code), pagedata recommended mechanism pass data between pages (e.g. content page layout page, or partial page). however have found not work other way, pass data partial page calling page. modifying or adding entries in pagedata in partial page, not seem calling page. cutting right down simplest possible example, in test page may have this: @{ pagedata["test"] = "initial entry"; } <p>before calling partial page, test value @pagedata["test"]</p> @renderpage("_testpartial.cshtml") <p>after returning calling page, test value @pagedata["test"]</p> and in _testpartial.cshtml page might have this: @{ pagedata["test"] = "modified entry"; } <p>in partial page...
Read more

visual c++ - Using relative values in array sorting ( asm ) -

-
i need sort through array , sort each individual row in array in ascending order. doesn't seem going (surprise!) keep getting hit 2 errors: a2101: cannot add 2 relocatable labels , a2026: constant expected here's sort, makes sense me, think i'm still trying implement high-lvl language techniqes assembly. there way around not being able use relative values? (the array 7 rows 9 columns, btw). mov cx, 7; cx = number of rows outer: ; outer loop walk through rows push cx mov cx, 9 mov row, cx ;rows middle: ; middle-loop walk through columns push cx sub cx, 1 ;cx = cx-1 mov column, cx ;columns inner: ;inner loop - compare , exchange column values cmp marray[row*9 + column], marray[row*9 + column+1] xchg marray[row*9 + column+1], marray[row*9 + column] ; compare , exchange values marray table inc column loop inner pop cx loop mid...
Read more