Assertion failed: (StackTop == 0 && "Stack should be empty after a call!"), function handleSpecialFP, file X86FloatingPoint.cpp, line 952.

[pwo]

Bugzilla Link	3690
Resolution	DUPLICATE
Resolved on	Mar 01, 2009 17:41
Version	unspecified
OS	Windows XP
Blocks	llvm/llvm-bugzilla-archive#3696
Attachments	Pre-processed ldexp.c
CC	@asl

Extended Description

ccc -pipe -march=nocona -I/usr/src/lib/libc/include -I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/amd64 -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -DINET6 -I/usr/obj/usr/src/lib/libc -I/usr/src/lib/libc/resolv -DPOSIX_MISTAKE -I/usr/src/lib/libc/locale -DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP -DNS_CACHING -DSYMBOL_VERSIONING -fstack-protector -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c /usr/src/lib/libc/amd64/gen/ldexp.c
Assertion failed: (StackTop == 0 && "Stack should be empty after a call!"), function handleSpecialFP, file X86FloatingPoint.cpp, line 952.

[lattner]

This is a codegen bug, plz attach the -emit-llvm output, thanks!

[pwo]

-emit-llvm output

[pwo]

With -O2 this does not happen.

[asl]

As far as I can understand Chris' position: this is effectively "wontfix" until will happen in some apple-produced code. There are bunch of examples in bugzilla, when such sort of assertions happen for non-darwin targets (e.g. win64, linux, now - freebsd).

The only solution - is to alter sources not to use inline FP math even if this causes serious performance regression (for example, during libm compilation, when inline fp math seems to be the only sane way to support atan, etc).

*** This bug has been marked as a duplicate of bug #1251 ***

[lattner]

No, it's not that it is "won't fix", it is just a prioritization issue. After thinking about it a bit lately, I think the previous "show-stopper" problems can be fixed by having the front-end do a little bit of help for the code generator.

This is not a "not going to fix" issue, it is just nasty and hairy and not fun to deal with, and I'm apparently the only one who works in this area...

[asl]

Sounds great! :) How should fe help in this area?

[EdSchouten]

mentioned in issue llvm/llvm-bugzilla-archive#3696

[asl]

mentioned in issue #1251