http://llvm.org/bugs/show_bug.cgi?id=21903
Dimitry Andric <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|WORKSFORME |--- --- Comment #3 from Dimitry Andric <[email protected]> --- I got very similar crash report for the fontforge port [1], and this results in a crash, even with trunk r224516. Note that this only happens with assertions enabled! The resulting message is very similar, after BB dumps, it gives: *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: SplineIsLinear - basic block: BB#152 land.end.i573 (0x2b5254f8) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: SplineIsLinear - basic block: BB#156 land.end11.i579 (0x2b525644) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: SplineIsLinear - basic block: BB#159 if.then17.i588 (0x2b525790) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: SplineIsLinear - basic block: BB#160 if.else19.i593 (0x2b5257ec) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: SplineIsLinear - basic block: BB#162 if.then27.i600 (0x2b5258a4) *** Bad machine code: Using an undefined physical register *** - function: SplineIsLinear - basic block: BB#163 if.else32.i605 (0x2b525900) - instruction: FNSTSW16r %AX<imp-def>, %FPSW<imp-use,kill> - operand 1: %FPSW<imp-use,kill> fatal error: error in backend: Found 6 machine code errors. Specifically, the "FNSTSW16r %AX<imp-def>, %FPSW<imp-use,kill>" is precisely the same as in the Inkscape case. I think this must be some sort of bug in the (x87) floating point optimization. I will add a reduced test case after this comment. [1] http://pb2.nyi.freebsd.org/data/head-i386-PR195480-default/2014-12-15_22h55m50s/logs/errors/fontforge-20120731.b_7.log -- You are receiving this mail because: You are on the CC list for the bug.
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