Description of problem: While compiling skcms.cc from chromium 69 (the web browser) on x86-64, gcc exits with the error message "internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2259". Version-Release number of selected component (if applicable): Both gcc 5.4.x and 5.5.x have this problem (gcc 8 works). How reproducible: bug.cc ====== typedef float __attribute__((vector_size(16))) Fx4; typedef int __attribute__((vector_size(16))) I32x4; #define F0 Fx4{0,0,0,0} #define F1 Fx4{1,1,1,1} #define if_then_else(c,t,e) ( ((c) & (I32x4)(t)) | (~(c) & (I32x4)(e)) ) static inline __attribute__((always_inline)) Fx4 func(float d, Fx4 x) { Fx4 sign = (Fx4)if_then_else(x < 0, -F1, F1); return sign * (Fx4)if_then_else(x < d, x, x); } cmdline ======= g++ -c -std=c++11 bug.cc result ====== bug.cc: In function ‘Fx4 func(float, Fx4)’: bug.cc:7:47: internal compiler error: in verify_ctor_sanity, at cp/constexpr.c:2259 #define if_then_else(c,t,e) ( ((c) & (I32x4)(t)) | (~(c) & (I32x4)(e)) ) ^ bug.cc:12:24: note: in expansion of macro ‘if_then_else’ return sign * (Fx4)if_then_else(x < d, x, x); ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://bugs.mageia.org/> for instructions.
I can work around this problem by disabling the vector optimizations.
Assignee: bugsquad => basesystemCC: (none) => marja11, tmb
Thanks for the testcase... There is now a gcc-5.5.0-2.mga6 currently building that passes the testcase build
Blocks: (none) => 23558
Thanks, that appears to work, but... when enabling debug info, gcc crashes on the same source file in a very different place (debug info generation). Anyway, debug info is normally disabled for all chromium builds, I only enabled it because the build (with vector optimization disabled in this specific module) crashes at startup. But debugging chromium is quite impossible because gcc generates more than 4GiB of .debug_info while it assumes offsets into that section fit in 32 bits. With a patched gcc (and rebuilt glibc), the build succeeds but gdb refuses to read the debug info. Building with mga6 clang did not work either. Is there a simple way to build a gcc8 package on mga6? I guess using gcc5 libstdc++ is not possible...
Blocks: 23558 => (none)
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Resolution: (none) => OLDStatus: NEW => RESOLVEDCC: (none) => ouaurelien