Your message dated Wed, 5 Jul 2006 23:45:48 +0200 with message-id <[EMAIL PROTECTED]> and subject line Bug#376213: [amd64] : compiler produces wrong code for << has caused the attached Bug report to be marked as done.
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--- Begin Message ---Package: gcc-4.1 Version: 4.1.1-5 Severity: important Justification: causes FTBS for at least one package (fftw) Hello ! I simply compile and run the program attached on my amd64 box, and I get the following results: iteration 0, iters = 1 iteration 1, iters = 2 iteration 2, iters = 4 iteration 3, iters = 8 iteration 4, iters = 16 iteration 5, iters = 32 iteration 6, iters = 64 iteration 7, iters = 128 iteration 8, iters = 256 iteration 9, iters = 512 iteration 10, iters = 1024 iteration 11, iters = 2048 iteration 12, iters = 4096 iteration 13, iters = 8192 iteration 14, iters = 16384 iteration 15, iters = 32768 iteration 16, iters = 65536 iteration 17, iters = 131072 iteration 18, iters = 262144 iteration 19, iters = 524288 iteration 20, iters = 1048576 iteration 21, iters = 2097152 iteration 22, iters = 4194304 iteration 23, iters = 8388608 iteration 24, iters = 16777216 iteration 25, iters = 33554432 iteration 26, iters = 67108864 iteration 27, iters = 134217728 iteration 28, iters = 268435456 iteration 29, iters = 536870912 iteration 30, iters = 1073741824 iteration 31, iters = 18446744071562067968 There definitely *is* a problem in the last iteration. I wonder if it is a compiler bug or a processor bug -- I can't speak assembler anymore. Regards, Vincent Fourmond -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.16 Locale: LANG=fr_FR, LC_CTYPE=fr_FR (charmap=ISO-8859-1) (ignored: LC_ALL set to en_GB) Versions of packages gcc-4.1 depends on: ii binutils 2.17-1 The GNU assembler, linker and bina ii cpp-4.1 4.1.1-5 The GNU C preprocessor ii gcc-4.1-base 4.1.1-5 The GNU Compiler Collection (base ii libc6 2.3.6-15 GNU C Library: Shared libraries ii libgcc1 1:4.1.1-5 GCC support library Versions of packages gcc-4.1 recommends: ii libc6-dev 2.3.6-15 GNU C Library: Development Librari ii libmudflap0-dev 4.1.1-5 GCC mudflap support libraries (dev ii libssp0-dev 4.1.1-5 GCC stack smashing protection libr -- no debconf information#include <stdio.h> int main() { unsigned long iters; int i; for (i = 0; i < 32; i++) { iters = 1 << (unsigned long) i; printf("iteration %d, iters = %lu\n", i, iters); } }
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--- Begin Message ---On Sat, Jul 01, 2006 at 12:38:35PM +0200, Vincent Fourmond wrote: > Oops, that explains a lot. Sorry for the noise, then, you probably can > close that bug. Yeah. Bastian -- Is truth not truth for all? -- Natira, "For the World is Hollow and I have Touched the Sky", stardate 5476.4.
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