frontend bug?

2010-12-29 Thread Alex Turjan
Hi all, Im compiling the code bellow for x86 with gcc 4.4.3 and 4.5. Is it correct that at the end of main the value of variable b should have been 4? When executing I get value 3. #include "stdio.h" int *ptr; int inc(void){ (*ptr)++; return 1; } int main (void){ int a, b = 2; ptr

bug linear loop transforms

2010-03-29 Thread Alex Turjan
Im writing to you regarding a possible bug in linear loop transfor. The bug can be reproduce by compiling the attached c file with gcc.4.5.0 (20100204, 20100325) on x86 machine. The compiler flags that reproduce the error are: -O2 -fno-inline -fno-tree-ch -ftree-loop-linear If the compiler is ru