Re: question on behavior of tree-ssa-ccp

2011-12-15 Thread Richard Guenther
On Thu, Dec 15, 2011 at 2:41 PM, Amker.Cheng wrote: > HI, > I encountered a case with below codes: > > int data_0; > int motion_test1(int data, int v) > { >        int i; >        int t, u; >    int x; > >        if (data) >                i = data_0 + x; >        else { >                v = 2; >

Re: question on behavior of tree-ssa-ccp

2011-12-15 Thread Amker.Cheng
Forgot the command line: arm-none-eabi-gcc -O2 -mthumb -mcpu=cortex-m3 -S test.c -o test.S -fdump-tree-all gcc is comfigured as arm-non-eabi, but I think it's independent of target. -- Best Regards.

question on behavior of tree-ssa-ccp

2011-12-15 Thread Amker.Cheng
HI, I encountered a case with below codes: int data_0; int motion_test1(int data, int v) { int i; int t, u; int x; if (data) i = data_0 + x; else { v = 2; i = 5; } t = data_0 + x; u = i;