A question about redundant PHI expression stmt

2012-02-24 Thread Jiangning Liu
Hi, For the small case below, there are some redundant PHI expression stmt generated, and finally cause back-end generates redundant copy instructions due to some reasons around IRA. int *l, *r, *g; void test_func(int n) { int i; static int j; static int pos, direction, di

Is it a bug when use “<<”if the operator is out of the size "0~63"

2012-02-24 Thread Yang Yueming
Case: #include #include long long abc = 0x01234567891abcde; long long xyz; int main () { xyz = abc << 65; printf("%llx\n", xyz); return 0; } The result of xyz should be "0"，but it is "2468acf123579bc" ,same as xyz = abc << 1,Why? So as for "i

Re: Is it a bug when use “<<”if the operator is out of the size "0~63"

2012-02-24 Thread Miles Bader
Yang Yueming writes: > long long abc = 0x01234567891abcde; > long long xyz; ... > xyz = abc << 65; ... > The result of xyz should be "0"，but it is "2468acf123579bc" ,same as > xyz = abc << 1,Why? Because the shift operators in C have an undefined result when the shift-count is larger than

Re: A question about redundant PHI expression stmt

2012-02-24 Thread Richard Guenther
On Fri, Feb 24, 2012 at 9:07 AM, Jiangning Liu wrote: > Hi, > > For the small case below, there are some redundant PHI expression stmt > generated, and finally cause back-end generates redundant copy instructions > due to some reasons around IRA. > > int *l, *r, *g; > void test_func(int n) > { >  

Re: Is it a bug when use “<<”if the operator is out of the size "0~63"

2012-02-24 Thread Jonathan Wakely
This question is not appropriate for this mailing list, questions about using GCC should be sent to the gcc-h...@gcc.gnu.org list, please take any follow up there, thanks. On 24 February 2012 08:34, Yang Yueming wrote: > > The result of xyz should be "0"，but it is "2468acf123579bc" ,same as  xyz =

Proposal: Make TYPE_HASH != TYPE_UID

2012-02-24 Thread Diego Novillo
Over in the pph branch we are having several failures due to TYPE_CANONICAL and the canonical types table. Entries of the canonical types table corresponding to user-generated types get saved on each pre-parsed header. We then read the table back in and register the hash codes corresponding

Re: Simulator testing for sh and sh64

2012-02-24 Thread Thomas Schwinge
Hi! On Thu, 23 Feb 2012 08:42:53 +0900, Kaz Kojima wrote: > Thomas Schwinge wrote: > > Kaz, is my understanding correct, that I simply use sh64-elf as target, > > and again the sh-sim board? Should I be setting a specific CPU when > > configuring GCC, or any other customization? > > I used sh6

inline assembly

2012-02-24 Thread reed kotler
For extended inline assembly, there are constraints. Some seem to be supported by all architectures and some specific to a particular architecture. Where are these defined in gcc source? Some seem to be in constraints.md and some not. Tia. Reed

gcc-4.6-20120224 is now available

2012-02-24 Thread gccadmin
Snapshot gcc-4.6-20120224 is now available on ftp://gcc.gnu.org/pub/gcc/snapshots/4.6-20120224/ and on various mirrors, see http://gcc.gnu.org/mirrors.html for details. This snapshot has been generated from the GCC 4.6 SVN branch with the following options: svn://gcc.gnu.org/svn/gcc/branches

Re: inline assembly

2012-02-24 Thread Ian Lance Taylor
reed kotler writes: > For extended inline assembly, there are constraints. Some seem to be > supported by all architectures and some specific to a particular > architecture. > > Where are these defined in gcc source? > > Some seem to be in constraints.md and some not. Machine-specific constraint