On Apr 30, 2012, at 16:18 , Olivier Hainque wrote:
Can you formally relate those three representations and tell me why
VIEW_CONVERT_EXPR is useful (not only convenient because of less operands)
to use on lvalues (thus memory, compared to registers or constants)?
I have ideas on how they are
On May 3, 2012, at 12:24 , Richard Guenther wrote:
One area of potential difference came to mind yesterday: regarding the
processing of type alignment differences. VCE to more aligned (of the
same size) would make a temp copy to yield a correctly aligned object.
Would MEM_REF do that as
Hello Richard,
Thanks for the constructive exchange :-)
On Apr 26, 2012, at 10:48 , Richard Guenther wrote:
In particular, I'm pretty sure that we can get component
refs of integral modes that access a smaller range of bits
than what the mode conveys. It is common with packing or
rep
On Wed, Apr 25, 2012 at 11:29 PM, Olivier Hainque hain...@adacore.com wrote:
Thanks for your feedback Richard,
On Apr 25, 2012, at 16:16 , Richard Guenther wrote:
I think much better would be to simply disallow any toplevel
VIEW_CONVERT_EXPR of BLKmode,
Does that fix your problems, too? If
Hello,
For the PA(1).Z := 44; assignment in the attached Ada
testcase, we observe the gcc 4.5 SRA pass performing an
invalid transformation, turning:
struct {
system__pack_48__bits_48 OBJ;
} D.1432;
D.1432.OBJ = D.1435;
T1b.F = VIEW_CONVERT_EXPRstruct pt__point(D.1432);
into:
On Wed, Apr 25, 2012 at 3:37 PM, Olivier Hainque hain...@adacore.com wrote:
Hello,
For the PA(1).Z := 44; assignment in the attached Ada
testcase, we observe the gcc 4.5 SRA pass performing an
invalid transformation, turning:
struct {
system__pack_48__bits_48 OBJ;
} D.1432;
Thanks for your feedback Richard,
On Apr 25, 2012, at 16:16 , Richard Guenther wrote:
I think much better would be to simply disallow any toplevel
VIEW_CONVERT_EXPR of BLKmode,
Does that fix your problems, too? If so I prefer that.
Hmm, I think that this would fix the particular testscase
