[Bug other/21863] strange code generation

2005-06-01 Thread alonsoschaich at gmx dot de 

--- Additional Comments From alonsoschaich at gmx dot de  2005-06-01 17:50 
---
Created an attachment (id=9008)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9008&action=view)
precompiled code and assembly output

-save-temps

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21863

[Bug other/21863] New: strange code generation

2005-06-01 Thread alonsoschaich at gmx dot de 
Given the appended input this code gets generated by gcc 3.4 / 4.0 / 4.1 
version when launched by "g++ matrix.cpp -o matrix -O2 -Wall -Wextra -pedantic 
-std=c++98 -save-temps": 
 
.LCFI2: 
leal-48(%ebp), %ecx 
leal-88(%ebp), %ebx 
subl$100, %esp 
.LCFI3: 
movl$1, -48(%ebp) 
movl$2, -44(%ebp) 
andl$-16, %esp 
movl$3, -40(%ebp) 
movl$4, -36(%ebp) 
subl$16, %esp 
movl$5, -32(%ebp) 
movl$6, -28(%ebp) 
movl$7, -24(%ebp) 
movl$8, -20(%ebp) 
movl$9, -16(%ebp) 
movl$10, -12(%ebp) 
.p2align 4,,7 
 
could be replaced by 
.LCFI2: 
leal-48(%ebp), %ecx 
leal-88(%ebp), %ebx 
.LCFI3: 
movl$1, -48(%ebp) 
movl$2, -44(%ebp) 
movl$3, -40(%ebp) 
movl$4, -36(%ebp) 
movl$5, -32(%ebp) 
movl$6, -28(%ebp) 
movl$7, -24(%ebp) 
movl$8, -20(%ebp) 
movl$9, -16(%ebp) 
movl$10, -12(%ebp) 
.p2align 4,,7 
Since esp won't be accessed in the remaining program. 
 
gcc -v 
Using built-in specs. 
Target: i686-pc-linux-gnu 
Configured with: ../gcc-4.1-20050528/configure --prefix=/import/share/tools 
--with-local-prefix=/import/share/tools --with-arch=athlon 
--enable-version-specific-runtime-libs --enable-languages=c,c++ 
--program-suffix=-4.1 --disable-werror 
Thread model: posix 
gcc version 4.1.0 20050528 (experimental)

-- 
   Summary: strange code generation
   Product: gcc
   Version: 4.1.0
Status: UNCONFIRMED
  Severity: minor
  Priority: P3
 Component: other
AssignedTo: unassigned at gcc dot gnu dot org
    ReportedBy: alonsoschaich at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21863

[Bug inline-asm/19111] Alignment ignored if optimizing for size

2004-12-21 Thread alonsoschaich at gmx dot de 


-- 
   What|Removed |Added

  Known to fail||3.3.4 3.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19111

[Bug inline-asm/19111] Alignment ignored if optimizing for size

2004-12-21 Thread alonsoschaich at gmx dot de 

--- Additional Comments From alonsoschaich at gmx dot de  2004-12-21 16:33 
---
Created an attachment (id=7798)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7798&action=view)
.ii file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19111

[Bug inline-asm/19111] New: Alignment ignored if optimizing for size

2004-12-21 Thread alonsoschaich at gmx dot de 
Hello,   
   
Please correct me if this is just invalid code, but it compiles and runs   
perfectly when compiled with -O0, -O1, -O2 or when build with intelC...   
   
I've reduced it to this:   
   
int main()   
 {   
  float __attribute__((aligned(16))) aligned_field[4];   
 
   asm   
(   
 "leal%0,   %%edx\n" // load pointer to this->data[0]   
 "movaps (%%edx),  %%xmm0\n" // use aligned instruction   
 :   
 :"m"(aligned_field[0])   
 :"edx","xmm0"   
);   
   
  return 0;   
 }   
  
GDB tells the application crashes in movaps. If I use movups it works with  
-Os. If I do something __productive__ with the data in the field, the -O3  
binary doesn't crash, but I get false results, while -O2 and less work well. 
 
gcc -v says: 
 
Reading specs from /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/specs 
Configured with: /var/tmp/portage/gcc-3.4.3-r1/work/gcc-3.4.3/configure 
--enable-version-specific-runtime-libs --prefix=/usr 
--bindir=/usr/i686-pc-linux-gnu/gcc-bin/3.4.3 
--includedir=/usr/lib/gcc/i686-pc-linux-gnu/3.4.3/include 
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/3.4.3 
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/3.4.3/man 
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/3.4.3/info 
--with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/3.4.3/include/g++-v3 
--host=i686-pc-linux-gnu --disable-altivec --enable-nls 
--without-included-gettext --enable-__cxa_atexit --enable-clocale=gnu 
--with-system-zlib --disable-checking --disable-werror 
--disable-libunwind-exceptions --enable-shared --enable-threads=posix 
--disable-multilib --enable-java-awt=gtk 
--enable-languages=c,c++,f77,objc,java 
Thread model: posix 
gcc version 3.4.3 20041125 (Gentoo Linux 3.4.3-r1, ssp-3.4.3-0, pie-8.7.7)

-- 
   Summary: Alignment ignored if optimizing for size
   Product: gcc
   Version: 3.4.3
Status: UNCONFIRMED
  Severity: normal
  Priority: P2
 Component: inline-asm
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: alonsoschaich at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19111