Compile the following code with: m68k-elf-gcc -c -O2 -mcpu=5272 lltest.c
--save-temps -v
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
long long fred;
void broken(int b)
{
fred = (long long)b;
}
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
The assembler will correctly report:
lltest.s:9: Error: operands mismatch -- statement `move.l 8(%fp),fred+4'
ignored
This is because this combination of modes ( move.l (d16,Ax),(xxx).L ) is
invalid on coldfires. You'll get the same error if you specify a different cpu.
The problem is in extendsidi2_mem in m68k.md. The change was introduced by
Roman Zippel here: http://gcc.gnu.org/ml/gcc-patches/2007-01/msg02475.html
I was able to work around the problem, and will attach the patch. The patch may
not be ideal in all circumstances but I believe it does fix the problem.
Jifl
--
Summary: m68k coldfire uses bad mode when extending long long
Product: gcc
Version: 4.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jifl-bugzilla at jifvik dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: m68k-elf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37905
