crosstool-ng: patches/gcc/3.4.0/pr13250-fix.patch@ea15433daba0

Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.

Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive.

     1 See http://gcc.gnu.org/PR13250

     2 Fixes bad code generated when compiling SHA256 for SH processor

     4 ===================================================================

     5 RCS file: /cvs/gcc/gcc/gcc/config/sh/sh.md,v

     6 retrieving revision 1.171

     7 retrieving revision 1.172

     8 diff -u -r1.171 -r1.172

     9 --- gcc/gcc/config/sh/sh.md	2004/05/10 23:25:13	1.171

    10 +++ gcc/gcc/config/sh/sh.md	2004/05/28 05:47:36	1.172

    11 @@ -2194,7 +2194,7 @@

    12  	parts[0] = gen_reg_rtx (SImode);

    13  	parts[1] = gen_reg_rtx (SImode);

    14  	emit_insn (gen_rotlsi3_16 (parts[2-choice], operands[1]));

    15 -	parts[choice-1] = operands[1];

    16 +	emit_move_insn (parts[choice-1], operands[1]);

    17  	emit_insn (gen_ashlsi3 (parts[0], parts[0], GEN_INT (8)));

    18  	emit_insn (gen_lshrsi3 (parts[1], parts[1], GEN_INT (8)));

    19  	emit_insn (gen_iorsi3 (operands[0], parts[0], parts[1]));

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112	ea15433daba0
permissions	-rw-r--r--