reload_cse_simplify_operandss likes to change (compare REG (const_int 0)) to a
compare between registers on VAX, when it has a register at hand whose value is
zero. This pessimizes code and in some cases even introduces spurious compares
instead of using CC0.
/* -Os */
f(int count,double r,double *rho)
{
int i, j, miny, maxy, hy;
float help, d;
for (hy = miny; hy<= maxy; hy++)
while(j >=0)
if ( d <= r) abort ();
}
--
Summary: [cond-optab] reload_cse_simplify_operands complicates
code on vax
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bonzini at gnu dot org
OtherBugsDependingO 39714
nThis:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39724
