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7178280: Failed new vector regression tests

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When looking for the same value in an other register check that all parts of that register has the same value.

Reviewed-by: johnc, twisti
This commit is contained in:
Vladimir Kozlov 2012-06-22 10:40:48 -07:00
parent 470db77b36
commit 6bc673930f
1 changed files with 4 additions and 4 deletions
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8
hotspot/src/share/vm/opto/postaloc.cpp
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@ -308,9 +308,10 @@ int PhaseChaitin::elide_copy( Node *n, int k, Block *current_block, Node_List &v
}
Node *vv = value[reg];
if (n_regs > 1) { // Doubles check for aligned-adjacent pair
if( (reg&1)==0 ) continue; // Wrong half of a pair
if( vv != value[reg-1] ) continue; // Not a complete pair
if (n_regs > 1) { // Doubles and vectors check for aligned-adjacent set
uint last = (n_regs-1); // Looking for the last part of a set
if ((reg&last) != last) continue; // Wrong part of a set
if (!register_contains_value(vv, reg, n_regs, value)) continue; // Different value
}
if( vv == val || // Got a direct hit?
(t && vv && vv->bottom_type() == t && vv->is_Mach() &&
@ -573,7 +574,6 @@ void PhaseChaitin::post_allocate_copy_removal() {
// Record other half of doubles
uint def_ideal_reg = def->ideal_reg();
int n_regs = RegMask::num_registers(def_ideal_reg);
bool is_vec = RegMask::is_vector(def_ideal_reg);
for (int l = 1; l < n_regs; l++) {
OptoReg::Name ureg_lo = OptoReg::add(ureg,-l);
if (!value[ureg_lo] &&