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8010281: Remove code that is never executed

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Reviewed-by: kvn, roland
This commit is contained in:
Niclas Adlertz 2013-03-26 10:05:33 +01:00 committed by Nils Eliasson
parent 6964a690ed
commit 143a0039a3
1 changed files with 4 additions and 40 deletions
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44
hotspot/src/share/vm/opto/ifg.cpp
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@ -37,8 +37,6 @@
#include "opto/memnode.hpp"
#include "opto/opcodes.hpp"
#define EXACT_PRESSURE 1
//=============================================================================
//------------------------------IFG--------------------------------------------
PhaseIFG::PhaseIFG( Arena *arena ) : Phase(Interference_Graph), _arena(arena) {
@ -445,23 +443,15 @@ static void lower_pressure( LRG *lrg, uint where, Block *b, uint *pressure, uint
pressure[1] -= lrg->reg_pressure();
if( pressure[1] == (uint)FLOATPRESSURE ) {
hrp_index[1] = where;
#ifdef EXACT_PRESSURE
if( pressure[1] > b->_freg_pressure )
b->_freg_pressure = pressure[1]+1;
#else
b->_freg_pressure = (uint)FLOATPRESSURE+1;
#endif
if( pressure[1] > b->_freg_pressure )
b->_freg_pressure = pressure[1]+1;
}
} else if( lrg->mask().overlap(*Matcher::idealreg2regmask[Op_RegI]) ) {
pressure[0] -= lrg->reg_pressure();
if( pressure[0] == (uint)INTPRESSURE ) {
hrp_index[0] = where;
#ifdef EXACT_PRESSURE
if( pressure[0] > b->_reg_pressure )
b->_reg_pressure = pressure[0]+1;
#else
b->_reg_pressure = (uint)INTPRESSURE+1;
#endif
if( pressure[0] > b->_reg_pressure )
b->_reg_pressure = pressure[0]+1;
}
}
}
@ -526,17 +516,13 @@ uint PhaseChaitin::build_ifg_physical( ResourceArea *a ) {
if (lrg.mask().is_UP() && lrg.mask_size()) {
if (lrg._is_float || lrg._is_vector) { // Count float pressure
pressure[1] += lrg.reg_pressure();
#ifdef EXACT_PRESSURE
if( pressure[1] > b->_freg_pressure )
b->_freg_pressure = pressure[1];
#endif
// Count int pressure, but do not count the SP, flags
} else if( lrgs(lidx).mask().overlap(*Matcher::idealreg2regmask[Op_RegI]) ) {
pressure[0] += lrg.reg_pressure();
#ifdef EXACT_PRESSURE
if( pressure[0] > b->_reg_pressure )
b->_reg_pressure = pressure[0];
#endif
}
}
}
@ -589,30 +575,20 @@ uint PhaseChaitin::build_ifg_physical( ResourceArea *a ) {
RegMask itmp = lrgs(r).mask();
itmp.AND(*Matcher::idealreg2regmask[Op_RegI]);
int iregs = itmp.Size();
#ifdef EXACT_PRESSURE
if( pressure[0]+iregs > b->_reg_pressure )
b->_reg_pressure = pressure[0]+iregs;
#endif
if( pressure[0] <= (uint)INTPRESSURE &&
pressure[0]+iregs > (uint)INTPRESSURE ) {
#ifndef EXACT_PRESSURE
b->_reg_pressure = (uint)INTPRESSURE+1;
#endif
hrp_index[0] = j-1;
}
// Count the float-only registers
RegMask ftmp = lrgs(r).mask();
ftmp.AND(*Matcher::idealreg2regmask[Op_RegD]);
int fregs = ftmp.Size();
#ifdef EXACT_PRESSURE
if( pressure[1]+fregs > b->_freg_pressure )
b->_freg_pressure = pressure[1]+fregs;
#endif
if( pressure[1] <= (uint)FLOATPRESSURE &&
pressure[1]+fregs > (uint)FLOATPRESSURE ) {
#ifndef EXACT_PRESSURE
b->_freg_pressure = (uint)FLOATPRESSURE+1;
#endif
hrp_index[1] = j-1;
}
}
@ -769,16 +745,12 @@ uint PhaseChaitin::build_ifg_physical( ResourceArea *a ) {
if (lrg.mask().is_UP() && lrg.mask_size()) {
if (lrg._is_float || lrg._is_vector) {
pressure[1] += lrg.reg_pressure();
#ifdef EXACT_PRESSURE
if( pressure[1] > b->_freg_pressure )
b->_freg_pressure = pressure[1];
#endif
} else if( lrg.mask().overlap(*Matcher::idealreg2regmask[Op_RegI]) ) {
pressure[0] += lrg.reg_pressure();
#ifdef EXACT_PRESSURE
if( pressure[0] > b->_reg_pressure )
b->_reg_pressure = pressure[0];
#endif
}
}
assert( pressure[0] == count_int_pressure (&liveout), "" );
@ -794,21 +766,13 @@ uint PhaseChaitin::build_ifg_physical( ResourceArea *a ) {
// the whole block is high pressure.
if( pressure[0] > (uint)INTPRESSURE ) {
hrp_index[0] = 0;
#ifdef EXACT_PRESSURE
if( pressure[0] > b->_reg_pressure )
b->_reg_pressure = pressure[0];
#else
b->_reg_pressure = (uint)INTPRESSURE+1;
#endif
}
if( pressure[1] > (uint)FLOATPRESSURE ) {
hrp_index[1] = 0;
#ifdef EXACT_PRESSURE
if( pressure[1] > b->_freg_pressure )
b->_freg_pressure = pressure[1];
#else
b->_freg_pressure = (uint)FLOATPRESSURE+1;
#endif
}
// Compute high pressure indice; avoid landing in the middle of projnodes