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Commit 5b38501a authored by Austin Clements's avatar Austin Clements
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[dev.power64] 5g,6g,8g,9g: debug prints for regopt pass 6 and paint2 

Theses were very helpful in understanding the regions and
register selection when porting regopt to 9g.  Add them to the
other compilers (and improve 9g's successor debug print).

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/174130043
parent 9e7bed88
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Showing with 94 additions and 50 deletions
src/cmd/5g/opt.h
View file @ 5b38501a
......@@ -160,7 +160,7 @@ void prop(Reg*, Bits, Bits);
void synch(Reg*, Bits);
uint32 allreg(uint32, Rgn*);
void paint1(Reg*, int);
uint32 paint2(Reg*, int);
uint32 paint2(Reg*, int, int);
void paint3(Reg*, int, uint32, int);
void addreg(Adr*, int);
void dumpit(char *str, Flow *r0, int);
......
src/cmd/5g/reg.c
View file @ 5b38501a
......@@ -454,9 +454,13 @@ brk:
* replace code (paint3)
*/
rgp = region;
if(debug['R'] && debug['v'])
print("\nregisterizing\n");
for(i=0; i<nregion; i++) {
if(debug['R'] && debug['v'])
print("region %d: cost %d varno %d enter %d\n", i, rgp->cost, rgp->varno, rgp->enter->f.prog->pc);
bit = blsh(rgp->varno);
vreg = paint2(rgp->enter, rgp->varno);
vreg = paint2(rgp->enter, rgp->varno, 0);
vreg = allreg(vreg, rgp);
if(debug['R']) {
if(rgp->regno >= NREG)
......@@ -477,9 +481,6 @@ brk:
rgp++;
}
if(debug['R'] && debug['v'])
dumpit("pass6", &firstr->f, 1);
/*
* free aux structures. peep allocates new ones.
*/
......@@ -488,6 +489,15 @@ brk:
flowend(g);
firstr = R;
if(debug['R'] && debug['v']) {
// Rebuild flow graph, since we inserted instructions
g = flowstart(firstp, sizeof(Reg));
firstr = (Reg*)g->start;
dumpit("pass6", &firstr->f, 1);
flowend(g);
firstr = R;
}
/*
* pass 7
* peep-hole on basic block
......@@ -1189,7 +1199,7 @@ paint1(Reg *r, int bn)
}
uint32
paint2(Reg *r, int bn)
paint2(Reg *r, int bn, int depth)
{
Reg *r1;
int z;
......@@ -1213,6 +1223,9 @@ paint2(Reg *r, int bn)
r = r1;
}
for(;;) {
if(debug['R'] && debug['v'])
print(" paint2 %d %P\n", depth, r->f.prog);
r->act.b[z] &= ~bb;
vreg |= r->regu;
......@@ -1220,14 +1233,14 @@ paint2(Reg *r, int bn)
if(r->refbehind.b[z] & bb)
for(r1 = (Reg*)r->f.p2; r1 != R; r1 = (Reg*)r1->f.p2link)
if(r1->refahead.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
if(!(r->refahead.b[z] & bb))
break;
r1 = (Reg*)r->f.s2;
if(r1 != R)
if(r1->refbehind.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
r = (Reg*)r->f.s1;
if(r == R)
break;
......@@ -1344,6 +1357,8 @@ RtoB(int r)
int
BtoR(uint32 b)
{
// TODO Allow R0 and R1, but be careful with a 0 return
// TODO Allow R9. Only R10 is reserved now (just g, not m).
b &= 0x11fcL; // excluded R9 and R10 for m and g, but not R12
if(b == 0)
return 0;
......@@ -1442,12 +1457,14 @@ dumpit(char *str, Flow *r0, int isreg)
print(" (only)");
print("\n");
}
// r1 = r->s1;
// if(r1 != nil) {
// print(" succ:");
// for(; r1 != R; r1 = r1->s1)
// print(" %.4ud", (int)r1->prog->pc);
// print("\n");
// }
// Print successors if it's not just the next one
if(r->s1 != r->link || r->s2 != nil) {
print(" succ:");
if(r->s1 != nil)
print(" %.4ud", (int)r->s1->prog->pc);
if(r->s2 != nil)
print(" %.4ud", (int)r->s2->prog->pc);
print("\n");
}
}
}
src/cmd/6g/opt.h
View file @ 5b38501a
......@@ -156,7 +156,7 @@ void prop(Reg*, Bits, Bits);
void synch(Reg*, Bits);
uint32 allreg(uint32, Rgn*);
void paint1(Reg*, int);
uint32 paint2(Reg*, int);
uint32 paint2(Reg*, int, int);
void paint3(Reg*, int, uint32, int);
void addreg(Adr*, int);
void dumpone(Flow*, int);
......
src/cmd/6g/reg.c
View file @ 5b38501a
......@@ -389,9 +389,13 @@ brk:
* replace code (paint3)
*/
rgp = region;
if(debug['R'] && debug['v'])
print("\nregisterizing\n");
for(i=0; i<nregion; i++) {
if(debug['R'] && debug['v'])
print("region %d: cost %d varno %d enter %d\n", i, rgp->cost, rgp->varno, rgp->enter->f.prog->pc);
bit = blsh(rgp->varno);
vreg = paint2(rgp->enter, rgp->varno);
vreg = paint2(rgp->enter, rgp->varno, 0);
vreg = allreg(vreg, rgp);
if(rgp->regno != 0) {
if(debug['R'] && debug['v']) {
......@@ -406,9 +410,6 @@ brk:
rgp++;
}
if(debug['R'] && debug['v'])
dumpit("pass6", &firstr->f, 1);
/*
* free aux structures. peep allocates new ones.
*/
......@@ -417,6 +418,15 @@ brk:
flowend(g);
firstr = R;
if(debug['R'] && debug['v']) {
// Rebuild flow graph, since we inserted instructions
g = flowstart(firstp, sizeof(Reg));
firstr = (Reg*)g->start;
dumpit("pass6", &firstr->f, 1);
flowend(g);
firstr = R;
}
/*
* pass 7
* peep-hole on basic block
......@@ -1020,7 +1030,7 @@ paint1(Reg *r, int bn)
}
uint32
paint2(Reg *r, int bn)
paint2(Reg *r, int bn, int depth)
{
Reg *r1;
int z;
......@@ -1044,6 +1054,9 @@ paint2(Reg *r, int bn)
r = r1;
}
for(;;) {
if(debug['R'] && debug['v'])
print(" paint2 %d %P\n", depth, r->f.prog);
r->act.b[z] &= ~bb;
vreg |= r->regu;
......@@ -1051,14 +1064,14 @@ paint2(Reg *r, int bn)
if(r->refbehind.b[z] & bb)
for(r1 = (Reg*)r->f.p2; r1 != R; r1 = (Reg*)r1->f.p2link)
if(r1->refahead.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
if(!(r->refahead.b[z] & bb))
break;
r1 = (Reg*)r->f.s2;
if(r1 != R)
if(r1->refbehind.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
r = (Reg*)r->f.s1;
if(r == R)
break;
......@@ -1259,12 +1272,14 @@ dumpit(char *str, Flow *r0, int isreg)
print(" %.4ud", (int)r1->prog->pc);
print("\n");
}
// r1 = r->s1;
// if(r1 != R) {
// print(" succ:");
// for(; r1 != R; r1 = r1->s1)
// print(" %.4ud", (int)r1->prog->pc);
// print("\n");
// }
// Print successors if it's not just the next one
if(r->s1 != r->link || r->s2 != nil) {
print(" succ:");
if(r->s1 != nil)
print(" %.4ud", (int)r->s1->prog->pc);
if(r->s2 != nil)
print(" %.4ud", (int)r->s2->prog->pc);
print("\n");
}
}
}
src/cmd/8g/opt.h
View file @ 5b38501a
......@@ -174,7 +174,7 @@ void loopit(Reg*, int32);
void synch(Reg*, Bits);
uint32 allreg(uint32, Rgn*);
void paint1(Reg*, int);
uint32 paint2(Reg*, int);
uint32 paint2(Reg*, int, int);
void paint3(Reg*, int, uint32, int);
void addreg(Adr*, int);
void dumpone(Flow*, int);
......
src/cmd/8g/reg.c
View file @ 5b38501a
......@@ -358,18 +358,19 @@ brk:
* replace code (paint3)
*/
rgp = region;
if(debug['R'] && debug['v'])
print("\nregisterizing\n");
for(i=0; i<nregion; i++) {
if(debug['R'] && debug['v'])
print("region %d: cost %d varno %d enter %d\n", i, rgp->cost, rgp->varno, rgp->enter->f.prog->pc);
bit = blsh(rgp->varno);
vreg = paint2(rgp->enter, rgp->varno);
vreg = paint2(rgp->enter, rgp->varno, 0);
vreg = allreg(vreg, rgp);
if(rgp->regno != 0)
paint3(rgp->enter, rgp->varno, vreg, rgp->regno);
rgp++;
}
if(debug['R'] && debug['v'])
dumpit("pass6", &firstr->f, 1);
/*
* free aux structures. peep allocates new ones.
*/
......@@ -378,6 +379,15 @@ brk:
flowend(g);
firstr = R;
if(debug['R'] && debug['v']) {
// Rebuild flow graph, since we inserted instructions
g = flowstart(firstp, sizeof(Reg));
firstr = (Reg*)g->start;
dumpit("pass6", &firstr->f, 1);
flowend(g);
firstr = R;
}
/*
* pass 7
* peep-hole on basic block
......@@ -996,7 +1006,7 @@ paint1(Reg *r, int bn)
}
uint32
paint2(Reg *r, int bn)
paint2(Reg *r, int bn, int depth)
{
Reg *r1;
int z;
......@@ -1020,6 +1030,9 @@ paint2(Reg *r, int bn)
r = r1;
}
for(;;) {
if(debug['R'] && debug['v'])
print(" paint2 %d %P\n", depth, r->f.prog);
r->act.b[z] &= ~bb;
vreg |= r->regu;
......@@ -1027,14 +1040,14 @@ paint2(Reg *r, int bn)
if(r->refbehind.b[z] & bb)
for(r1 = (Reg*)r->f.p2; r1 != R; r1 = (Reg*)r1->f.p2link)
if(r1->refahead.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
if(!(r->refahead.b[z] & bb))
break;
r1 = (Reg*)r->f.s2;
if(r1 != R)
if(r1->refbehind.b[z] & bb)
vreg |= paint2(r1, bn);
vreg |= paint2(r1, bn, depth+1);
r = (Reg*)r->f.s1;
if(r == R)
break;
......@@ -1227,12 +1240,14 @@ dumpit(char *str, Flow *r0, int isreg)
print(" %.4ud", (int)r1->prog->pc);
print("\n");
}
// r1 = r->s1;
// if(r1 != nil) {
// print(" succ:");
// for(; r1 != R; r1 = r1->s1)
// print(" %.4ud", (int)r1->prog->pc);
// print("\n");
// }
// Print successors if it's not just the next one
if(r->s1 != r->link || r->s2 != nil) {
print(" succ:");
if(r->s1 != nil)
print(" %.4ud", (int)r->s1->prog->pc);
if(r->s2 != nil)
print(" %.4ud", (int)r->s2->prog->pc);
print("\n");
}
}
}
src/cmd/9g/reg.c
View file @ 5b38501a
......@@ -1322,7 +1322,6 @@ void
dumpit(char *str, Flow *r0, int isreg)
{
Flow *r, *r1;
int s1v, s2v;
print("\n%s\n", str);
for(r = r0; r != nil; r = r->link) {
......@@ -1334,10 +1333,8 @@ dumpit(char *str, Flow *r0, int isreg)
print(" %.4ud", (int)r1->prog->pc);
print("\n");
}
// If at least one successor is "interesting", print both
s1v = (r->s1 != nil) && (r->s1->prog != r->prog->link);
s2v = (r->s2 != nil) && (r->s2->prog != r->prog->link);
if(s1v || s2v) {
// Print successors if it's not just the next one
if(r->s1 != r->link || r->s2 != nil) {
print(" succ:");
if(r->s1 != nil)
print(" %.4ud", (int)r->s1->prog->pc);
......
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