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1.1 ! root 1: #include <stdio.h> ! 2: # ! 3: /* use inarc, dom, and head to build tree representing structure of program. ! 4: Each node v has CHILDNUM(v) children denoted by ! 5: LCHILD(v,0), LCHILD(v,1),... ! 6: RSIB((v) is right sibling of v or UNDEFINED; ! 7: RSIB(v) represents code following v at the same level of nesting, ! 8: while LCHILD(v,i) represents code nested within v ! 9: */ ! 10: #include "def.h" ! 11: #include "2.def.h" ! 12: ! 13: gettree(inarc,dom,head) /* build tree */ ! 14: struct list **inarc; ! 15: VERT *dom, *head; ! 16: { ! 17: VERT v,u,from; ! 18: int i; ! 19: for ( v = 0; v < nodenum; ++v) ! 20: { ! 21: RSIB(v) = UNDEFINED; ! 22: for (i = 0; i < CHILDNUM(v); ++i) ! 23: LCHILD(v,i) = UNDEFINED; ! 24: } ! 25: for (i = accessnum-1; i > 0; --i) ! 26: { ! 27: v = after[i]; ! 28: from = oneelt(inarc[v]); /* the unique elt of inarc[v] or UNDEFINED */ ! 29: if (DEFINED(from)) ! 30: if (NTYPE(from) == IFVX && (head[v] == head[from] || asoc(v,exitsize) != -1) ) ! 31: /* place in clause of IFVX if in smallest loop containing it ! 32: or if size of code for v is <= exitsize */ ! 33: if (ARC(from,THEN) == v) ! 34: { ! 35: LCHILD(from,THEN) = v; ! 36: continue; ! 37: } ! 38: else ! 39: { ! 40: ASSERT(ARC(from,ELSE) == v,gettree); ! 41: LCHILD(from,ELSE) = v; ! 42: continue; ! 43: } ! 44: else if (NTYPE(v) == ITERVX || NTYPE(from) == ITERVX ) ! 45: /* LOOPVX -> ITERVX ->vert always in same loop*/ ! 46: { ! 47: LCHILD(from,0) = v; ! 48: continue; ! 49: } ! 50: else if (NTYPE(from) == SWCHVX) ! 51: { ! 52: ASSERT(0 < ARCNUM(v),gettree); ! 53: if (ARC(from,0) == v) ! 54: LCHILD(from,0) = v; ! 55: else ! 56: { ! 57: int j; ! 58: for (j = 1; j < ARCNUM(from); ++j) ! 59: if (ARC(from,j) == v) ! 60: {insib(ARC(from,j-1),v); ! 61: break; ! 62: } ! 63: } ! 64: continue; ! 65: } ! 66: else if (NTYPE(from) == ICASVX && (head[v] == head[from] || asoc(v,exitsize) != -1)) ! 67: { ! 68: LCHILD(from,0) = v; ! 69: continue; ! 70: } ! 71: else if (NTYPE(from) == DUMVX && ARC(from,0) == v) ! 72: { ! 73: LCHILD(from,0) = v; ! 74: continue; ! 75: } ! 76: if (loomem(v,head[dom[v]],head)) ! 77: /* v is in smallest loop containing dom[v] */ ! 78: insib(dom[v],v); ! 79: else ! 80: { ! 81: /* make v follow LOOPVX heading largest loop ! 82: containing DOM[v] but not v */ ! 83: ASSERT(DEFINED(head[dom[v]]),gettree); ! 84: for (u = head[dom[v]]; head[u] != head[v]; u = head[u]) ! 85: ASSERT(DEFINED(head[u]),gettree); ! 86: ASSERT(NTYPE(u) == ITERVX,gettree); ! 87: insib(FATH(u),v); ! 88: } ! 89: } ! 90: } ! 91: ! 92: ! 93: ! 94: ! 95: insib(w,v) /* make RSIB(w) = v, and make RSIB(rightmost sib of v) = old RSIB(w) */ ! 96: VERT w,v; ! 97: { ! 98: VERT u, temp; ! 99: temp = RSIB(w); ! 100: RSIB(w) = v; ! 101: for (u = v; DEFINED(RSIB(u)); u = RSIB(u)) ! 102: ; ! 103: RSIB(u) = temp; ! 104: } ! 105: ! 106: ! 107: asoc(v,n) /* return # of nodes associated with v if <= n, -1 otherwise */ ! 108: VERT v; ! 109: int n; ! 110: { ! 111: int count,i,temp; ! 112: VERT w; ! 113: count = (NTYPE(v) == STLNVX) ? CODELINES(v) : 1; ! 114: for (i = 0; i < CHILDNUM(v); ++i) ! 115: { ! 116: w = LCHILD(v,i); ! 117: if (!DEFINED(w)) continue; ! 118: temp = asoc(w,n-count); ! 119: if (temp == -1) return(-1); ! 120: count += temp; ! 121: if (count > n) return(-1); ! 122: } ! 123: if (DEFINED(RSIB(v))) ! 124: { ! 125: temp = asoc(RSIB(v),n-count); ! 126: if (temp == -1) return(-1); ! 127: count += temp; ! 128: } ! 129: if (count > n) return(-1); ! 130: else return(count); ! 131: }
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