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Diffstat (limited to 'compiler_and_linker/unsorted/IroJump.c')
-rw-r--r--compiler_and_linker/unsorted/IroJump.c267
1 files changed, 0 insertions, 267 deletions
diff --git a/compiler_and_linker/unsorted/IroJump.c b/compiler_and_linker/unsorted/IroJump.c
deleted file mode 100644
index e39e3f0..0000000
--- a/compiler_and_linker/unsorted/IroJump.c
+++ /dev/null
@@ -1,267 +0,0 @@
-#include "compiler/IroJump.h"
-#include "compiler/IroDump.h"
-#include "compiler/IroFlowgraph.h"
-#include "compiler/IroLinearForm.h"
-#include "compiler/IroUtil.h"
-#include "compiler/CFunc.h"
-#include "compiler/Exceptions.h"
-
-static Boolean CheckChain(CLabel **labelptr) {
- IRONode *node;
-
- for (node = IRO_FirstNode; node; node = node->nextnode) {
- if (node->first && node->first->type == IROLinearLabel && node->first->u.label.label == *labelptr) {
- IROLinear *linear;
- CLabel *lab;
- for (linear = node->first->next, lab = NULL; linear && (linear->type == IROLinearLabel || linear->type == IROLinearNop); linear = linear->next) {
- if (linear->type == IROLinearLabel)
- lab = linear->u.label.label;
- }
-
- if (linear->type == IROLinearGoto && *labelptr != linear->u.label.label) {
- *labelptr = linear->u.label.label;
- IRO_Dump("Chaining goto at %d\n", linear->index);
- return 1;
- }
-
- if (lab && *labelptr != lab)
- *labelptr = lab;
- return 0;
- }
- }
-
- return 0;
-}
-
-Boolean IRO_DoJumpChaining(void) {
- IRONode *node;
- IROLinear *linear;
- Boolean flag;
- SwitchInfo *info;
- SwitchCase *curcase;
- Boolean result;
-
- result = 0;
- do {
- flag = 0;
- for (node = IRO_FirstNode; node; node = node->nextnode) {
- if (node->first) {
- linear = node->last;
- switch (linear->type) {
- case IROLinearGoto:
- if (CheckChain(&linear->u.label.label))
- flag = 1;
- break;
- case IROLinearIf:
- case IROLinearIfNot:
- if (CheckChain(&linear->u.label.label))
- flag = 1;
- break;
- case IROLinearSwitch:
- info = linear->u.swtch.info;
- for (curcase = info->cases; curcase; curcase = curcase->next) {
- if (CheckChain(&curcase->label))
- flag = 1;
- }
- if (CheckChain(&info->defaultlabel))
- flag = 1;
- break;
- }
- }
- }
- result |= flag;
- IRO_CheckForUserBreak();
- } while (flag);
-
- return result;
-}
-
-void IRO_MakeReachable(IRONode *node) {
- UInt16 i;
- Boolean flag;
-
- node->x36 = 1;
- do {
- flag = 0;
- for (node = IRO_FirstNode; node; node = node->nextnode) {
- if (node->x36 && !node->x37) {
- for (i = 0; i < node->numsucc; i++) {
- if (!IRO_NodeTable[node->succ[i]]->x36) {
- flag = 1;
- IRO_NodeTable[node->succ[i]]->x36 = 1;
- }
- }
- node->x37 = 1;
- }
- }
- } while (flag);
-}
-
-Boolean IRO_RemoveUnreachable(void) {
- IRONode *node2;
- IRONode *node1;
- IROLinear *scan;
- IROLinear *linear;
- Boolean result;
- ExceptionAction **actptr;
- ExceptionAction *act;
-
- result = 0;
- IRO_ComputeSuccPred();
- IRO_MakeReachable(IRO_FirstNode);
- node1 = IRO_FirstNode;
- for (node2 = IRO_FirstNode->nextnode; node2; node2 = node2->nextnode) {
- if (node2->first && !node2->x36) {
- IRO_Dump("Removing unreachable code at: %d\n", node2->index);
- node1->nextnode = node2->nextnode;
- node1->last->next = node2->last->next;
- result = 1;
- for (linear = node2->first; linear && linear->type == IROLinearLabel && linear != node2->last->next; linear = linear->next) {
- for (scan = IRO_FirstLinear; scan; scan = scan->next) {
- if (scan->stmt)
- scan->stmt->marked = 0;
- }
-
- for (scan = IRO_FirstLinear; scan; scan = scan->next) {
- if (scan->stmt && !scan->stmt->marked) {
- scan->stmt->marked = 1;
- for (actptr = &scan->stmt->dobjstack; (act = *actptr); actptr = &act->prev) {
- if (
- (act->type == EAT_CATCHBLOCK && act->data.catch_block.catch_label == linear->u.label.label) ||
- (act->type == EAT_SPECIFICATION && act->data.specification.unexp_label == linear->u.label.label)) {
- *actptr = act->prev;
- }
- }
- }
- }
- }
- if (node2 == IRO_LastNode)
- IRO_LastNode = node1;
- } else {
- node1 = node2;
- }
- }
-
- if (result) {
- IRO_ComputeSuccPred();
- IRO_ComputeDom();
- }
-
- IRO_CheckForUserBreak();
- return result;
-}
-
-Boolean IRO_RemoveRedundantJumps(void) {
- IRONode *node;
- IROLinear *linear;
- IROLinear *scan;
- IROLinear *scan2;
- SwitchInfo *info;
- SwitchCase *curcase;
- Boolean result;
-
- result = 0;
- for (node = IRO_FirstNode; node; node = node->nextnode) {
- if (node->first) {
- linear = node->last;
- switch (linear->type) {
- case IROLinearGoto:
- scan = linear->next;
- while (scan && ((scan->type == IROLinearNop) || (scan->type == IROLinearLabel && scan->u.label.label != linear->u.label.label)))
- scan = scan->next;
- while (1) {
- if (!scan) break;
- if (scan->type != IROLinearLabel) break;
- if (scan->u.label.label == linear->u.label.label) {
- IRO_Dump("Removing goto next at %d\n", linear->index);
- linear->type = IROLinearNop;
- result = 1;
- break;
- }
- scan = scan->next;
- }
- break;
-
- case IROLinearIf:
- case IROLinearIfNot:
- scan = linear->next;
- while (scan && scan->type == IROLinearNop)
- scan = scan->next;
- if (scan && scan->type == IROLinearGoto) {
- scan2 = scan->next;
- while (scan2 && ((scan2->type == IROLinearNop) || (scan2->type == IROLinearLabel && scan2->u.label.label != linear->u.label.label)))
- scan2 = scan2->next;
-
- if (scan2 && scan2->type == IROLinearLabel && scan2->u.label.label == linear->u.label.label) {
- if (linear->type == IROLinearIf)
- linear->type = IROLinearIfNot;
- else
- linear->type = IROLinearIf;
-
- linear->u.label.label = scan->u.label.label;
- scan->type = IROLinearNop;
- IRO_Dump("Removing branch around goto at %d\n", linear->index);
- result = 1;
- }
- }
-
- scan2 = linear->next;
- while (scan2 && ((scan2->type == IROLinearNop) || (scan2->type == IROLinearLabel && scan2->u.label.label != linear->u.label.label)))
- scan2 = scan2->next;
- while (1) {
- if (!scan2) break;
- if (scan2->type != IROLinearLabel) break;
- if (scan2->u.label.label == linear->u.label.label) {
- IRO_Dump("Removing If/IfNot_Goto next at %d\n", linear->index);
- linear->type = IROLinearNop;
- IRO_CheckSideEffect(linear->u.label.x4);
- result = 1;
- break;
- }
- scan2 = scan2->next;
- }
- break;
-
- case IROLinearSwitch:
- info = linear->u.swtch.info;
- curcase = info->cases;
- while (curcase && curcase->label == info->defaultlabel)
- curcase = curcase->next;
- if (!curcase) {
- IRO_Dump("Removing Switch next at %d\n", linear->index);
- IRO_CheckSideEffect(linear->u.swtch.x4);
- linear->type = IROLinearGoto;
- linear->u.label.label = info->defaultlabel;
- result = 1;
- }
- break;
- }
- }
- }
-
- if (result) {
- IRO_ComputeSuccPred();
- IRO_ComputeDom();
- }
-
- IRO_CheckForUserBreak();
- return result;
-}
-
-Boolean IRO_RemoveLabels(void) {
- Boolean result;
- IRONode *node;
-
- result = 0;
- IRO_ComputeSuccPred();
- for (node = IRO_FirstNode; node; node = node->nextnode) {
- if (node->first && node->first->type == IROLinearLabel && !node->x39) {
- node->first->type = IROLinearNop;
- node->first->flags &= ~IROLF_1;
- result = 1;
- }
- }
-
- IRO_CheckForUserBreak();
- return result;
-}
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