+#include <stdlib.h>
#include <string.h>
/* common */
-/*****************************************************************************/
-/* Helper functions */
-/*****************************************************************************/
-
-
-
/*****************************************************************************/
/* Optimize shifts */
/*****************************************************************************/
/*****************************************************************************/
-/* struct OptFunc */
+/* struct OptFunc */
/*****************************************************************************/
typedef struct OptFunc OptFunc;
struct OptFunc {
- unsigned (*Func) (CodeSeg*); /* Optimizer function */
- const char* Name; /* Name of the function/group */
- char Disabled; /* True if function disabled */
+ unsigned (*Func) (CodeSeg*); /* Optimizer function */
+ const char* Name; /* Name of the function/group */
+ unsigned long TotalRuns; /* Total number of runs */
+ unsigned long LastRuns; /* Last number of runs */
+ unsigned long TotalChanges; /* Total number of changes */
+ unsigned long LastChanges; /* Last number of changes */
+ char Disabled; /* True if function disabled */
};
/*****************************************************************************/
-/* Code */
+/* Code */
/*****************************************************************************/
#define OptFuncEntry(func) static OptFuncDesc D##func = { func, #func, 0 }
/* A list of all the function descriptions */
-static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 0 };
-static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 0 };
-static OptFunc DOptPtrLoad1 = { OptPtrLoad1, "OptPtrLoad1", 0 };
-static OptFunc DOptPtrLoad2 = { OptPtrLoad2, "OptPtrLoad2", 0 };
-static OptFunc DOptPtrLoad3 = { OptPtrLoad3, "OptPtrLoad3", 0 };
-static OptFunc DOptPtrLoad4 = { OptPtrLoad4, "OptPtrLoad4", 0 };
-static OptFunc DOptPtrLoad5 = { OptPtrLoad5, "OptPtrLoad5", 0 };
-static OptFunc DOptPtrLoad6 = { OptPtrLoad6, "OptPtrLoad6", 0 };
-static OptFunc DOptNegA1 = { OptNegA1, "OptNegA1", 0 };
-static OptFunc DOptNegA2 = { OptNegA2, "OptNegA2", 0 };
-static OptFunc DOptNegAX1 = { OptNegAX1, "OptNegAX1", 0 };
-static OptFunc DOptNegAX2 = { OptNegAX2, "OptNegAX2", 0 };
-static OptFunc DOptNegAX3 = { OptNegAX3, "OptNegAX3", 0 };
-static OptFunc DOptNegAX4 = { OptNegAX4, "OptNegAX4", 0 };
-static OptFunc DOptSub1 = { OptSub1, "OptSub1", 0 };
-static OptFunc DOptSub2 = { OptSub2, "OptSub2", 0 };
-static OptFunc DOptAdd1 = { OptAdd1, "OptAdd1", 0 };
-static OptFunc DOptAdd2 = { OptAdd2, "OptAdd2", 0 };
-static OptFunc DOptAdd3 = { OptAdd3, "OptAdd3", 0 };
-static OptFunc DOptShift1 = { OptShift1, "OptShift1", 0 };
-static OptFunc DOptJumpCascades = { OptJumpCascades, "OptJumpCascades", 0 };
-static OptFunc DOptDeadJumps = { OptDeadJumps, "OptDeadJumps", 0 };
-static OptFunc DOptRTS = { OptRTS, "OptRTS", 0 };
-static OptFunc DOptDeadCode = { OptDeadCode, "OptDeadCode", 0 };
-static OptFunc DOptJumpTarget = { OptJumpTarget, "OptJumpTarget", 0 };
-static OptFunc DOptCondBranches = { OptCondBranches, "OptCondBranches", 0 };
-static OptFunc DOptRTSJumps = { OptRTSJumps, "OptRTSJumps", 0 };
-static OptFunc DOptBoolTrans = { OptBoolTrans, "OptBoolTrans", 0 };
-static OptFunc DOptCmp1 = { OptCmp1, "OptCmp1", 0 };
-static OptFunc DOptCmp2 = { OptCmp2, "OptCmp2", 0 };
-static OptFunc DOptCmp3 = { OptCmp3, "OptCmp3", 0 };
-static OptFunc DOptCmp4 = { OptCmp4, "OptCmp4", 0 };
-static OptFunc DOptCmp5 = { OptCmp5, "OptCmp5", 0 };
-static OptFunc DOptCmp6 = { OptCmp6, "OptCmp6", 0 };
-static OptFunc DOptCmp7 = { OptCmp7, "OptCmp7", 0 };
-static OptFunc DOptTest1 = { OptTest1, "OptTest1", 0 };
-static OptFunc DOptUnusedLoads = { OptUnusedLoads, "OptUnusedLoads", 0 };
-static OptFunc DOptUnusedStores = { OptUnusedStores, "OptUnusedStores", 0 };
-static OptFunc DOptDupLoads = { OptDupLoads, "OptDupLoads", 0 };
-static OptFunc DOptStoreLoad = { OptStoreLoad, "OptStoreLoad", 0 };
-static OptFunc DOptTransfers = { OptTransfers, "OptTransfers", 0 };
-static OptFunc DOptStackOps = { OptStackOps, "OptStackOps", 0 };
-static OptFunc DOptBranchDist = { OptBranchDist, "OptBranchDist", 0 };
+static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad1 = { OptPtrLoad1, "OptPtrLoad1", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad2 = { OptPtrLoad2, "OptPtrLoad2", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad3 = { OptPtrLoad3, "OptPtrLoad3", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad4 = { OptPtrLoad4, "OptPtrLoad4", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad5 = { OptPtrLoad5, "OptPtrLoad5", 0, 0, 0, 0, 0 };
+static OptFunc DOptPtrLoad6 = { OptPtrLoad6, "OptPtrLoad6", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegA1 = { OptNegA1, "OptNegA1", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegA2 = { OptNegA2, "OptNegA2", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegAX1 = { OptNegAX1, "OptNegAX1", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegAX2 = { OptNegAX2, "OptNegAX2", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegAX3 = { OptNegAX3, "OptNegAX3", 0, 0, 0, 0, 0 };
+static OptFunc DOptNegAX4 = { OptNegAX4, "OptNegAX4", 0, 0, 0, 0, 0 };
+static OptFunc DOptSub1 = { OptSub1, "OptSub1", 0, 0, 0, 0, 0 };
+static OptFunc DOptSub2 = { OptSub2, "OptSub2", 0, 0, 0, 0, 0 };
+static OptFunc DOptAdd1 = { OptAdd1, "OptAdd1", 0, 0, 0, 0, 0 };
+static OptFunc DOptAdd2 = { OptAdd2, "OptAdd2", 0, 0, 0, 0, 0 };
+static OptFunc DOptAdd3 = { OptAdd3, "OptAdd3", 0, 0, 0, 0, 0 };
+static OptFunc DOptShift1 = { OptShift1, "OptShift1", 0, 0, 0, 0, 0 };
+static OptFunc DOptJumpCascades = { OptJumpCascades, "OptJumpCascades", 0, 0, 0, 0, 0 };
+static OptFunc DOptDeadJumps = { OptDeadJumps, "OptDeadJumps", 0, 0, 0, 0, 0 };
+static OptFunc DOptRTS = { OptRTS, "OptRTS", 0, 0, 0, 0, 0 };
+static OptFunc DOptDeadCode = { OptDeadCode, "OptDeadCode", 0, 0, 0, 0, 0 };
+static OptFunc DOptJumpTarget = { OptJumpTarget, "OptJumpTarget", 0, 0, 0, 0, 0 };
+static OptFunc DOptCondBranches = { OptCondBranches, "OptCondBranches", 0, 0, 0, 0, 0 };
+static OptFunc DOptRTSJumps = { OptRTSJumps, "OptRTSJumps", 0, 0, 0, 0, 0 };
+static OptFunc DOptBoolTrans = { OptBoolTrans, "OptBoolTrans", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp1 = { OptCmp1, "OptCmp1", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp2 = { OptCmp2, "OptCmp2", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp3 = { OptCmp3, "OptCmp3", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp4 = { OptCmp4, "OptCmp4", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp5 = { OptCmp5, "OptCmp5", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp6 = { OptCmp6, "OptCmp6", 0, 0, 0, 0, 0 };
+static OptFunc DOptCmp7 = { OptCmp7, "OptCmp7", 0, 0, 0, 0, 0 };
+static OptFunc DOptTest1 = { OptTest1, "OptTest1", 0, 0, 0, 0, 0 };
+static OptFunc DOptUnusedLoads = { OptUnusedLoads, "OptUnusedLoads", 0, 0, 0, 0, 0 };
+static OptFunc DOptUnusedStores = { OptUnusedStores, "OptUnusedStores", 0, 0, 0, 0, 0 };
+static OptFunc DOptDupLoads = { OptDupLoads, "OptDupLoads", 0, 0, 0, 0, 0 };
+static OptFunc DOptStoreLoad = { OptStoreLoad, "OptStoreLoad", 0, 0, 0, 0, 0 };
+static OptFunc DOptTransfers = { OptTransfers, "OptTransfers", 0, 0, 0, 0, 0 };
+static OptFunc DOptStackOps = { OptStackOps, "OptStackOps", 0, 0, 0, 0, 0 };
+static OptFunc DOptBranchDist = { OptBranchDist, "OptBranchDist", 0, 0, 0, 0, 0 };
/* Table containing all the steps in alphabetical order */
static OptFunc* OptFuncs[] = {
-static unsigned RunOptStep (CodeSeg* S, OptFunc* O, unsigned Max)
-/* Run one optimizer function Max times or until there are no more changes */
+static int CmpOptStep (const void* Key, const void* Func)
+/* Compare function for bsearch */
{
- unsigned Changes, C;
+ return strcmp (Key, (*(const OptFunc**)Func)->Name);
+}
- /* Don't run the function if it is disabled */
- if (O->Disabled) {
- return 0;
- }
- /* Run this until there are no more changes */
- Changes = 0;
- do {
- C = O->Func (S);
- Changes += C;
- } while (--Max && C > 0);
- /* Return the number of changes */
- return Changes;
+static OptFunc* FindOptFunc (const char* Name)
+/* Find an optimizer step by name in the table and return a pointer. Return
+ * NULL if no such step is found.
+ */
+{
+ /* Search for the function in the list */
+ OptFunc** O = bsearch (Name, OptFuncs, OPTFUNC_COUNT, sizeof (OptFuncs[0]), CmpOptStep);
+ return O? *O : 0;
}
-static OptFunc* FindOptStep (const char* Name)
+static OptFunc* GetOptFunc (const char* Name)
/* Find an optimizer step by name in the table and return a pointer. Print an
* error and call AbEnd if not found.
*/
{
- unsigned I;
-
- /* Run all optimization steps */
- for (I = 0; I < OPTFUNC_COUNT; ++I) {
- if (strcmp (OptFuncs[I]->Name, Name) == 0) {
- /* Found */
- return OptFuncs[I];
- }
+ /* Search for the function in the list */
+ OptFunc* F = FindOptFunc (Name);
+ if (F == 0) {
+ /* Not found */
+ AbEnd ("Optimization step `%s' not found", Name);
}
-
- /* Not found */
- AbEnd ("Optimization step `%s' not found", Name);
- return 0;
+ return F;
}
OptFuncs[I]->Disabled = 1;
}
} else {
- OptFunc* F = FindOptStep (Name);
- F->Disabled = 1;
+ GetOptFunc(Name)->Disabled = 1;
}
}
OptFuncs[I]->Disabled = 0;
}
} else {
- OptFunc* F = FindOptStep (Name);
- F->Disabled = 0;
+ GetOptFunc(Name)->Disabled = 0;
}
}
+static void ReadOptStats (const char* Name)
+/* Read the optimizer statistics file */
+{
+ char Buf [256];
+ unsigned Lines;
+
+ /* Try to open the file */
+ FILE* F = fopen (Name, "r");
+ if (F == 0) {
+ /* Ignore the error */
+ return;
+ }
+
+ /* Read and parse the lines */
+ Lines = 0;
+ while (fgets (Buf, sizeof (Buf), F) != 0) {
+
+ char* B;
+ unsigned Len;
+ OptFunc* Func;
+
+ /* Fields */
+ char Name[32];
+ unsigned long TotalRuns;
+ unsigned long TotalChanges;
+
+ /* Count lines */
+ ++Lines;
+
+ /* Remove trailing white space including the line terminator */
+ B = Buf;
+ Len = strlen (B);
+ while (Len > 0 && IsSpace (B[Len-1])) {
+ --Len;
+ }
+ B[Len] = '\0';
+
+ /* Remove leading whitespace */
+ while (IsSpace (*B)) {
+ ++B;
+ }
+
+ /* Check for empty and comment lines */
+ if (*B == '\0' || *B == ';' || *B == '#') {
+ continue;
+ }
+
+ /* Parse the line */
+ if (sscanf (B, "%31s %lu %*u %lu %*u", Name, &TotalRuns, &TotalChanges) != 3) {
+ /* Syntax error */
+ continue;
+ }
+
+ /* Search for the optimizer step. */
+ Func = FindOptFunc (Name);
+ if (Func == 0) {
+ /* Not found */
+ continue;
+ }
+
+ /* Found the step, set the fields */
+ Func->TotalRuns = TotalRuns;
+ Func->TotalChanges = TotalChanges;
+
+ }
+
+ /* Close the file, ignore errors here. */
+ fclose (F);
+}
+
+
+
+static void WriteOptStats (const char* Name)
+/* Write the optimizer statistics file */
+{
+ unsigned I;
+
+ /* Try to open the file */
+ FILE* F = fopen (Name, "w");
+ if (F == 0) {
+ /* Ignore the error */
+ return;
+ }
+
+ /* Write the file */
+ for (I = 0; I < OPTFUNC_COUNT; ++I) {
+ const OptFunc* O = OptFuncs[I];
+ fprintf (F,
+ "%s %lu %lu %lu %lu\n",
+ O->Name,
+ O->TotalRuns,
+ O->LastRuns,
+ O->TotalChanges,
+ O->LastChanges);
+ }
+
+ /* Close the file, ignore errors here. */
+ fclose (F);
+}
+
+
+
+static unsigned RunOptFunc (CodeSeg* S, OptFunc* F, unsigned Max)
+/* Run one optimizer function Max times or until there are no more changes */
+{
+ unsigned Changes, C;
+
+ /* Don't run the function if it is disabled */
+ if (F->Disabled) {
+ return 0;
+ }
+
+ /* Run this until there are no more changes */
+ Changes = 0;
+ do {
+
+ /* Run the function */
+ C = F->Func (S);
+ Changes += C;
+
+ /* Do statistics */
+ ++F->TotalRuns;
+ ++F->LastRuns;
+ F->TotalChanges += C;
+ F->LastChanges += C;
+
+ } while (--Max && C > 0);
+
+ /* Return the number of changes */
+ return Changes;
+}
+
+
+
static void RunOptGroup1 (CodeSeg* S)
/* Run the first group of optimization steps. These steps translate known
* patterns emitted by the code generator into more optimal patterns. Order
* the same patterns as later steps as subpatterns.
*/
{
- RunOptStep (S, &DOptPtrStore1, 1);
- RunOptStep (S, &DOptPtrStore2, 1);
- RunOptStep (S, &DOptPtrLoad1, 1);
- RunOptStep (S, &DOptPtrLoad2, 1);
- RunOptStep (S, &DOptPtrLoad3, 1);
- RunOptStep (S, &DOptPtrLoad4, 1);
- RunOptStep (S, &DOptPtrLoad5, 1);
- RunOptStep (S, &DOptNegAX1, 1);
- RunOptStep (S, &DOptNegAX2, 1);
- RunOptStep (S, &DOptNegAX3, 1);
- RunOptStep (S, &DOptNegAX4, 1);
- RunOptStep (S, &DOptAdd1, 1);
- RunOptStep (S, &DOptAdd2, 1);
- RunOptStep (S, &DOptShift1, 1);
+ RunOptFunc (S, &DOptPtrStore1, 1);
+ RunOptFunc (S, &DOptPtrStore2, 1);
+ RunOptFunc (S, &DOptPtrLoad1, 1);
+ RunOptFunc (S, &DOptPtrLoad2, 1);
+ RunOptFunc (S, &DOptPtrLoad3, 1);
+ RunOptFunc (S, &DOptPtrLoad4, 1);
+ RunOptFunc (S, &DOptPtrLoad5, 1);
+ RunOptFunc (S, &DOptNegAX1, 1);
+ RunOptFunc (S, &DOptNegAX2, 1);
+ RunOptFunc (S, &DOptNegAX3, 1);
+ RunOptFunc (S, &DOptNegAX4, 1);
+ RunOptFunc (S, &DOptAdd1, 1);
+ RunOptFunc (S, &DOptAdd2, 1);
+ RunOptFunc (S, &DOptShift1, 1);
}
do {
Changes = 0;
- Changes += RunOptStep (S, &DOptPtrLoad6, 1);
- Changes += RunOptStep (S, &DOptNegA1, 1);
- Changes += RunOptStep (S, &DOptNegA2, 1);
- Changes += RunOptStep (S, &DOptSub1, 1);
- Changes += RunOptStep (S, &DOptSub2, 1);
- Changes += RunOptStep (S, &DOptAdd3, 1);
- Changes += RunOptStep (S, &DOptJumpCascades, 1);
- Changes += RunOptStep (S, &DOptDeadJumps, 1);
- Changes += RunOptStep (S, &DOptRTS, 1);
- Changes += RunOptStep (S, &DOptDeadCode, 1);
- Changes += RunOptStep (S, &DOptJumpTarget, 1);
- Changes += RunOptStep (S, &DOptCondBranches, 1);
- Changes += RunOptStep (S, &DOptRTSJumps, 1);
- Changes += RunOptStep (S, &DOptBoolTrans, 1);
- Changes += RunOptStep (S, &DOptCmp1, 1);
- Changes += RunOptStep (S, &DOptCmp2, 1);
- Changes += RunOptStep (S, &DOptCmp3, 1);
- Changes += RunOptStep (S, &DOptCmp4, 1);
- Changes += RunOptStep (S, &DOptCmp5, 1);
- Changes += RunOptStep (S, &DOptCmp6, 1);
- Changes += RunOptStep (S, &DOptCmp7, 1);
- Changes += RunOptStep (S, &DOptTest1, 1);
- Changes += RunOptStep (S, &DOptUnusedLoads, 1);
- Changes += RunOptStep (S, &DOptUnusedStores, 1);
- Changes += RunOptStep (S, &DOptDupLoads, 1);
- Changes += RunOptStep (S, &DOptStoreLoad, 1);
- Changes += RunOptStep (S, &DOptTransfers, 1);
- Changes += RunOptStep (S, &DOptStackOps, 1);
+ Changes += RunOptFunc (S, &DOptPtrLoad6, 1);
+ Changes += RunOptFunc (S, &DOptNegA1, 1);
+ Changes += RunOptFunc (S, &DOptNegA2, 1);
+ Changes += RunOptFunc (S, &DOptSub1, 1);
+ Changes += RunOptFunc (S, &DOptSub2, 1);
+ Changes += RunOptFunc (S, &DOptAdd3, 1);
+ Changes += RunOptFunc (S, &DOptJumpCascades, 1);
+ Changes += RunOptFunc (S, &DOptDeadJumps, 1);
+ Changes += RunOptFunc (S, &DOptRTS, 1);
+ Changes += RunOptFunc (S, &DOptDeadCode, 1);
+ Changes += RunOptFunc (S, &DOptJumpTarget, 1);
+ Changes += RunOptFunc (S, &DOptCondBranches, 1);
+ Changes += RunOptFunc (S, &DOptRTSJumps, 1);
+ Changes += RunOptFunc (S, &DOptBoolTrans, 1);
+ Changes += RunOptFunc (S, &DOptCmp1, 1);
+ Changes += RunOptFunc (S, &DOptCmp2, 1);
+ Changes += RunOptFunc (S, &DOptCmp3, 1);
+ Changes += RunOptFunc (S, &DOptCmp4, 1);
+ Changes += RunOptFunc (S, &DOptCmp5, 1);
+ Changes += RunOptFunc (S, &DOptCmp6, 1);
+ Changes += RunOptFunc (S, &DOptCmp7, 1);
+ Changes += RunOptFunc (S, &DOptTest1, 1);
+ Changes += RunOptFunc (S, &DOptUnusedLoads, 1);
+ Changes += RunOptFunc (S, &DOptUnusedStores, 1);
+ Changes += RunOptFunc (S, &DOptDupLoads, 1);
+ Changes += RunOptFunc (S, &DOptStoreLoad, 1);
+ Changes += RunOptFunc (S, &DOptTransfers, 1);
+ Changes += RunOptFunc (S, &DOptStackOps, 1);
} while (Changes);
}
/* The last group of optimization steps. Adjust branches.
*/
{
- RunOptStep (S, &DOptBranchDist, 3);
+ RunOptFunc (S, &DOptBranchDist, 3);
}
void RunOpt (CodeSeg* S)
/* Run the optimizer */
{
+ const char* StatFileName;
/* If we shouldn't run the optimizer, bail out */
if (!Optimize) {
return;
}
+ /* Check if we are requested to write optimizer statistics */
+ StatFileName = getenv ("CC65_OPTSTATS");
+ if (StatFileName) {
+ ReadOptStats (StatFileName);
+ }
+
/* Print the name of the function we are working on */
if (S->Func) {
Print (stdout, 1, "Running optimizer for function `%s'\n", S->Func->Name);
RunOptGroup1 (S);
RunOptGroup2 (S);
RunOptGroup3 (S);
+
+ /* Write statistics */
+ if (StatFileName) {
+ WriteOptStats (StatFileName);
+ }
}
projects / cc65 / commitdiff