===================================================================
@@ -24435,17 +24435,14 @@ ix86_issue_rate (void)
case PROCESSOR_SLM:
case PROCESSOR_K6:
case PROCESSOR_BTVER2:
+ case PROCESSOR_PENTIUM4:
+ case PROCESSOR_NOCONA:
return 2;
case PROCESSOR_PENTIUMPRO:
- case PROCESSOR_PENTIUM4:
- case PROCESSOR_CORE2:
- case PROCESSOR_COREI7:
- case PROCESSOR_HASWELL:
case PROCESSOR_ATHLON:
case PROCESSOR_K8:
case PROCESSOR_AMDFAM10:
- case PROCESSOR_NOCONA:
case PROCESSOR_GENERIC:
case PROCESSOR_BDVER1:
case PROCESSOR_BDVER2:
@@ -24453,6 +24450,11 @@ ix86_issue_rate (void)
case PROCESSOR_BTVER1:
return 3;
+ case PROCESSOR_CORE2:
+ case PROCESSOR_COREI7:
+ case PROCESSOR_HASWELL:
+ return 4;
+
default:
return 1;
}
@@ -24709,10 +24711,15 @@ ix86_adjust_cost (rtx insn, rtx link, rt
case PROCESSOR_BDVER3:
case PROCESSOR_BTVER1:
case PROCESSOR_BTVER2:
- case PROCESSOR_ATOM:
case PROCESSOR_GENERIC:
memory = get_attr_memory (insn);
+ /* Stack engine allows to execute push&pop instructions in parall. */
+ if (((insn_type == TYPE_PUSH || insn_type == TYPE_POP)
+ && (dep_insn_type == TYPE_PUSH || dep_insn_type == TYPE_POP))
+ && (ix86_tune != PROCESSOR_ATHLON && ix86_tune != PROCESSOR_K8))
+ return 0;
+
/* Show ability of reorder buffer to hide latency of load by executing
in parallel with previous instruction in case
previous instruction is not needed to compute the address. */
@@ -24737,6 +24744,29 @@ ix86_adjust_cost (rtx insn, rtx link, rt
else
cost = 0;
}
+ break;
+
+ case PROCESSOR_CORE2:
+ case PROCESSOR_COREI7:
+ case PROCESSOR_HASWELL:
+ memory = get_attr_memory (insn);
+
+ /* Stack engine allows to execute push&pop instructions in parall. */
+ if ((insn_type == TYPE_PUSH || insn_type == TYPE_POP)
+ && (dep_insn_type == TYPE_PUSH || dep_insn_type == TYPE_POP))
+ return 0;
+
+ /* Show ability of reorder buffer to hide latency of load by executing
+ in parallel with previous instruction in case
+ previous instruction is not needed to compute the address. */
+ if ((memory == MEMORY_LOAD || memory == MEMORY_BOTH)
+ && !ix86_agi_dependent (dep_insn, insn))
+ {
+ if (cost >= 4)
+ cost -= 4;
+ else
+ cost = 0;
+ }
break;
case PROCESSOR_SLM: