unsigned NRCycle = getNextResourceCycle(PI->ProcResourceIdx, PI->Cycles);
if (NRCycle > CurrCycle) {
#ifndef NDEBUG
- MaxObservedStall = std::max(NRCycle - CurrCycle, MaxObservedStall);
+ MaxObservedStall = std::max(PI->Cycles, MaxObservedStall);
#endif
DEBUG(dbgs() << " SU(" << SU->NodeNum << ") "
<< SchedModel->getResourceName(PI->ProcResourceIdx)
PE = SchedModel->getWriteProcResEnd(SC); PI != PE; ++PI) {
unsigned PIdx = PI->ProcResourceIdx;
if (SchedModel->getProcResource(PIdx)->BufferSize == 0) {
- ReservedCycles[PIdx] = isTop() ? NextCycle + PI->Cycles : NextCycle;
-#ifndef NDEBUG
- MaxObservedStall = std::max(PI->Cycles, MaxObservedStall);
-#endif
+ if (isTop()) {
+ ReservedCycles[PIdx] =
+ std::max(getNextResourceCycle(PIdx, 0), NextCycle + PI->Cycles);
+ }
+ else
+ ReservedCycles[PIdx] = NextCycle;
}
}
}
}
}
for (unsigned i = 0; Available.empty(); ++i) {
- assert(i <= (HazardRec->getMaxLookAhead() + MaxObservedStall) &&
- "permanent hazard"); (void)i;
+// FIXME: Re-enable assert once PR20057 is resolved.
+// assert(i <= (HazardRec->getMaxLookAhead() + MaxObservedStall) &&
+// "permanent hazard");
+ (void)i;
bumpCycle(CurrCycle + 1);
releasePending();
}
}
declare void @llvm.trap()
+
+; Regression test for PR20057: "permanent hazard"'
+; Resource contention on LDST.
+; CHECK: ********** MI Scheduling **********
+; CHECK: testLdStConflict
+; CHECK: *** Final schedule for BB#1 ***
+; CHECK: LD4Fourv2d
+; CHECK: STRQui
+; CHECK: ********** INTERVALS **********
+define void @testLdStConflict() {
+entry:
+ br label %loop
+
+loop:
+ %0 = call { <2 x i64>, <2 x i64>, <2 x i64>, <2 x i64> } @llvm.aarch64.neon.ld4.v2i64.p0i8(i8* null)
+ %ptr = bitcast i8* undef to <2 x i64>*
+ store <2 x i64> zeroinitializer, <2 x i64>* %ptr, align 4
+ %ptr1 = bitcast i8* undef to <2 x i64>*
+ store <2 x i64> zeroinitializer, <2 x i64>* %ptr1, align 4
+ %ptr2 = bitcast i8* undef to <2 x i64>*
+ store <2 x i64> zeroinitializer, <2 x i64>* %ptr2, align 4
+ %ptr3 = bitcast i8* undef to <2 x i64>*
+ store <2 x i64> zeroinitializer, <2 x i64>* %ptr3, align 4
+ %ptr4 = bitcast i8* undef to <2 x i64>*
+ store <2 x i64> zeroinitializer, <2 x i64>* %ptr4, align 4
+ br label %loop
+}
+
+declare { <2 x i64>, <2 x i64>, <2 x i64>, <2 x i64> } @llvm.aarch64.neon.ld4.v2i64.p0i8(i8*)