return 1;
}
+bool SystemZTargetLowering::
+isGuaranteedNotToBeUndefOrPoisonForTargetNode(SDValue Op,
+ const APInt &DemandedElts, const SelectionDAG &DAG,
+ bool PoisonOnly, unsigned Depth) const {
+ switch (Op->getOpcode()) {
+ case SystemZISD::PCREL_WRAPPER:
+ case SystemZISD::PCREL_OFFSET:
+ return true;
+ }
+ return false;
+}
+
unsigned
SystemZTargetLowering::getStackProbeSize(const MachineFunction &MF) const {
const TargetFrameLowering *TFI = Subtarget.getFrameLowering();
const SelectionDAG &DAG,
unsigned Depth) const override;
+ bool isGuaranteedNotToBeUndefOrPoisonForTargetNode(
+ SDValue Op, const APInt &DemandedElts, const SelectionDAG &DAG,
+ bool PoisonOnly, unsigned Depth) const override;
+
ISD::NodeType getExtendForAtomicOps() const override {
return ISD::ANY_EXTEND;
}
--- /dev/null
+; RUN: llc -mtriple=s390x-linux-gnu -mcpu=zEC12 < %s | FileCheck %s
+;
+; Check that DAGCombiner doesn't cause a crash by eventually producing a
+; PCREL_OFFSET node with a freeze operand.
+
+@a = dso_local global [6 x [6 x [3 x i8]]] zeroinitializer, align 2
+@b = dso_local local_unnamed_addr global i32 0, align 4
+
+define void @fun(i8 noundef zeroext %g) {
+; CHECK-LABEL: fun
+entry:
+ %agg.tmp.ensured.sroa.0 = alloca i8, align 2
+ %conv = zext i8 %g to i64
+ %0 = inttoptr i64 %conv to ptr
+ %.fr = freeze ptr getelementptr inbounds ([6 x [6 x [3 x i8]]], ptr @a, i64 0, i64 1, i64 2, i64 1)
+ %cmp = icmp eq ptr %.fr, %0
+ %1 = load i8, ptr getelementptr inbounds ([6 x [6 x [3 x i8]]], ptr @a, i64 0, i64 5, i64 4, i64 2), align 2
+ %conv2 = zext i8 %1 to i32
+ br i1 %cmp, label %for.cond.us, label %for.cond
+
+for.cond.us: ; preds = %entry, %for.cond.us
+ store i32 %conv2, ptr @b, align 4
+ ret void
+
+for.cond: ; preds = %entry, %for.cond
+ store i32 0, ptr @b, align 4
+ ret void
+}