if (LN0->getNumValues() > 2)
return SDValue();
+ // If the load that we're shrinking is an extload and we're not just
+ // discarding the extension we can't simply shrink the load. Bail.
+ // TODO: It would be possible to merge the extensions in some cases.
+ if (LN0->getExtensionType() != ISD::NON_EXTLOAD &&
+ LN0->getMemoryVT().getSizeInBits() < ExtVT.getSizeInBits() + ShAmt)
+ return SDValue();
+
EVT PtrType = N0.getOperand(1).getValueType();
if (PtrType == MVT::Untyped || PtrType.isExtended())
%p = phi i1 [ true, %entry ], [ %tobool1, %lor.rhs ]
ret i1 %p
}
+
+@x = global { i8, i8, i8, i8, i8, i8, i8, i8 } { i8 1, i8 0, i8 0, i8 0, i8 1, i8 0, i8 0, i8 1 }, align 4
+
+; PR16551
+define void @test5(i32 %X) nounwind {
+entry:
+ %bf.load = load i56* bitcast ({ i8, i8, i8, i8, i8, i8, i8, i8 }* @x to i56*), align 4
+ %bf.lshr = lshr i56 %bf.load, 32
+ %bf.cast = trunc i56 %bf.lshr to i32
+ %cmp = icmp ne i32 %bf.cast, 1
+ br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+ tail call void @bar() nounwind
+ br label %if.end
+
+if.end:
+ ret void
+
+; CHECK: test5:
+; CHECK-NOT: cmpl $1,{{.*}}x+4
+; CHECK: ret
+}