1; Test that ComputeNumSignBitsForTargetNode() (SELECT_CCMASK) will help 2; DAGCombiner so that it knows that %sel0 is already sign extended. 3; 4; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -debug-only=isel < %s 2>&1 | FileCheck %s 5; REQUIRES: asserts 6 7%0 = type <{ %1*, i16, [6 x i8] }> 8%1 = type { i32 (...)** } 9 10define signext i16 @fun(%0* %Arg0, i16 signext %Arg1) { 11entry: 12 br i1 undef, label %lab0, label %lab1 13 14lab0: 15 %icmp0 = icmp eq i32 undef, 0 16 %sel0 = select i1 %icmp0, i16 %Arg1, i16 1 17 br label %lab1 18 19lab1: 20; CHECK: *** MachineFunction at end of ISel *** 21; CHECK-LABEL: bb.2.lab1: 22; CHECK-NOT: LHR 23; CHECK: BRC 24 %phi0 = phi i16 [ 2, %entry ], [ %sel0, %lab0 ] 25 %sext0 = sext i16 %phi0 to i32 26 br i1 undef, label %lab2, label %lab3 27 28lab2: 29 %and0 = and i32 %sext0, 8 30 %icmp1 = icmp eq i32 %and0, 0 31 %sel1 = select i1 %icmp1, i16 %phi0, i16 4 32 ret i16 %sel1 33 34lab3: 35 ret i16 8 36} 37 38