| ; Test that ComputeNumSignBitsForTargetNode() (SELECT_CCMASK) will help |
| ; DAGCombiner so that it knows that %sel0 is already sign extended. |
| ; |
| ; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -debug-only=isel < %s 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| |
| %0 = type <{ %1*, i16, [6 x i8] }> |
| %1 = type { i32 (...)** } |
| |
| define signext i16 @fun(%0* %Arg0, i16 signext %Arg1) { |
| entry: |
| br i1 undef, label %lab0, label %lab1 |
| |
| lab0: |
| %icmp0 = icmp eq i32 undef, 0 |
| %sel0 = select i1 %icmp0, i16 %Arg1, i16 1 |
| br label %lab1 |
| |
| lab1: |
| ; CHECK: *** MachineFunction at end of ISel *** |
| ; CHECK-LABEL: bb.2.lab1: |
| ; CHECK-NOT: LHR |
| ; CHECK: BRC |
| %phi0 = phi i16 [ 2, %entry ], [ %sel0, %lab0 ] |
| %sext0 = sext i16 %phi0 to i32 |
| br i1 undef, label %lab2, label %lab3 |
| |
| lab2: |
| %and0 = and i32 %sext0, 8 |
| %icmp1 = icmp eq i32 %and0, 0 |
| %sel1 = select i1 %icmp1, i16 %phi0, i16 4 |
| ret i16 %sel1 |
| |
| lab3: |
| ret i16 8 |
| } |
| |
