| ; Check that a callee-saved register will be saved correctly if |
| ; the predicate-to-GPR spilling code uses it. |
| ; |
| ; RUN: llc -march=hexagon -hexagon-initial-cfg-cleanup=0 < %s | FileCheck %s |
| ; |
| ; We expect to spill p0 into a general-purpose register and keep it there, |
| ; without adding an extra spill of that register. |
| ; |
| ; CHECK: PredSpill: |
| ; CHECK-DAG: r{{[0-9]+}} = p0 |
| ; CHECK-DAG: p0 = r{{[0-9]+}} |
| ; CHECK-NOT: = memw(r29 |
| ; |
| |
| define void @PredSpill() { |
| entry: |
| br i1 undef, label %if.then, label %if.else.14 |
| |
| if.then: ; preds = %entry |
| br i1 undef, label %if.end.57, label %if.else |
| |
| if.else: ; preds = %if.then |
| unreachable |
| |
| if.else.14: ; preds = %entry |
| br i1 undef, label %if.then.17, label %if.end.57 |
| |
| if.then.17: ; preds = %if.else.14 |
| br i1 undef, label %if.end.57, label %if.then.20 |
| |
| if.then.20: ; preds = %if.then.17 |
| %call21 = tail call i32 @myfun() |
| %tobool22 = icmp eq i32 %call21, 0 |
| %0 = tail call i32 @myfun() |
| br i1 %tobool22, label %if.else.42, label %if.then.23 |
| |
| if.then.23: ; preds = %if.then.20 |
| unreachable |
| |
| if.else.42: ; preds = %if.then.20 |
| ret void |
| |
| if.end.57: ; preds = %if.then.17, %if.else.14, %if.then |
| ret void |
| } |
| |
| declare i32 @myfun() |
| |
