| ; RUN: llc -mtriple=aarch64-linux-gnu -o - %s | FileCheck %s |
| |
| ; The purpose of this test is to check that an FMOV instruction that |
| ; only materializes an immediate is not MachineLICM'd out of a loop. |
| ; We check this in two ways: by looking for the FMOV inside the loop, |
| ; and also by checking that we're not spilling any FP callee-saved |
| ; registers. |
| |
| %struct.Node = type { %struct.Node*, i8* } |
| |
| define void @process_nodes(%struct.Node* %0) { |
| ; CHECK-LABEL: process_nodes: |
| ; CHECK-NOT: stp {{d[0-9]+}} |
| ; CHECK-LABEL: .LBB0_2: |
| ; CHECK: fmov s0, #1.00000000 |
| ; CHECK: bl do_it |
| entry: |
| %1 = icmp eq %struct.Node* %0, null |
| br i1 %1, label %exit, label %loop |
| |
| loop: |
| %2 = phi %struct.Node* [ %4, %loop ], [ %0, %entry ] |
| tail call void @do_it(float 1.000000e+00, %struct.Node* nonnull %2) |
| %3 = getelementptr inbounds %struct.Node, %struct.Node* %2, i64 0, i32 0 |
| %4 = load %struct.Node*, %struct.Node** %3, align 8 |
| %5 = icmp eq %struct.Node* %4, null |
| br i1 %5, label %exit, label %loop |
| |
| exit: |
| ret void |
| } |
| |
| declare void @do_it(float, %struct.Node*) |
