| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o - %s | FileCheck %s |
| ; LSR used to pick a sub-optimal solution due to the target responding |
| ; conservatively to isLegalAddImmediate for negative values. |
| |
| declare void @foo(i32) |
| |
| define void @test(i32 %px) { |
| ; CHECK-LABEL: test: |
| ; CHECK: // %bb.0: // %entry |
| ; CHECK-NEXT: str x30, [sp, #-32]! // 8-byte Folded Spill |
| ; CHECK-NEXT: stp x20, x19, [sp, #16] // 16-byte Folded Spill |
| ; CHECK-NEXT: .cfi_def_cfa_offset 32 |
| ; CHECK-NEXT: .cfi_offset w19, -8 |
| ; CHECK-NEXT: .cfi_offset w20, -16 |
| ; CHECK-NEXT: .cfi_offset w30, -32 |
| ; CHECK-NEXT: subs w8, w0, #1 |
| ; CHECK-NEXT: mov w19, w0 |
| ; CHECK-NEXT: csel w20, wzr, w8, lt |
| ; CHECK-NEXT: b .LBB0_2 |
| ; CHECK-NEXT: .LBB0_1: // %for.inc |
| ; CHECK-NEXT: // in Loop: Header=BB0_2 Depth=1 |
| ; CHECK-NEXT: cmp w20, w19 |
| ; CHECK-NEXT: add w20, w20, #1 |
| ; CHECK-NEXT: b.gt .LBB0_4 |
| ; CHECK-NEXT: .LBB0_2: // %for.body |
| ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 |
| ; CHECK-NEXT: cmp w19, w20 |
| ; CHECK-NEXT: b.eq .LBB0_1 |
| ; CHECK-NEXT: // %bb.3: // %if.then3 |
| ; CHECK-NEXT: // in Loop: Header=BB0_2 Depth=1 |
| ; CHECK-NEXT: mov w0, w20 |
| ; CHECK-NEXT: bl foo |
| ; CHECK-NEXT: b .LBB0_1 |
| ; CHECK-NEXT: .LBB0_4: // %for.cond.cleanup |
| ; CHECK-NEXT: ldp x20, x19, [sp, #16] // 16-byte Folded Reload |
| ; CHECK-NEXT: ldr x30, [sp], #32 // 8-byte Folded Reload |
| ; CHECK-NEXT: ret |
| entry: |
| %sub = add nsw i32 %px, -1 |
| %cmp = icmp slt i32 %px, 1 |
| %.sub = select i1 %cmp, i32 0, i32 %sub |
| br label %for.body |
| |
| for.body: |
| %x.015 = phi i32 [ %inc, %for.inc ], [ %.sub, %entry ] |
| %cmp2 = icmp eq i32 %x.015, %px |
| br i1 %cmp2, label %for.inc, label %if.then3 |
| |
| if.then3: |
| tail call void @foo(i32 %x.015) |
| br label %for.inc |
| |
| for.inc: |
| %inc = add nsw i32 %x.015, 1 |
| %cmp1 = icmp sgt i32 %x.015, %px |
| br i1 %cmp1, label %for.cond.cleanup.loopexit, label %for.body |
| |
| for.cond.cleanup.loopexit: |
| br label %for.cond.cleanup |
| |
| for.cond.cleanup: |
| ret void |
| } |