| ; 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_LABEL: %entry |
| ; CHECK: subs [[REG0:w[0-9]+]], |
| ; CHECK: csel {{w[0-9]+}}, wzr, [[REG0]] |
| 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: |
| ; CHECK_LABEL: %for.body |
| ; CHECK: cmp |
| ; CHECK-NEXT: b.eq |
| ; CHECK-LABEL: %if.then3 |
| %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: |
| ; CHECK_LABEL: %for.inc |
| ; CHECK: cmp |
| ; CHECK-NEXT: add |
| ; CHECK-NEXT: b.le |
| ; CHECK_LABEL: %for.cond.cleanup |
| %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 |
| } |
