| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-apple-macosx | FileCheck %s |
| |
| ; TODO: We can get rid of movq here by using different offset and %rax. |
| define i32 @test(i32* %p, i64 %len, i32 %x) { |
| ; CHECK-LABEL: test: |
| ; CHECK: ## %bb.0: ## %entry |
| ; CHECK-NEXT: movq %rsi, %rax |
| ; CHECK-NEXT: .p2align 4, 0x90 |
| ; CHECK-NEXT: LBB0_1: ## %loop |
| ; CHECK-NEXT: ## =>This Inner Loop Header: Depth=1 |
| ; CHECK-NEXT: subq $1, %rax |
| ; CHECK-NEXT: jb LBB0_4 |
| ; CHECK-NEXT: ## %bb.2: ## %backedge |
| ; CHECK-NEXT: ## in Loop: Header=BB0_1 Depth=1 |
| ; CHECK-NEXT: cmpl %edx, -4(%rdi,%rsi,4) |
| ; CHECK-NEXT: movq %rax, %rsi |
| ; CHECK-NEXT: jne LBB0_1 |
| ; CHECK-NEXT: ## %bb.3: ## %failure |
| ; CHECK-NEXT: ud2 |
| ; CHECK-NEXT: LBB0_4: ## %exit |
| ; CHECK-NEXT: movl $-1, %eax |
| ; CHECK-NEXT: retq |
| entry: |
| br label %loop |
| |
| loop: ; preds = %backedge, %entry |
| %iv = phi i64 [ %iv.next, %backedge ], [ %len, %entry ] |
| %iv.next = add nsw i64 %iv, -1 |
| %cond_1 = icmp eq i64 %iv, 0 |
| br i1 %cond_1, label %exit, label %backedge |
| |
| backedge: ; preds = %loop |
| %addr = getelementptr inbounds i32, i32* %p, i64 %iv.next |
| %loaded = load atomic i32, i32* %addr unordered, align 4 |
| %cond_2 = icmp eq i32 %loaded, %x |
| br i1 %cond_2, label %failure, label %loop |
| |
| exit: ; preds = %loop |
| ret i32 -1 |
| |
| failure: ; preds = %backedge |
| unreachable |
| } |