| Robert Lougher | 18bfb3a | 2018-10-24 17:03:19 +0000 | [diff] [blame] | 1 | ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -o - %s | FileCheck %s |
| 2 | |
| 3 | ; A lifetime end intrinsic should not prevent a call from being tail call |
| 4 | ; optimized. |
| 5 | |
| 6 | define void @foobar() { |
| 7 | ; CHECK-LABEL: foobar |
| 8 | ; CHECK: pushq %rax |
| 9 | ; CHECK: leaq 4(%rsp), %rdi |
| 10 | ; CHECK: callq foo |
| 11 | ; CHECK: popq %rax |
| 12 | ; CHECK: jmp bar |
| 13 | entry: |
| 14 | %i = alloca i32 |
| 15 | %0 = bitcast i32* %i to i8* |
| 16 | call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) |
| 17 | call void @foo(i32* nonnull %i) |
| 18 | tail call void @bar() |
| 19 | call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) |
| 20 | ret void |
| 21 | } |
| 22 | |
| 23 | declare void @foo(i32* nocapture %p) |
| 24 | declare void @bar() |
| 25 | |
| 26 | declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) |
| 27 | declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) |