| ; RUN: llc -mtriple=arm64-apple-ios -global-isel -o - %s | FileCheck %s |
| |
| define i8* @rt0(i32 %x) nounwind readnone { |
| entry: |
| ; CHECK-LABEL: rt0: |
| ; CHECK: hint #7 |
| ; CHECK-NEXT: mov x0, x30 |
| %0 = tail call i8* @llvm.returnaddress(i32 0) |
| ret i8* %0 |
| } |
| |
| define i8* @rt0_call_clobber(i32 %x) nounwind readnone { |
| entry: |
| ; CHECK-LABEL: rt0_call_clobber: |
| ; CHECK: stp x20, x19, [sp, #-32]! |
| ; CHECK: stp x29, x30, [sp, #16] |
| ; CHECK: mov x19, x30 |
| ; CHECK: bl _foo |
| ; CHECK: mov x30, x19 |
| ; CHECK-NEXT: hint #7 |
| ; CHECK-NEXT: mov x0, x30 |
| ; CHECK-NOT: x0 |
| ; CHECK: ret |
| %ret = call i32 @foo() |
| %0 = tail call i8* @llvm.returnaddress(i32 0) |
| ret i8* %0 |
| } |
| |
| define i8* @rt2() nounwind readnone { |
| entry: |
| ; CHECK-LABEL: rt2: |
| ; CHECK: ldr x[[reg:[0-9]+]], [x29] |
| ; CHECK: ldr x[[reg]], [x[[reg]]] |
| ; CHECK: ldr x30, [x[[reg]], #8] |
| ; CHECK: hint #7 |
| ; CHECK: mov x0, x30 |
| ; CHECK-NOT: x0 |
| ; CHECK: ret |
| %0 = tail call i8* @llvm.returnaddress(i32 2) |
| ret i8* %0 |
| } |
| |
| |
| declare i32 @foo() |
| declare i8* @llvm.returnaddress(i32) nounwind readnone |