| Tim Northover | ff168c6 | 2017-04-19 18:07:54 +0000 | [diff] [blame] | 1 | ; RUN: llc -mtriple=thumbv7k-apple-watchos2.0 -arm-atomic-cfg-tidy=0 -o - %s | FileCheck %s |
| 2 | |
| 3 | @tls_var = thread_local global i32 0 |
| 4 | |
| 5 | ; r9 and r12 can be live across the asm, but those get clobbered by the TLS |
| 6 | ; access (in a different BB to order it). |
| 7 | define i32 @test_regs_preserved(i32* %ptr1, i32* %ptr2, i1 %tst1) { |
| 8 | ; CHECK-LABEL: test_regs_preserved: |
| 9 | ; CHECK: str {{.*}}, [sp |
| 10 | ; CHECK: mov {{.*}}, r12 |
| 11 | entry: |
| 12 | call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r10},~{r11},~{r13},~{lr}"() |
| 13 | br i1 %tst1, label %get_tls, label %done |
| 14 | |
| 15 | get_tls: |
| 16 | %val = load i32, i32* @tls_var |
| 17 | br label %done |
| 18 | |
| 19 | done: |
| 20 | %res = phi i32 [%val, %get_tls], [0, %entry] |
| 21 | store i32 42, i32* %ptr1 |
| 22 | store i32 42, i32* %ptr2 |
| 23 | ret i32 %res |
| 24 | } |