| ; RUN: llc -mtriple=thumbv7k-apple-watchos2.0 -arm-atomic-cfg-tidy=0 -o - %s | FileCheck %s |
| |
| @tls_var = thread_local global i32 0 |
| |
| ; r9 and r12 can be live across the asm, but those get clobbered by the TLS |
| ; access (in a different BB to order it). |
| define i32 @test_regs_preserved(i32* %ptr1, i32* %ptr2, i1 %tst1) { |
| ; CHECK-LABEL: test_regs_preserved: |
| ; CHECK: str {{.*}}, [sp |
| ; CHECK: mov {{.*}}, r12 |
| entry: |
| call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r10},~{r11},~{r13},~{lr}"() |
| br i1 %tst1, label %get_tls, label %done |
| |
| get_tls: |
| %val = load i32, i32* @tls_var |
| br label %done |
| |
| done: |
| %res = phi i32 [%val, %get_tls], [0, %entry] |
| store i32 42, i32* %ptr1 |
| store i32 42, i32* %ptr2 |
| ret i32 %res |
| } |
