25 lines · plain
1; RUN: llc -mtriple=thumbv7k-apple-watchos2.0 -arm-atomic-cfg-tidy=0 -o - %s | FileCheck %s2 3@tls_var = thread_local global i32 04 5; r9 and r12 can be live across the asm, but those get clobbered by the TLS6; access (in a different BB to order it).7define i32 @test_regs_preserved(ptr %ptr1, ptr %ptr2, i1 %tst1) {8; CHECK-LABEL: test_regs_preserved:9; CHECK: str {{.*}}, [sp10; CHECK: mov {{.*}}, r1211entry: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 %done14 15get_tls:16 %val = load i32, ptr @tls_var17 br label %done18 19done:20 %res = phi i32 [%val, %get_tls], [0, %entry]21 store i32 42, ptr %ptr122 store i32 42, ptr %ptr223 ret i32 %res24}25