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