37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
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; RUN: llc -mtriple=aarch64-unknown-linux-gnu -relocation-model=pic -verify-machineinstrs %s -o - | FileCheck %s
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; TLSDESC resolver calling convention does not retain the flags register.
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; Check that a TLS descriptor call cannot be lowered in between a cmp and the use of flags.
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@var = thread_local global i32 zeroinitializer
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@test = global i32 zeroinitializer
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define i32 @test_thread_local() {
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; CHECK-LABEL: test_thread_local:
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; CHECK: // %bb.0:
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; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset w30, -16
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; CHECK-NEXT: adrp x8, :got:test
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; CHECK-NEXT: ldr x8, [x8, :got_lo12:test]
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; CHECK-NEXT: adrp x0, :tlsdesc:var
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; CHECK-NEXT: ldr x1, [x0, :tlsdesc_lo12:var]
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; CHECK-NEXT: add x0, x0, :tlsdesc_lo12:var
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; CHECK-NEXT: .tlsdesccall var
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; CHECK-NEXT: blr x1
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; CHECK-NEXT: mrs x9, TPIDR_EL0
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; CHECK-NEXT: ldr w9, [x9, x0]
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; CHECK-NEXT: cmp x8, #0
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; CHECK-NEXT: cinc w0, w9, eq
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; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
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; CHECK-NEXT: ret
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%testval = load i32, ptr @test
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%test = icmp eq ptr @test, null
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%val = load i32, ptr @var
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%result = zext i1 %test to i32
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%result2 = add i32 %val, %result
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ret i32 %result2
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}
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