e6ae4e689c
This pseudo-instruction emits a local `bl` writing LR, so that must be saved and restored for the function to return to the right place. If not, we'll return to the inline `.long` that the `bl` stepped over. This fixes the `SIGILL` seen in rayon-rs/rayon#1268.
32 lines
839 B
LLVM
32 lines
839 B
LLVM
; RUN: llc -verify-machineinstrs -relocation-model=pic < %s | FileCheck %s
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target triple = "powerpc-unknown-linux-gnu"
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; Test that LR is preserved when PPC32PICGOT clobbers it with a local "bl".
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@TLS = external thread_local global i8
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; CHECK-LABEL: tls_addr:
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; CHECK: mflr [[SAVED_REG:[0-9]+]]
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; CHECK: bl [[JUMP:\.L[[:alnum:]_]+]]
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; CHECK-NEXT: [[OFFSET:\.L[[:alnum:]_]+]]:
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; CHECK-NEXT: .long _GLOBAL_OFFSET_TABLE_-[[OFFSET]]
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; CHECK-NEXT: [[JUMP]]
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; CHECK-NEXT: mflr {{[0-9]+}}
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; CHECK: mtlr [[SAVED_REG]]
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; CHECK-NEXT: blr
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define ptr @tls_addr() unnamed_addr {
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%1 = call ptr @llvm.threadlocal.address.p0(ptr @TLS)
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ret ptr %1
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}
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declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull)
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!llvm.module.flags = !{!0, !1}
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!0 = !{i32 8, !"PIC Level", i32 2}
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!1 = !{i32 7, !"PIE Level", i32 2}
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