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https://github.com/c64scene-ar/llvm-6502.git
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bebd59c74b
The current SystemZ back-end only supports the local-exec TLS access model. This patch adds all required CodeGen support for the other TLS models, which means in particular: - Expand initial-exec TLS accesses by loading TLS offsets from the GOT using @indntpoff relocations. - Expand general-dynamic and local-dynamic accesses by generating the appropriate calls to __tls_get_offset. Note that this routine has a non-standard ABI and requires loading the GOT pointer into %r12, so the patch also adds support for the GLOBAL_OFFSET_TABLE ISD node. - Add a new platform-specific optimization pass to remove redundant __tls_get_offset calls in the local-dynamic model (modeled after the corresponding X86 pass). - Add test cases verifying all access models and optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229654 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
686 B
LLVM
23 lines
686 B
LLVM
; Test local-exec TLS accesses.
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;
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; RUN: llc < %s -mcpu=z10 -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-MAIN
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; RUN: llc < %s -mcpu=z10 -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-CP
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@x = thread_local global i32 0
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; The offset must be loaded from the constant pool. It doesn't really
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; matter whether we use LARL/AG or LGRL/AGR for the last part.
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define i32 *@foo() {
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; CHECK-CP: .LCP{{.*}}:
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; CHECK-CP: .quad x@NTPOFF
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;
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; CHECK-MAIN-LABEL: foo:
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; CHECK-MAIN: ear [[HIGH:%r[0-5]]], %a0
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; CHECK-MAIN: sllg %r2, [[HIGH]], 32
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; CHECK-MAIN: ear %r2, %a1
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; CHECK-MAIN: larl %r1, .LCP{{.*}}
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; CHECK-MAIN: ag %r2, 0(%r1)
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; CHECK-MAIN: br %r14
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ret i32 *@x
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}
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