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https://github.com/c64scene-ar/llvm-6502.git
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2d21b25393
This patch changes GlobalAlias to point to an arbitrary ConstantExpr and it is
up to MC (or the system assembler) to decide if that expression is valid or not.
This reduces our ability to diagnose invalid uses and how early we can spot
them, but it also lets us do things like
@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
i32 ptrtoint (i32* @bar to i32)) to i32*)
An important implication of this patch is that the notion of aliased global
doesn't exist any more. The alias has to encode the information needed to
access it in its metadata (linkage, visibility, type, etc).
Another consequence to notice is that getSection has to return a "const char *".
It could return a NullTerminatedStringRef if there was such a thing, but when
that was proposed the decision was to just uses "const char*" for that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210062 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
1.8 KiB
LLVM
78 lines
1.8 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-linux-gnu -asm-verbose=false \
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; RUN: -relocation-model=pic | FileCheck %s
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@thread_var = thread_local global i32 42, align 4
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@thread_alias = thread_local(localdynamic) alias i32* @thread_var
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; CHECK-LABEL: get_thread_var
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define i32* @get_thread_var() {
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; CHECK: leal thread_var@TLSGD
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ret i32* @thread_var
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}
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; CHECK-LABEL: get_thread_alias
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define i32* @get_thread_alias() {
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; CHECK: leal thread_alias@TLSLD
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ret i32* @thread_alias
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}
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@bar = global i32 42
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; CHECK-DAG: .globl foo1
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@foo1 = alias i32* @bar
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; CHECK-DAG: .globl foo2
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@foo2 = alias i32* @bar
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%FunTy = type i32()
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define i32 @foo_f() {
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ret i32 0
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}
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; CHECK-DAG: .weak bar_f
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@bar_f = alias weak %FunTy* @foo_f
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@bar_l = alias linkonce_odr i32* @bar
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; CHECK-DAG: .weak bar_l
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@bar_i = alias internal i32* @bar
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; CHECK-DAG: .globl A
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@A = alias bitcast (i32* @bar to i64*)
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; CHECK-DAG: .globl bar_h
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; CHECK-DAG: .hidden bar_h
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@bar_h = hidden alias i32* @bar
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; CHECK-DAG: .globl bar_p
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; CHECK-DAG: .protected bar_p
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@bar_p = protected alias i32* @bar
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; CHECK-DAG: test2 = bar+4
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@test2 = alias getelementptr(i32 *@bar, i32 1)
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; CHECK-DAG: test3 = 42
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@test3 = alias inttoptr(i32 42 to i32*)
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; CHECK-DAG: test4 = bar
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@test4 = alias inttoptr(i64 ptrtoint (i32* @bar to i64) to i32*)
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; CHECK-DAG: test5 = test2-bar
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@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
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i32 ptrtoint (i32* @bar to i32)) to i32*)
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; CHECK-DAG: .globl test
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define i32 @test() {
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entry:
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%tmp = load i32* @foo1
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%tmp1 = load i32* @foo2
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%tmp0 = load i32* @bar_i
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%tmp2 = call i32 @foo_f()
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%tmp3 = add i32 %tmp, %tmp2
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%tmp4 = call %FunTy* @bar_f()
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%tmp5 = add i32 %tmp3, %tmp4
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%tmp6 = add i32 %tmp1, %tmp5
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%tmp7 = add i32 %tmp6, %tmp0
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ret i32 %tmp7
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}
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