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d215bba299
They are as much trouble as aliases to declarations. They are requiring the code generator to define a symbol with the same value as another symbol, but the second symbol is undefined. If representing this is important for some optimization, we could add support for available_externally aliases. They would be *required* to point to a declaration (or available_externally definition). llvm-svn: 254170
34 lines
818 B
LLVM
34 lines
818 B
LLVM
; RUN: not llvm-as %s -o /dev/null 2>&1 | FileCheck %s
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declare void @f()
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@fa = alias void (), void ()* @f
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; CHECK: Alias must point to a definition
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; CHECK-NEXT: @fa
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@g = external global i32
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@ga = alias i32, i32* @g
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; CHECK: Alias must point to a definition
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; CHECK-NEXT: @ga
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define available_externally void @f2() {
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ret void
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}
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@fa2 = alias void(), void()* @f2
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; CHECK: Alias must point to a definition
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; CHECK-NEXT: @fa2
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@test2_a = alias i32, i32* @test2_b
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@test2_b = alias i32, i32* @test2_a
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; CHECK: Aliases cannot form a cycle
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; CHECK-NEXT: i32* @test2_a
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; CHECK-NEXT: Aliases cannot form a cycle
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; CHECK-NEXT: i32* @test2_b
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@test3_a = global i32 42
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@test3_b = weak alias i32, i32* @test3_a
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@test3_c = alias i32, i32* @test3_b
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; CHECK: Alias cannot point to a weak alias
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; CHECK-NEXT: i32* @test3_c
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