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5b55a47e94
This is useful for functions that are not actually available externally but referenced by a vtable of some kind. Clang emits functions like this for the MS ABI. PR20182. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212337 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.0 KiB
LLVM
44 lines
1.0 KiB
LLVM
; RUN: opt < %s -globaldce -S | FileCheck %s
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; test_function should not be emitted to the .s file.
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; CHECK-NOT: @test_function
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define available_externally i32 @test_function() {
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ret i32 4
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}
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; test_global should not be emitted to the .s file.
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; CHECK-NOT: @test_global
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@test_global = available_externally global i32 4
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; CHECK: @x = external constant void ()*
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@x = available_externally constant void()* @f
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; CHECK: @y = external constant i32
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@y = available_externally constant i32 ptrtoint (void()* @g to i32)
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; @h is still alive, so don't remove the initializer too eagerly.
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; CHECK: @z = available_externally constant i8 ptrtoint (void (i8)* @h to i8)
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@z = available_externally constant i8 ptrtoint (void(i8)* @h to i8)
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; CHECK-NOT: @f
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define linkonce_odr void @f() {
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ret void
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}
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; CHECK-NOT: @g
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define linkonce_odr void @g() {
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ret void
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}
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; CHECK: define linkonce_odr void @h
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define linkonce_odr void @h(i8) {
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ret void
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}
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define i32 @main() {
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%f = load void()** @x
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call void %f()
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%g = load i32* @y
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%h = load i8* @z
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call void @h(i8 %h)
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ret i32 %g
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}
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