derek.holloway
7502bf64a4
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49 lines
1.2 KiB
LLVM
49 lines
1.2 KiB
LLVM
; RUN: opt < %s -passes=globalopt -S | FileCheck %s
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@G = internal global i32 17 ; <ptr> [#uses=3]
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; CHECK-NOT: @G
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define void @foo() {
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%V = load i32, ptr @G ; <i32> [#uses=1]
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store i32 %V, ptr @G
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ret void
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: ret void
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}
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define i32 @bar() {
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%X = load i32, ptr @G ; <i32> [#uses=1]
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ret i32 %X
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: ret i32 17
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}
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@a = internal global ptr null, align 8
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; CHECK-NOT: @a
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; PR13968
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define void @qux() nounwind {
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%g = getelementptr ptr, ptr @a, i32 1
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%cmp = icmp ne ptr null, @a
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%cmp2 = icmp eq ptr null, @a
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%cmp3 = icmp eq ptr null, %g
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store ptr inttoptr (i64 1 to ptr), ptr @a, align 8
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%l = load ptr, ptr @a, align 8
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ret void
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; CHECK-LABEL: @qux(
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; CHECK-NOT: store
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; CHECK-NOT: load
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}
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@addrspacecast_a = internal global ptr null
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define void @addrspacecast_user() {
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; CHECK-LABEL: @addrspacecast_user
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; CHECK-NOT: store
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; CHECK-NOT: load
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%g = addrspacecast ptr @addrspacecast_a to ptr addrspace(1)
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store ptr inttoptr (i64 1 to ptr), ptr @addrspacecast_a, align 8
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%l = load ptr, ptr @addrspacecast_a, align 8
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ret void
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}
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