28 lines
664 B
LLVM
28 lines
664 B
LLVM
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; RUN: opt < %s -passes=globalopt -S | FileCheck %s
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@a = internal global ptr null, align 8
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; CHECK: @a
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; PR13968
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define void @qux_no_null_opt() nounwind #0 {
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; CHECK-LABEL: @qux_no_null_opt(
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; CHECK: getelementptr ptr, ptr @a, i32 1
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; CHECK: store ptr inttoptr (i64 1 to ptr), ptr @a
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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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}
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define ptr @bar() {
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%X = load ptr, ptr @a, align 8
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ret ptr %X
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; CHECK-LABEL: @bar(
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; CHECK: load
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}
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attributes #0 = { null_pointer_is_valid }
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