f2df4bfe54
https://github.com/llvm/llvm-project/pull/78171 added support for non-consecutive local value numbers. This extends the support for global value numbers (for globals and functions). This means that it is now possible to delete an unnamed global definition/declaration without breaking the IR. This is a lot less common than unnamed local values, but it seems like something we should support for consistency. (Unnamed globals are used a lot in Rust though.)
48 lines
1021 B
LLVM
48 lines
1021 B
LLVM
; RUN: opt -S < %s | FileCheck %s
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@5 = global i8 0
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@"" = global i8 1
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@10 = alias i8, ptr @5
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@15 = ifunc ptr(), ptr @20
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define ptr @20() {
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ret ptr null
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}
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declare void @25()
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declare ptr @""(ptr)
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define void @test(ptr %p) {
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store ptr @5, ptr %p
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store ptr @6, ptr %p
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store ptr @10, ptr %p
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store ptr @15, ptr %p
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store ptr @20, ptr %p
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store ptr @25, ptr %p
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store ptr @26, ptr %p
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ret void
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}
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; CHECK: @0 = global i8 0
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; CHECK: @1 = global i8 1
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; CHECK: @2 = alias i8, ptr @0
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; CHECK: @3 = ifunc ptr (), ptr @4
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; CHECK-LABEL: define ptr @4() {
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; CHECK-NEXT: ret ptr null
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; CHECK: declare void @5()
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; CHECK: declare ptr @6(ptr)
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; CHECK-LABEL: define void @test(ptr %p) {
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; CHECK-NEXT: store ptr @0, ptr %p, align 8
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; CHECK-NEXT: store ptr @1, ptr %p, align 8
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; CHECK-NEXT: store ptr @2, ptr %p, align 8
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; CHECK-NEXT: store ptr @3, ptr %p, align 8
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; CHECK-NEXT: store ptr @4, ptr %p, align 8
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; CHECK-NEXT: store ptr @5, ptr %p, align 8
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; CHECK-NEXT: store ptr @6, ptr %p, align 8
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; CHECK-NEXT: ret void
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