1 ; This test checks to make sure that constant exprs don't fold in some simple
4 ; RUN: llvm-as < %s | llvm-dis | FileCheck %s
5 ; RUN: verify-uselistorder %s
7 ; Even give it a datalayout, to tempt folding as much as possible.
8 target datalayout = "p:32:32"
13 ; Don't fold this. @A might really be allocated next to @B, in which case the
14 ; icmp should return true. It's not valid to *dereference* in @B from a pointer
15 ; based on @A, but icmp isn't a dereference.
17 ; CHECK: @C = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* @B)
18 @C = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* @B)
20 ; Don't fold this completely away either. In theory this could be simplified
21 ; to only use a gep on one side of the icmp though.
23 ; CHECK: @D = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* getelementptr inbounds (i64, i64* @B, i64 2))
24 @D = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* getelementptr inbounds (i64, i64* @B, i64 2))
26 ; CHECK: @E = global i64 addrspace(1)* addrspacecast (i64* @A to i64 addrspace(1)*)
27 @E = global i64 addrspace(1)* addrspacecast(i64* @A to i64 addrspace(1)*)
29 ; Don't add an inbounds on @weak.gep, since @weak may be null.
30 ; CHECK: @weak.gep = global i32* getelementptr (i32, i32* @weak, i32 1)
31 @weak.gep = global i32* getelementptr (i32, i32* @weak, i32 1)
32 @weak = extern_weak global i32
34 ; An object with weak linkage cannot have it's identity determined at compile time.
35 ; CHECK: @F = global i1 icmp eq (i32* @weakany, i32* @glob)
36 @F = global i1 icmp eq (i32* @weakany, i32* @glob)
37 @weakany = weak global i32 0
39 ; Empty globals might end up anywhere, even on top of another global.
40 ; CHECK: @empty.cmp = global i1 icmp eq ([0 x i8]* @empty.1, [0 x i8]* @empty.2)
41 @empty.1 = external global [0 x i8], align 1
42 @empty.2 = external global [0 x i8], align 1
43 @empty.cmp = global i1 icmp eq ([0 x i8]* @empty.1, [0 x i8]* @empty.2)
45 @addrspace3 = internal addrspace(3) global i32 undef
47 ; CHECK: @no.fold.addrspace.icmp.eq.gv.null = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
48 ; CHECK: @no.fold.addrspace.icmp.eq.null.gv = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
49 ; CHECK: @no.fold.addrspace.icmp.ne.gv.null = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
50 ; CHECK: @no.fold.addrspace.icmp.ne.null.gv = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
51 @no.fold.addrspace.icmp.eq.gv.null = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
52 @no.fold.addrspace.icmp.eq.null.gv = global i1 icmp eq (i32 addrspace(3)* null, i32 addrspace(3)* @addrspace3)
53 @no.fold.addrspace.icmp.ne.gv.null = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null)
54 @no.fold.addrspace.icmp.ne.null.gv = global i1 icmp ne (i32 addrspace(3)* null, i32 addrspace(3)* @addrspace3)
56 ; Don't add an inbounds on @glob.a3, since it's not inbounds.
57 ; CHECK: @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1)
59 @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1)
60 @glob.a2 = alias i32, getelementptr (i32, i32* @glob.a1, i32 1)
61 @glob.a1 = alias i32, i32* @glob