1 ; This test checks to make sure that constant exprs don't fold in some simple 2 ; situations 3 4 ; RUN: llvm-as < %s | llvm-dis | FileCheck %s 5 ; RUN: verify-uselistorder %s 6 7 ; Even give it a datalayout, to tempt folding as much as possible. 8 target datalayout = "p:32:32" 9 10 @A = global i64 0 11 @B = global i64 0 12 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. 16 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) 19 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. 22 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)) 25 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)*) 28 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 33 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 38 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) 44 45 ; Don't add an inbounds on @glob.a3, since it's not inbounds. 46 ; CHECK: @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 47 @glob = global i32 0 48 @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 49 @glob.a2 = alias i32, getelementptr (i32, i32* @glob.a1, i32 1) 50 @glob.a1 = alias i32, i32* @glob 51
