1*9880d681SAndroid Build Coastguard Worker; This test checks to make sure that constant exprs don't fold in some simple 2*9880d681SAndroid Build Coastguard Worker; situations 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; RUN: llvm-as < %s | llvm-dis | FileCheck %s 5*9880d681SAndroid Build Coastguard Worker; RUN: verify-uselistorder %s 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; Even give it a datalayout, to tempt folding as much as possible. 8*9880d681SAndroid Build Coastguard Workertarget datalayout = "p:32:32" 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Worker@A = global i64 0 11*9880d681SAndroid Build Coastguard Worker@B = global i64 0 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Worker; Don't fold this. @A might really be allocated next to @B, in which case the 14*9880d681SAndroid Build Coastguard Worker; icmp should return true. It's not valid to *dereference* in @B from a pointer 15*9880d681SAndroid Build Coastguard Worker; based on @A, but icmp isn't a dereference. 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Worker; CHECK: @C = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* @B) 18*9880d681SAndroid Build Coastguard Worker@C = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* @B) 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Worker; Don't fold this completely away either. In theory this could be simplified 21*9880d681SAndroid Build Coastguard Worker; to only use a gep on one side of the icmp though. 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Worker; CHECK: @D = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* getelementptr inbounds (i64, i64* @B, i64 2)) 24*9880d681SAndroid Build Coastguard Worker@D = global i1 icmp eq (i64* getelementptr inbounds (i64, i64* @A, i64 1), i64* getelementptr inbounds (i64, i64* @B, i64 2)) 25*9880d681SAndroid Build Coastguard Worker 26*9880d681SAndroid Build Coastguard Worker; CHECK: @E = global i64 addrspace(1)* addrspacecast (i64* @A to i64 addrspace(1)*) 27*9880d681SAndroid Build Coastguard Worker@E = global i64 addrspace(1)* addrspacecast(i64* @A to i64 addrspace(1)*) 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Worker; Don't add an inbounds on @weak.gep, since @weak may be null. 30*9880d681SAndroid Build Coastguard Worker; CHECK: @weak.gep = global i32* getelementptr (i32, i32* @weak, i32 1) 31*9880d681SAndroid Build Coastguard Worker@weak.gep = global i32* getelementptr (i32, i32* @weak, i32 1) 32*9880d681SAndroid Build Coastguard Worker@weak = extern_weak global i32 33*9880d681SAndroid Build Coastguard Worker 34*9880d681SAndroid Build Coastguard Worker; An object with weak linkage cannot have it's identity determined at compile time. 35*9880d681SAndroid Build Coastguard Worker; CHECK: @F = global i1 icmp eq (i32* @weakany, i32* @glob) 36*9880d681SAndroid Build Coastguard Worker@F = global i1 icmp eq (i32* @weakany, i32* @glob) 37*9880d681SAndroid Build Coastguard Worker@weakany = weak global i32 0 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Worker; Empty globals might end up anywhere, even on top of another global. 40*9880d681SAndroid Build Coastguard Worker; CHECK: @empty.cmp = global i1 icmp eq ([0 x i8]* @empty.1, [0 x i8]* @empty.2) 41*9880d681SAndroid Build Coastguard Worker@empty.1 = external global [0 x i8], align 1 42*9880d681SAndroid Build Coastguard Worker@empty.2 = external global [0 x i8], align 1 43*9880d681SAndroid Build Coastguard Worker@empty.cmp = global i1 icmp eq ([0 x i8]* @empty.1, [0 x i8]* @empty.2) 44*9880d681SAndroid Build Coastguard Worker 45*9880d681SAndroid Build Coastguard Worker; Don't add an inbounds on @glob.a3, since it's not inbounds. 46*9880d681SAndroid Build Coastguard Worker; CHECK: @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 47*9880d681SAndroid Build Coastguard Worker@glob = global i32 0 48*9880d681SAndroid Build Coastguard Worker@glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 49*9880d681SAndroid Build Coastguard Worker@glob.a2 = alias i32, getelementptr (i32, i32* @glob.a1, i32 1) 50*9880d681SAndroid Build Coastguard Worker@glob.a1 = alias i32, i32* @glob 51