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. 8target 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; Two unnamed_addr globals can share an address 46; CHECK: @unnamed.cmp = global i1 icmp eq ([5 x i8]* @unnamed.1, [5 x i8]* @unnamed.2) 47@unnamed.1 = unnamed_addr constant [5 x i8] c"asdf\00" 48@unnamed.2 = unnamed_addr constant [5 x i8] c"asdf\00" 49@unnamed.cmp = global i1 icmp eq ([5 x i8]* @unnamed.1, [5 x i8]* @unnamed.2) 50 51@addrspace3 = internal addrspace(3) global i32 undef 52 53; CHECK: @no.fold.addrspace.icmp.eq.gv.null = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 54; CHECK: @no.fold.addrspace.icmp.eq.null.gv = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 55; CHECK: @no.fold.addrspace.icmp.ne.gv.null = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 56; CHECK: @no.fold.addrspace.icmp.ne.null.gv = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 57@no.fold.addrspace.icmp.eq.gv.null = global i1 icmp eq (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 58@no.fold.addrspace.icmp.eq.null.gv = global i1 icmp eq (i32 addrspace(3)* null, i32 addrspace(3)* @addrspace3) 59@no.fold.addrspace.icmp.ne.gv.null = global i1 icmp ne (i32 addrspace(3)* @addrspace3, i32 addrspace(3)* null) 60@no.fold.addrspace.icmp.ne.null.gv = global i1 icmp ne (i32 addrspace(3)* null, i32 addrspace(3)* @addrspace3) 61 62; Don't add an inbounds on @glob.a3, since it's not inbounds. 63; CHECK: @glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 64@glob = global i32 0 65@glob.a3 = alias i32, getelementptr (i32, i32* @glob.a2, i32 1) 66@glob.a2 = alias i32, getelementptr (i32, i32* @glob.a1, i32 1) 67@glob.a1 = alias i32, i32* @glob 68