1; RUN: opt < %s -lint -disable-output 2>&1 | FileCheck %s 2 3%s = type { i8 } 4 5; Function Attrs: argmemonly nounwind 6declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) #0 7 8; Function Attrs: argmemonly nounwind 9declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) #0 10 11declare void @f1(%s* noalias nocapture sret(%s), %s* nocapture readnone) 12 13define void @f2() { 14entry: 15 %c = alloca %s 16 %tmp = alloca %s 17 %0 = bitcast %s* %c to i8* 18 %1 = bitcast %s* %tmp to i8* 19 call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i1 false) 20 call void @f1(%s* sret(%s) %c, %s* %c) 21 ret void 22} 23 24; Lint should complain about us passing %c to both arguments since one of them 25; is noalias. 26; CHECK: Unusual: noalias argument aliases another argument 27; CHECK-NEXT: call void @f1(%s* sret(%s) %c, %s* %c) 28 29declare void @f3(%s* noalias nocapture sret(%s), %s* byval(%s) nocapture readnone) 30 31define void @f4() { 32entry: 33 %c = alloca %s 34 %tmp = alloca %s 35 %0 = bitcast %s* %c to i8* 36 %1 = bitcast %s* %tmp to i8* 37 call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i1 false) 38 call void @f3(%s* sret(%s) %c, %s* byval(%s) %c) 39 ret void 40} 41 42; Lint should not complain about passing %c to both arguments even if one is 43; noalias, since the other one is byval, effectively copying the data to the 44; stack instead of passing the pointer itself. 45; CHECK-NOT: Unusual: noalias argument aliases another argument 46; CHECK-NOT: call void @f3(%s* sret(%s) %c, %s* byval(%s) %c) 47 48attributes #0 = { argmemonly nounwind } 49