1; RUN: opt < %s -passes=lint -disable-output 2>&1 | FileCheck %s 2 3%s = type { i8 } 4 5; Function Attrs: argmemonly nounwind 6declare void @llvm.memcpy.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1) #0 7 8; Function Attrs: argmemonly nounwind 9declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1) #0 10 11declare void @f1(ptr noalias nocapture sret(%s), ptr nocapture) 12 13define void @f2() { 14entry: 15 %c = alloca %s 16 %tmp = alloca %s 17 call void @llvm.memset.p0.i32(ptr %c, i8 0, i32 1, i1 false) 18 call void @f1(ptr sret(%s) %c, ptr %c) 19 ret void 20} 21 22; Lint should complain about us passing %c to both arguments since one of them 23; is noalias. 24; CHECK: Unusual: noalias argument aliases another argument 25; CHECK-NEXT: call void @f1(ptr sret(%s) %c, ptr %c) 26 27declare void @f3(ptr noalias nocapture sret(%s), ptr byval(%s) nocapture readnone) 28 29define void @f4() { 30entry: 31 %c = alloca %s 32 %tmp = alloca %s 33 call void @llvm.memset.p0.i32(ptr %c, i8 0, i32 1, i1 false) 34 call void @f3(ptr sret(%s) %c, ptr byval(%s) %c) 35 ret void 36} 37 38; Lint should not complain about passing %c to both arguments even if one is 39; noalias, since the other one is byval, effectively copying the data to the 40; stack instead of passing the pointer itself. 41; CHECK-NOT: Unusual: noalias argument aliases another argument 42; CHECK-NOT: call void @f3(ptr sret(%s) %c, ptr byval(%s) %c) 43 44attributes #0 = { argmemonly nounwind } 45