1 ; RUN: opt < %s -lint -disable-output 2>&1 | FileCheck %s 2 3 %s = type { i8 } 4 5 ; Function Attrs: argmemonly nounwind 6 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) #0 7 8 ; Function Attrs: argmemonly nounwind 9 declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) #0 10 11 declare void @f1(%s* noalias nocapture sret, %s* nocapture readnone) 12 13 define void @f2() { 14 entry: 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 %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 %c, %s* %c) 28 29 declare void @f3(%s* noalias nocapture sret, %s* byval nocapture readnone) 30 31 define void @f4() { 32 entry: 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 %c, %s* byval %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 %c, %s* %c) 47 48 attributes #0 = { argmemonly nounwind } 49
