| ; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| |
| ; CHECK-LABEL: Function: test1 |
| ; CHECK: MayAlias: i32* %X, i32* %tmp |
| ; CHECK: MayAlias: i32* %tmp, i8** %ap |
| ; CHECK: NoAlias: i8** %ap, i8** %aq |
| ; CHECK: MayAlias: i32* %tmp, i8** %aq |
| |
| define i32* @test1(i32* %X, ...) { |
| ; Initialize variable argument processing |
| %ap = alloca i8* |
| %ap2 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap2) |
| |
| ; Read a single pointer argument |
| %tmp = va_arg i8** %ap, i32* |
| |
| ; Demonstrate usage of llvm.va_copy and llvm.va_end |
| %aq = alloca i8* |
| %aq2 = bitcast i8** %aq to i8* |
| call void @llvm.va_copy(i8* %aq2, i8* %ap2) |
| call void @llvm.va_end(i8* %aq2) |
| |
| ; Stop processing of arguments. |
| call void @llvm.va_end(i8* %ap2) |
| ret i32* %tmp |
| } |
| |
| declare void @llvm.va_start(i8*) |
| declare void @llvm.va_copy(i8*, i8*) |
| declare void @llvm.va_end(i8*) |
| |
