1; RUN: opt < %s -passes=instcombine -S | FileCheck %s 2; 3; Check that SimplifyLibCalls do not (crash or) emit a library call if user 4; has made a function alias with the same name. 5 6%struct._IO_FILE = type { i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32, i64, i16, i8, [1 x i8], ptr, i64, ptr, ptr, ptr, ptr, i64, i32, [20 x i8] } 7%struct._IO_marker = type { ptr, ptr, i32 } 8 9@stderr = external global ptr, align 8 10@.str = private constant [8 x i8] c"crash!\0A\00", align 1 11 12@fwrite = alias i64 (ptr, i64, i64, ptr), ptr @__fwrite_alias 13 14define i64 @__fwrite_alias(ptr %ptr, i64 %size, i64 %n, ptr %s) { 15; CHECK-LABEL: @__fwrite_alias( 16; CHECK-NEXT: entry: 17; CHECK-NEXT: ret i64 0 18; 19entry: 20 %ptr.addr = alloca ptr, align 8 21 %size.addr = alloca i64, align 8 22 %n.addr = alloca i64, align 8 23 %s.addr = alloca ptr, align 8 24 store ptr %ptr, ptr %ptr.addr, align 8 25 store i64 %size, ptr %size.addr, align 8 26 store i64 %n, ptr %n.addr, align 8 27 store ptr %s, ptr %s.addr, align 8 28 ret i64 0 29} 30 31define void @foo() { 32; CHECK-LABEL: @foo( 33; CHECK-NOT: call i64 @fwrite( 34; CHECK: call {{.*}} @fprintf( 35; 36entry: 37 %retval = alloca i32, align 4 38 store i32 0, ptr %retval, align 4 39 %0 = load ptr, ptr @stderr, align 8 40 %call = call i32 (ptr, ptr, ...) @fprintf(ptr %0, ptr @.str) 41 ret void 42} 43 44declare i32 @fprintf(ptr, ptr, ...) 45