1; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility %s | FileCheck %s 2 3; Test that we correctly handle function type mismatches in argument counts 4; and bitwidths. We handle an argument count mismatch by refusing 5; to optimize. For bitwidth mismatches, we allow the optimization in order 6; to simplify the implementation. This is legal because the bitwidth mismatch 7; gives the call undefined behavior. 8 9target datalayout = "e-p:64:64" 10target triple = "x86_64-unknown-linux-gnu" 11 12@vt1 = constant [1 x ptr] [ptr @vf1], !type !0 13@vt2 = constant [1 x ptr] [ptr @vf2], !type !0 14 15define i32 @vf1(ptr %this, i32 %arg) readnone { 16 ret i32 %arg 17} 18 19define i32 @vf2(ptr %this, i32 %arg) readnone { 20 ret i32 %arg 21} 22 23; CHECK: define i32 @bad_arg_type 24define i32 @bad_arg_type(ptr %obj) { 25 %vtable = load ptr, ptr %obj 26 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid") 27 call void @llvm.assume(i1 %p) 28 %fptr = load ptr, ptr %vtable 29 %result = call i32 %fptr(ptr %obj, i64 1) 30 ; CHECK: ret i32 1 31 ret i32 %result 32} 33 34; CHECK: define i32 @bad_arg_count 35define i32 @bad_arg_count(ptr %obj) { 36 %vtable = load ptr, ptr %obj 37 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid") 38 call void @llvm.assume(i1 %p) 39 %fptr = load ptr, ptr %vtable 40 ; CHECK: call i32 % 41 %result = call i32 %fptr(ptr %obj, i64 1, i64 2) 42 ret i32 %result 43} 44 45; CHECK: define i64 @bad_return_type 46define i64 @bad_return_type(ptr %obj) { 47 %vtable = load ptr, ptr %obj 48 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid") 49 call void @llvm.assume(i1 %p) 50 %fptr = load ptr, ptr %vtable 51 %result = call i64 %fptr(ptr %obj, i32 1) 52 ; CHECK: ret i64 1 53 ret i64 %result 54} 55 56declare i1 @llvm.type.test(ptr, metadata) 57declare void @llvm.assume(i1) 58 59!0 = !{i32 0, !"typeid"} 60