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| ; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s
; Test that we correctly handle function type mismatches in argument counts
; and bitwidths. We handle an argument count mismatch by refusing
; to optimize. For bitwidth mismatches, we allow the optimization in order
; to simplify the implementation. This is legal because the bitwidth mismatch
; gives the call undefined behavior.
target datalayout = "e-p:64:64"
target triple = "x86_64-unknown-linux-gnu"
@vt1 = constant [1 x i8*] [i8* bitcast (i32 (i8*, i32)* @vf1 to i8*)], !type !0
@vt2 = constant [1 x i8*] [i8* bitcast (i32 (i8*, i32)* @vf2 to i8*)], !type !0
define i32 @vf1(i8* %this, i32 %arg) readnone {
ret i32 %arg
}
define i32 @vf2(i8* %this, i32 %arg) readnone {
ret i32 %arg
}
; CHECK: define i32 @bad_arg_type
define i32 @bad_arg_type(i8* %obj) {
%vtableptr = bitcast i8* %obj to [1 x i8*]**
%vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
%vtablei8 = bitcast [1 x i8*]* %vtable to i8*
%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
%fptr = load i8*, i8** %fptrptr
%fptr_casted = bitcast i8* %fptr to i32 (i8*, i64)*
%result = call i32 %fptr_casted(i8* %obj, i64 1)
; CHECK: ret i32 1
ret i32 %result
}
; CHECK: define i32 @bad_arg_count
define i32 @bad_arg_count(i8* %obj) {
%vtableptr = bitcast i8* %obj to [1 x i8*]**
%vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
%vtablei8 = bitcast [1 x i8*]* %vtable to i8*
%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
%fptr = load i8*, i8** %fptrptr
%fptr_casted = bitcast i8* %fptr to i32 (i8*, i64, i64)*
; CHECK: call i32 %
%result = call i32 %fptr_casted(i8* %obj, i64 1, i64 2)
ret i32 %result
}
; CHECK: define i64 @bad_return_type
define i64 @bad_return_type(i8* %obj) {
%vtableptr = bitcast i8* %obj to [1 x i8*]**
%vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
%vtablei8 = bitcast [1 x i8*]* %vtable to i8*
%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
%fptr = load i8*, i8** %fptrptr
%fptr_casted = bitcast i8* %fptr to i64 (i8*, i32)*
%result = call i64 %fptr_casted(i8* %obj, i32 1)
; CHECK: ret i64 1
ret i64 %result
}
declare i1 @llvm.type.test(i8*, metadata)
declare void @llvm.assume(i1)
!0 = !{i32 0, !"typeid"}
|