call.ll   [plain text]

; Ignore stderr, we expect warnings there
; RUN: llvm-as < %s 2> /dev/null | opt -instcombine | llvm-dis | \
; RUN:    grep call | notcast
; END.


; Simple case, argument translatable without changing the value
declare void @test1a(i8*)

define void @test1(i32* %A) {
        call void bitcast (void (i8*)* @test1a to void (i32*)*)( i32* %A )
        ret void
}

; More complex case, translate argument because of resolution.  This is safe 
; because we have the body of the function
define void @test2a(i8 %A) {
        ret void
}

define i32 @test2(i32 %A) {
        call void bitcast (void (i8)* @test2a to void (i32)*)( i32 %A )
        ret i32 %A
}


; Resolving this should insert a cast from sbyte to int, following the C 
; promotion rules.
declare void @test3a(i8, ...)

define void @test3(i8 %A, i8 %B) {
        call void bitcast (void (i8, ...)* @test3a to void (i8, i8)*)( i8 %A, i8 %B 
)
        ret void
}


; test conversion of return value...
define i8 @test4a() {
        ret i8 0
}

define i32 @test4() {
        %X = call i32 bitcast (i8 ()* @test4a to i32 ()*)( )            ; <i32> [#uses=1]
        ret i32 %X
}


; test conversion of return value... no value conversion occurs so we can do 
; this with just a prototype...
declare i32 @test5a()

define i32 @test5() {
        %X = call i32 @test5a( )                ; <i32> [#uses=1]
        ret i32 %X
}


; test addition of new arguments...
declare i32 @test6a(i32)

define i32 @test6() {
        %X = call i32 bitcast (i32 (i32)* @test6a to i32 ()*)( )                ; <i32> [#uses=1]
        ret i32 %X
}


; test removal of arguments, only can happen with a function body
define void @test7a() {
        ret void
}

define void @test7() {
        call void bitcast (void ()* @test7a to void (i32)*)( i32 5 )
        ret void
}