1b637458f6
WebAssembly requires caller and callee signatures to match exactly. In LLVM, there are a variety of circumstances where signatures may be mismatched in practice, and one can bitcast a function address to another type to call it as that type. This patch adds a pass which replaces bitcasted function addresses with wrappers to replace the bitcasts. This doesn't catch everything, but it does match many common cases. llvm-svn: 291315
57 lines
1.6 KiB
LLVM
57 lines
1.6 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
|
|
|
|
; Test that function pointer casts are replaced with wrappers.
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
|
|
target triple = "wasm32-unknown-unknown"
|
|
|
|
; CHECK-LABEL: test:
|
|
; CHECK-NEXT: call .Lbitcast@FUNCTION{{$}}
|
|
; CHECK-NEXT: call .Lbitcast.1@FUNCTION{{$}}
|
|
; CHECK-NEXT: i32.const $push[[L0:[0-9]*]]=, 0
|
|
; CHECK-NEXT: call .Lbitcast.2@FUNCTION, $pop[[L0]]{{$}}
|
|
; CHECK-NEXT: i32.call $drop=, .Lbitcast.3@FUNCTION{{$}}
|
|
; CHECK-NEXT: call foo2@FUNCTION{{$}}
|
|
; CHECK-NEXT: call foo3@FUNCTION{{$}}
|
|
; CHECK-NEXT: .endfunc
|
|
|
|
; CHECK-LABEL: .Lbitcast:
|
|
; CHECK-NEXT: .local i32
|
|
; CHECK-NEXT: call has_i32_arg@FUNCTION, $0{{$}}
|
|
; CHECK-NEXT: .endfunc
|
|
|
|
; CHECK-LABEL: .Lbitcast.1:
|
|
; CHECK-NEXT: call $drop=, has_i32_ret@FUNCTION{{$}}
|
|
; CHECK-NEXT: .endfunc
|
|
|
|
; CHECK-LABEL: .Lbitcast.2:
|
|
; CHECK-NEXT: .param i32
|
|
; CHECK-NEXT: call foo0@FUNCTION{{$}}
|
|
; CHECK-NEXT: .endfunc
|
|
|
|
; CHECK-LABEL: .Lbitcast.3:
|
|
; CHECK-NEXT: .result i32
|
|
; CHECK-NEXT: .local i32
|
|
; CHECK-NEXT: call foo1@FUNCTION{{$}}
|
|
; CHECK-NEXT: copy_local $push0=, $0
|
|
; CHECK-NEXT: .endfunc
|
|
|
|
declare void @has_i32_arg(i32)
|
|
declare i32 @has_i32_ret()
|
|
|
|
declare void @foo0()
|
|
declare void @foo1()
|
|
declare void @foo2()
|
|
declare void @foo3()
|
|
|
|
define void @test() {
|
|
entry:
|
|
call void bitcast (void (i32)* @has_i32_arg to void ()*)()
|
|
call void bitcast (i32 ()* @has_i32_ret to void ()*)()
|
|
call void bitcast (void ()* @foo0 to void (i32)*)(i32 0)
|
|
%t = call i32 bitcast (void ()* @foo1 to i32 ()*)()
|
|
call void bitcast (void ()* @foo2 to void ()*)()
|
|
call void @foo3()
|
|
ret void
|
|
}
|