forked from OSchip/llvm-project
24 lines
725 B
LLVM
24 lines
725 B
LLVM
|
; RUN: opt -dse -S < %s | FileCheck %s
|
||
|
|
||
|
; Don't eliminate stores to allocas before tail calls to functions that use
|
||
|
; byval. It's correct to mark calls like these as 'tail'. To implement this tail
|
||
|
; call, the backend should copy the bytes from the alloca into the argument area
|
||
|
; before clearing the stack.
|
||
|
|
||
|
target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
|
||
|
target triple = "i386-unknown-linux-gnu"
|
||
|
|
||
|
declare void @g(i32* byval %p)
|
||
|
|
||
|
define void @f(i32* byval %x) {
|
||
|
entry:
|
||
|
%p = alloca i32
|
||
|
%v = load i32, i32* %x
|
||
|
store i32 %v, i32* %p
|
||
|
tail call void @g(i32* byval %p)
|
||
|
ret void
|
||
|
}
|
||
|
; CHECK-LABEL: define void @f(i32* byval %x)
|
||
|
; CHECK: store i32 %v, i32* %p
|
||
|
; CHECK: tail call void @g(i32* byval %p)
|