blob: ed2fbd434a75d4d7061e228fbfa07cb5c257440a [file] [log] [blame]
; 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) {
%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)