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1; RUN: opt -passes=dse -S < %s | FileCheck %s2 3; Don't eliminate stores to allocas before tail calls to functions that use4; byval. It's correct to mark calls like these as 'tail'. To implement this tail5; call, the backend should copy the bytes from the alloca into the argument area6; before clearing the stack.7 8target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"9target triple = "i386-unknown-linux-gnu"10 11declare void @g(ptr byval(i32) %p)12 13define void @f(ptr byval(i32) %x) {14entry:15 %p = alloca i3216 %v = load i32, ptr %x17 store i32 %v, ptr %p18 tail call void @g(ptr byval(i32) %p)19 ret void20}21; CHECK-LABEL: define void @f(ptr byval(i32) %x)22; CHECK: store i32 %v, ptr %p23; CHECK: tail call void @g(ptr byval(i32) %p)24