| ; RUN: opt -passes=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(ptr byval(i32) %p) |
| |
| define void @f(ptr byval(i32) %x) { |
| entry: |
| %p = alloca i32 |
| %v = load i32, ptr %x |
| store i32 %v, ptr %p |
| tail call void @g(ptr byval(i32) %p) |
| ret void |
| } |
| ; CHECK-LABEL: define void @f(ptr byval(i32) %x) |
| ; CHECK: store i32 %v, ptr %p |
| ; CHECK: tail call void @g(ptr byval(i32) %p) |
