From 6426666f6561785d7d5a6d1904f6df11df655082 Mon Sep 17 00:00:00 2001
From: Hans Wennborg <hans@hanshq.net>
Date: Mon, 28 Apr 2014 17:40:03 +0000
Subject: InstCombine: don't drop 'inalloca' in PromoteCastOfAllocation
 (PR19569)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207426 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/alloca.ll | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'test')

diff --git a/test/Transforms/InstCombine/alloca.ll b/test/Transforms/InstCombine/alloca.ll
index ae1cfa1ed2..6d0c131c51 100644
--- a/test/Transforms/InstCombine/alloca.ll
+++ b/test/Transforms/InstCombine/alloca.ll
@@ -129,3 +129,24 @@ define void @test8() {
   call void (...)* @use(i32* %x)
   ret void
 }
+
+; PR19569
+%struct_type = type { i32, i32 }
+declare void @test9_aux(<{ %struct_type }>* inalloca)
+declare i8* @llvm.stacksave()
+declare void @llvm.stackrestore(i8*)
+
+define void @test9(%struct_type* %a) {
+; CHECK-LABEL: @test9(
+entry:
+  %inalloca.save = call i8* @llvm.stacksave()
+  %argmem = alloca inalloca <{ %struct_type }>
+; CHECK: alloca inalloca i64, align 8
+  %0 = getelementptr inbounds <{ %struct_type }>* %argmem, i32 0, i32 0
+  %1 = bitcast %struct_type* %0 to i8*
+  %2 = bitcast %struct_type* %a to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* %2, i32 8, i32 4, i1 false)
+  call void @test9_aux(<{ %struct_type }>* inalloca %argmem)
+  call void @llvm.stackrestore(i8* %inalloca.save)
+  ret void
+}
-- 
cgit v1.2.3