Test case for PR8287: SD scheduling time. Fixed in r118904.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118906 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 31 insertions, 0 deletions

diff --git a/test/CodeGen/Generic/2010-11-11-ReturnBigBuffer.ll b/test/CodeGen/Generic/2010-11-11-ReturnBigBuffer.ll
new file mode 100644
index 0000000000..73e26e7929
--- /dev/null
+++ b/test/CodeGen/Generic/2010-11-11-ReturnBigBuffer.ll
@@ -0,0 +1,31 @@
+; RUN: llc < %s PR8287: SelectionDag scheduling time. 
+; Yes, some front end really produces this code. But that is a
+; separate bug. This is more an example than a real test, because I
+; don't know how give llvm-lit a timeout.
+
+define void @foo([4096 x i8]* %arg1, [4096 x i8]* %arg2) {
+  %buffer = alloca [4096 x i8]
+  %pbuf = alloca [4096 x i8]*
+  store [4096 x i8]* %buffer, [4096 x i8]** %pbuf
+
+  %parg1 = alloca [4096 x i8]*
+  store [4096 x i8]* %arg1, [4096 x i8]** %parg1
+
+  %parg2 = alloca [4096 x i8]*
+  store [4096 x i8]* %arg2, [4096 x i8]** %parg2
+
+  ; The original test case has intermediate blocks.
+  ; Presumably something fills in "buffer".
+
+  %bufferCopy1 = load [4096 x i8]** %pbuf
+  %dataCopy1 = load [4096 x i8]* %bufferCopy1
+  %arg1Copy = load [4096 x i8]** %parg1
+  store [4096 x i8] %dataCopy1, [4096 x i8]* %arg1Copy
+
+  %bufferCopy2 = load [4096 x i8]** %pbuf
+  %dataCopy2 = load [4096 x i8]* %bufferCopy2
+  %arg2Copy = load [4096 x i8]** %parg2
+  store [4096 x i8] %dataCopy2, [4096 x i8]* %arg2Copy
+
+  ret void
+}