x86 users can now return arbitrary sized structs. Structs too large to fit in return registers will be returned through a hidden sret parameter introduced during SelectionDAG construction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86876 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/bigstructret.ll b/test/CodeGen/X86/bigstructret.ll
new file mode 100644
index 0000000..633995d
--- /dev/null
+++ b/test/CodeGen/X86/bigstructret.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s -march=x86 -o %t
+; RUN: grep "movl .24601, 12(%ecx)" %t
+; RUN: grep "movl .48, 8(%ecx)" %t
+; RUN: grep "movl .24, 4(%ecx)" %t
+; RUN: grep "movl .12, (%ecx)" %t
+
+%0 = type { i32, i32, i32, i32 }
+
+define internal fastcc %0 @ReturnBigStruct() nounwind readnone {
+entry:
+ %0 = insertvalue %0 zeroinitializer, i32 12, 0
+ %1 = insertvalue %0 %0, i32 24, 1
+ %2 = insertvalue %0 %1, i32 48, 2
+ %3 = insertvalue %0 %2, i32 24601, 3
+ ret %0 %3
+}
+