From 8211a6a61d82da340c20fde078148bde63e2d83e Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Wed, 27 Apr 2011 23:58:52 +0000
Subject: [PATCH] fast-isel sret.  We actually don't need to do anything
 special on x86. :) rdar://problem/9303592 .

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130348 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86FastISel.cpp       |  1 -
 test/CodeGen/X86/fast-isel-x86-64.ll | 13 +++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index 82ed9bad43b..9d25f4ecdce 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1618,7 +1618,6 @@ bool X86FastISel::X86SelectCall(const Instruction *I) {
 
     // FIXME: Only handle *easy* calls for now.
     if (CS.paramHasAttr(AttrInd, Attribute::InReg) ||
-        CS.paramHasAttr(AttrInd, Attribute::StructRet) ||
         CS.paramHasAttr(AttrInd, Attribute::Nest) ||
         CS.paramHasAttr(AttrInd, Attribute::ByVal))
       return false;
diff --git a/test/CodeGen/X86/fast-isel-x86-64.ll b/test/CodeGen/X86/fast-isel-x86-64.ll
index e5f1a7c1660..40f90cf4023 100644
--- a/test/CodeGen/X86/fast-isel-x86-64.ll
+++ b/test/CodeGen/X86/fast-isel-x86-64.ll
@@ -238,3 +238,16 @@ define void @test19(double* %p1) {
 ; CHECK: test19:
 ; CHECK: pxor
 }
+
+; Check that we fast-isel sret
+%struct.a = type { i64, i64, i64 }
+define void @test20() nounwind ssp {
+entry:
+  %tmp = alloca %struct.a, align 8
+  call void @test20sret(%struct.a* sret %tmp)
+  ret void
+; CHECK: test20:
+; CHECK: leaq (%rsp), %rdi
+; CHECK: callq _test20sret
+}
+declare void @test20sret(%struct.a* sret)