1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/X86/libcall-sret.ll b/test/CodeGen/X86/libcall-sret.ll
new file mode 100644
index 0000000..67b99ac
--- /dev/null
+++ b/test/CodeGen/X86/libcall-sret.ll
@@ -0,0 +1,28 @@
+; RUN: llc -mtriple=i686-linux-gnu -o - %s | FileCheck %s
+
+@var = global i128 0
+
+; We were trying to convert the i128 operation into a libcall, but failing to
+; perform sret demotion when we couldn't return the result in registers. Make
+; sure we marshal the return properly:
+
+define void @test_sret_libcall(i128 %l, i128 %r) {
+; CHECK-LABEL: test_sret_libcall:
+
+  ; Stack for call: 4(sret ptr), 16(i128 %l), 16(128 %r). So next logical
+  ; (aligned) place for the actual sret data is %esp + 40.
+; CHECK: leal 40(%esp), [[SRET_ADDR:%[a-z]+]]
+; CHECK: movl [[SRET_ADDR]], (%esp)
+; CHECK: calll __multi3
+; CHECK-DAG: movl 40(%esp), [[RES0:%[a-z]+]]
+; CHECK-DAG: movl 44(%esp), [[RES1:%[a-z]+]]
+; CHECK-DAG: movl 48(%esp), [[RES2:%[a-z]+]]
+; CHECK-DAG: movl 52(%esp), [[RES3:%[a-z]+]]
+; CHECK-DAG: movl [[RES0]], var
+; CHECK-DAG: movl [[RES1]], var+4
+; CHECK-DAG: movl [[RES2]], var+8
+; CHECK-DAG: movl [[RES3]], var+12
+  %prod = mul i128 %l, %r
+  store i128 %prod, i128* @var
+  ret void
+}