From b074a608ceb2514ff5c8967b0f36c168fb54576e Mon Sep 17 00:00:00 2001
From: Hal Finkel <hfinkel@anl.gov>
Date: Tue, 30 Aug 2016 00:59:23 +0000
Subject: [PowerPC] Add support for -mlongcall

The "long call" option forces the use of the indirect calling sequence for all
calls (even those that don't really need it). GCC provides this option; This is
helpful, under certain circumstances, for building very-large binaries, and
some other specialized use cases.

Fixes PR19098.

llvm-svn: 280040
---
 llvm/test/CodeGen/PowerPC/longcall.ll | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 llvm/test/CodeGen/PowerPC/longcall.ll

(limited to 'llvm/test')

diff --git a/llvm/test/CodeGen/PowerPC/longcall.ll b/llvm/test/CodeGen/PowerPC/longcall.ll
new file mode 100644
index 00000000000..9645ca8d31f
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/longcall.ll
@@ -0,0 +1,26 @@
+; RUN: llc < %s | FileCheck %s
+target datalayout = "E-m:e-i64:64-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+; Function Attrs: nounwind
+define void @bar() local_unnamed_addr #0 {
+entry:
+  tail call void @foo() #1
+  ret void
+
+; CHECK-LABEL: @bar
+; CHECK: ld [[FD:[0-9]+]], .LC0@toc@l({{[0-9]+}})
+; CHECK: ld [[ADDR:[0-9]+]], 0([[FD]])
+; CHECK: mtctr [[ADDR]]
+; CHECK: bctrl
+; CHECK-NOT: bl foo
+; CHECK: blr
+}
+
+; CHECK: .tc foo
+
+declare void @foo() local_unnamed_addr
+
+attributes #0 = { nounwind "target-cpu"="ppc64" "target-features"="+longcall" }
+attributes #1 = { nounwind }
+
-- 
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