From: Anton Korobeynikov <anton@korobeynikov.info>
Date: Wed, 9 Jan 2019 12:52:15 +0000 (+0000)
Subject: [MSP430] Fix crash while lowering llvm.stacksave/stackrestore
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9ba9ef7b241458e6118262b71891899004fdb8e4;p=llvm

[MSP430] Fix crash while lowering llvm.stacksave/stackrestore

Perform the usual expansion of stacksave / restore intrinsics.
Patch by Kristina Bessonova!

Differential Revision: https://reviews.llvm.org/D54890


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350710 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/MSP430/MSP430ISelLowering.cpp b/lib/Target/MSP430/MSP430ISelLowering.cpp
index 73c8793aa01..3df1f7b9a78 100644
--- a/lib/Target/MSP430/MSP430ISelLowering.cpp
+++ b/lib/Target/MSP430/MSP430ISelLowering.cpp
@@ -95,6 +95,8 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::SIGN_EXTEND,      MVT::i16,   Custom);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i8, Expand);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i16, Expand);
+  setOperationAction(ISD::STACKSAVE,        MVT::Other, Expand);
+  setOperationAction(ISD::STACKRESTORE,     MVT::Other, Expand);
 
   setOperationAction(ISD::CTTZ,             MVT::i8,    Expand);
   setOperationAction(ISD::CTTZ,             MVT::i16,   Expand);
diff --git a/test/CodeGen/MSP430/stacksave_restore.ll b/test/CodeGen/MSP430/stacksave_restore.ll
new file mode 100644
index 00000000000..47c4553929d
--- /dev/null
+++ b/test/CodeGen/MSP430/stacksave_restore.ll
@@ -0,0 +1,13 @@
+; RUN: llc < %s -march=msp430
+
+target triple = "msp430"
+
+define void @foo() {
+entry:
+  %0 = tail call i8* @llvm.stacksave()
+  tail call void @llvm.stackrestore(i8* %0)
+  ret void
+}
+
+declare i8* @llvm.stacksave()
+declare void @llvm.stackrestore(i8*)