Provide dynamic_stackalloc lowering for MSP430.

This fixes PR4769

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80001 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll b/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
new file mode 100644
index 0000000000..0ec05f75e3
--- /dev/null
+++ b/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | llc
+; PR4769
+target datalayout = "e-p:16:8:8-i8:8:8-i16:8:8-i32:8:8"
+target triple = "msp430-generic-generic"
+
+define i16 @foo() nounwind readnone {
+entry:
+  %result = alloca i16, align 1                   ; <i16*> [#uses=2]
+  volatile store i16 0, i16* %result
+  %tmp = volatile load i16* %result               ; <i16> [#uses=1]
+  ret i16 %tmp
+}
+
+define i16 @main() nounwind {
+entry:
+  br label %while.cond
+
+while.cond:                                       ; preds = %while.cond, %entry
+  %call = call i16 @bar() nounwind                ; <i16> [#uses=1]
+  %tobool = icmp eq i16 %call, 0                  ; <i1> [#uses=1]
+  br i1 %tobool, label %while.end, label %while.cond
+
+while.end:                                        ; preds = %while.cond
+  %result.i = alloca i16, align 1                 ; <i16*> [#uses=2]
+  volatile store i16 0, i16* %result.i
+  %tmp.i = volatile load i16* %result.i           ; <i16> [#uses=0]
+  ret i16 0
+}
+
+declare i16 @bar()