Provide dynamic_stackalloc lowering for MSP430.
This fixes PR4769
llvm-svn: 80001
diff --git a/llvm/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll b/llvm/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
new file mode 100644
index 0000000..0ec05f7
--- /dev/null
+++ b/llvm/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()