Insert ANY_EXTEND node instead of invalid truncate during DAG Combining (X & 1),

when needed. This fixes PR7001

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102838 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/test/CodeGen/MSP430/2010-05-01-CombinerAnd.ll b/test/CodeGen/MSP430/2010-05-01-CombinerAnd.ll
new file mode 100644
index 0000000000..9910037703
--- /dev/null
+++ b/test/CodeGen/MSP430/2010-05-01-CombinerAnd.ll
@@ -0,0 +1,27 @@
+; RUN: llc < %s
+; PR7001
+
+target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16"
+target triple = "msp430-elf"
+
+define i16 @main() nounwind {
+entry:
+  br label %while.cond
+
+while.cond:                                       ; preds = %while.body, %entry
+  br i1 undef, label %land.rhs, label %land.end
+
+land.rhs:                                         ; preds = %while.cond
+  br label %land.end
+
+land.end:                                         ; preds = %land.rhs, %while.cond
+  %0 = phi i1 [ false, %while.cond ], [ undef, %land.rhs ] ; <i1> [#uses=1]
+  br i1 %0, label %while.body, label %while.end
+
+while.body:                                       ; preds = %land.end
+  %tmp4 = load i16* undef                         ; <i16> [#uses=0]
+  br label %while.cond
+
+while.end:                                        ; preds = %land.end
+  ret i16 undef
+}