1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2004-09-20-BadLoadCombine.ll b/test/Transforms/InstCombine/2004-09-20-BadLoadCombine.ll
new file mode 100644
index 0000000..8169d21
--- /dev/null
+++ b/test/Transforms/InstCombine/2004-09-20-BadLoadCombine.ll
@@ -0,0 +1,18 @@
+; RUN: opt < %s -instcombine -mem2reg -S | \
+; RUN:   not grep {i32 1}
+
+; When propagating the load through the select, make sure that the load is
+; inserted where the original load was, not where the select is.  Not doing
+; so could produce incorrect results!
+
+define i32 @test(i1 %C) {
+        %X = alloca i32         ; <i32*> [#uses=3]
+        %X2 = alloca i32                ; <i32*> [#uses=2]
+        store i32 1, i32* %X
+        store i32 2, i32* %X2
+        %Y = select i1 %C, i32* %X, i32* %X2            ; <i32*> [#uses=1]
+        store i32 3, i32* %X
+        %Z = load i32* %Y               ; <i32> [#uses=1]
+        ret i32 %Z
+}
+