1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/multi-use-or.ll b/llvm/test/Transforms/InstCombine/multi-use-or.ll
new file mode 100644
index 00000000000..8b90e0d7f61
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/multi-use-or.ll
@@ -0,0 +1,24 @@
+; RUN: opt < %s -instcombine -S | grep "fadd double .sx, .sy"
+; The 'or' has multiple uses, make sure that this doesn't prevent instcombine
+; from propagating the extends to the truncs.
+
+define double @ScaleObjectAdd(double %sx, double %sy, double %sz) nounwind {
+entry:
+        %sx34 = bitcast double %sx to i64               ; <i64> [#uses=1]
+        %sx3435 = zext i64 %sx34 to i192                ; <i192> [#uses=1]
+        %sy22 = bitcast double %sy to i64               ; <i64> [#uses=1]
+        %sy2223 = zext i64 %sy22 to i192                ; <i192> [#uses=1]
+        %sy222324 = shl i192 %sy2223, 128               ; <i192> [#uses=1]
+        %sy222324.ins = or i192 %sx3435, %sy222324              ; <i192> [#uses=1]
+        
+        
+        %a = trunc i192 %sy222324.ins to i64            ; <i64> [#uses=1]
+        %b = bitcast i64 %a to double           ; <double> [#uses=1]
+        %c = lshr i192 %sy222324.ins, 128               ; <i192> [#uses=1]
+        %d = trunc i192 %c to i64               ; <i64> [#uses=1]
+        %e = bitcast i64 %d to double           ; <double> [#uses=1]
+        %f = fadd double %b, %e
+
+;        ret double %e
+        ret double %f
+}