Add SwiftShader dump from Feb 6 2013

src/LLVM/test/Transforms/InstCombine/2008-01-21-MulTrunc.ll

diff --git a/src/LLVM/test/Transforms/InstCombine/2008-01-21-MulTrunc.ll b/src/LLVM/test/Transforms/InstCombine/2008-01-21-MulTrunc.ll
new file mode 100644
index 0000000..87c2b75
--- /dev/null
+++ b/src/LLVM/test/Transforms/InstCombine/2008-01-21-MulTrunc.ll
@@ -0,0 +1,17 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+
+define i16 @test1(i16 %a) {
+        %tmp = zext i16 %a to i32               ; <i32> [#uses=2]
+        %tmp21 = lshr i32 %tmp, 8               ; <i32> [#uses=1]
+; CHECK: %tmp21 = lshr i16 %a, 8
+        %tmp5 = mul i32 %tmp, 5         ; <i32> [#uses=1]
+; CHECK: %tmp5 = mul i16 %a, 5
+        %tmp.upgrd.32 = or i32 %tmp21, %tmp5            ; <i32> [#uses=1]
+; CHECK: %tmp.upgrd.32 = or i16 %tmp21, %tmp5
+        %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16           ; <i16> [#uses=1]
+        ret i16 %tmp.upgrd.3
+; CHECK: ret i16 %tmp.upgrd.32
+}
+