new testcase, instcombine should turn these into llvm.bswap intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28802 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/bswap.ll b/test/Transforms/InstCombine/bswap.ll
new file mode 100644 (file)
index 0000000..75cfc1d
--- /dev/null
+++ b/test/Transforms/InstCombine/bswap.ll
@@ -0,0 +1,28 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' | wc -l | grep 2
+
+uint %test1(uint %i) {
+        %tmp1 = shr uint %i, ubyte 24           ; <uint> [#uses=1]
+        %tmp3 = shr uint %i, ubyte 8            ; <uint> [#uses=1]
+        %tmp4 = and uint %tmp3, 65280           ; <uint> [#uses=1]
+        %tmp5 = or uint %tmp1, %tmp4            ; <uint> [#uses=1]
+        %tmp7 = shl uint %i, ubyte 8            ; <uint> [#uses=1]
+        %tmp8 = and uint %tmp7, 16711680                ; <uint> [#uses=1]
+        %tmp9 = or uint %tmp5, %tmp8            ; <uint> [#uses=1]
+        %tmp11 = shl uint %i, ubyte 24          ; <uint> [#uses=1]
+        %tmp12 = or uint %tmp9, %tmp11          ; <uint> [#uses=1]
+        ret uint %tmp12
+}
+
+uint %test2(uint %arg) {
+        %tmp2 = shl uint %arg, ubyte 24         ; <uint> [#uses=1]
+        %tmp4 = shl uint %arg, ubyte 8          ; <uint> [#uses=1]
+        %tmp5 = and uint %tmp4, 16711680                ; <uint> [#uses=1]
+        %tmp6 = or uint %tmp2, %tmp5            ; <uint> [#uses=1]
+        %tmp8 = shr uint %arg, ubyte 8          ; <uint> [#uses=1]
+        %tmp9 = and uint %tmp8, 65280           ; <uint> [#uses=1]
+        %tmp10 = or uint %tmp6, %tmp9           ; <uint> [#uses=1]
+        %tmp12 = shr uint %arg, ubyte 24                ; <uint> [#uses=1]
+        %tmp14 = or uint %tmp10, %tmp12         ; <uint> [#uses=1]
+        ret uint %tmp14
+}
+