new testcase, bswaps should be eliminated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32005 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/bswap-fold.ll b/test/Transforms/InstCombine/bswap-fold.ll
new file mode 100644 (file)
index 0000000..eb7539c
--- /dev/null
+++ b/test/Transforms/InstCombine/bswap-fold.ll
@@ -0,0 +1,26 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep ret | wc -l | grep 3 &&
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'call.*bswap'
+
+bool %test1(ushort %tmp2) {
+       %tmp10 = call ushort %llvm.bswap.i16( ushort %tmp2 )            
+       %tmp = seteq ushort %tmp10, 1           
+       ret bool %tmp
+}
+
+bool %test2(uint %tmp) {
+       %tmp34 = tail call uint %llvm.bswap.i32( uint %tmp )            
+       %tmp = seteq uint %tmp34, 1             
+       ret bool %tmp
+}
+
+declare uint %llvm.bswap.i32(uint)
+
+bool %test3(ulong %tmp) {
+       %tmp34 = tail call ulong %llvm.bswap.i64( ulong %tmp )          
+       %tmp = seteq ulong %tmp34, 1            
+       ret bool %tmp
+}
+
+declare ulong %llvm.bswap.i64(ulong)
+
+declare ushort %llvm.bswap.i16(ushort)