New testcase for folding bswaps into i16/i32 loads and stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29088 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/PowerPC/bswap-load-store.ll b/test/CodeGen/PowerPC/bswap-load-store.ll
new file mode 100644 (file)
index 0000000..b8668bb
--- /dev/null
+++ b/test/CodeGen/PowerPC/bswap-load-store.ll
@@ -0,0 +1,42 @@
+; RUN: llvm-as < %s | llc -march=ppc32 | grep 'stwbrx\|lwbrx\|sthbrx\|lhbrx' | wc -l | grep 4 &&
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep rlwinm &&
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep rlwimi &&
+; RUN: llvm-as < %s | llc -march=ppc64 | grep 'stwbrx\|lwbrx\|sthbrx\|lhbrx' | wc -l | grep 4 &&
+; RUN: llvm-as < %s | llc -march=ppc64 | not grep rlwinm &&
+; RUN: llvm-as < %s | llc -march=ppc64 | not grep rlwimi
+
+void %STWBRX(uint %i, sbyte* %ptr, int %off) {
+       %tmp1 = getelementptr sbyte* %ptr, int %off
+       %tmp1 = cast sbyte* %tmp1 to uint*
+       %tmp13 = tail call uint %llvm.bswap.i32(uint %i)
+       store uint %tmp13, uint* %tmp1
+       ret void
+}
+
+uint %LWBRX(sbyte* %ptr, int %off) {
+       %tmp1 = getelementptr sbyte* %ptr, int %off
+       %tmp1 = cast sbyte* %tmp1 to uint*              
+       %tmp = load uint* %tmp1         
+       %tmp14 = tail call uint %llvm.bswap.i32( uint %tmp )
+       ret uint %tmp14
+}
+
+void %STHBRX(ushort %s, sbyte* %ptr, int %off) {
+       %tmp1 = getelementptr sbyte* %ptr, int %off
+       %tmp1 = cast sbyte* %tmp1 to ushort*
+       %tmp5 = call ushort %llvm.bswap.i16( ushort %s )
+       store ushort %tmp5, ushort* %tmp1
+       ret void
+}
+
+ushort %LHBRX(sbyte* %ptr, int %off) {
+       %tmp1 = getelementptr sbyte* %ptr, int %off
+       %tmp1 = cast sbyte* %tmp1 to ushort*
+       %tmp = load ushort* %tmp1
+       %tmp6 = call ushort %llvm.bswap.i16(ushort %tmp)
+       ret ushort %tmp6
+}
+
+declare uint %llvm.bswap.i32(uint)
+
+declare ushort %llvm.bswap.i16(ushort)