Fold some and + shift in x86 addressing mode.

llvm-svn: 44970

1 files changed, 21 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/fold-and-shift.ll b/llvm/test/CodeGen/X86/fold-and-shift.ll
new file mode 100644
index 00000000000..705b7954964
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fold-and-shift.ll
@@ -0,0 +1,21 @@
+; RUN: llvm-as < %s | llc -march=x86 | not grep and
+
+define i32 @t1(i8* %X, i32 %i) {
+entry:
+	%tmp2 = shl i32 %i, 2		; <i32> [#uses=1]
+	%tmp4 = and i32 %tmp2, 1020		; <i32> [#uses=1]
+	%tmp7 = getelementptr i8* %X, i32 %tmp4		; <i8*> [#uses=1]
+	%tmp78 = bitcast i8* %tmp7 to i32*		; <i32*> [#uses=1]
+	%tmp9 = load i32* %tmp78, align 4		; <i32> [#uses=1]
+	ret i32 %tmp9
+}
+
+define i32 @t2(i16* %X, i32 %i) {
+entry:
+	%tmp2 = shl i32 %i, 1		; <i32> [#uses=1]
+	%tmp4 = and i32 %tmp2, 131070		; <i32> [#uses=1]
+	%tmp7 = getelementptr i16* %X, i32 %tmp4		; <i16*> [#uses=1]
+	%tmp78 = bitcast i16* %tmp7 to i32*		; <i32*> [#uses=1]
+	%tmp9 = load i32* %tmp78, align 4		; <i32> [#uses=1]
+	ret i32 %tmp9
+}