Optimize alignment of loads and stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40102 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 66 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/loadstore-alignment.ll b/test/Transforms/InstCombine/loadstore-alignment.ll
new file mode 100644
index 0000000..fd8b0e2
--- /dev/null
+++ b/test/Transforms/InstCombine/loadstore-alignment.ll
@@ -0,0 +1,66 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {, align 16} | wc -l | grep 12
+
+@x = external global <2 x i64>, align 16
+@xx = external global [13 x <2 x i64>], align 16
+
+define <2 x i64> @static_hem() {
+	%t = getelementptr <2 x i64>* @x, i32 7
+	%tmp1 = load <2 x i64>* %t, align 1
+	ret <2 x i64> %tmp1
+}
+
+define <2 x i64> @hem(i32 %i) {
+	%t = getelementptr <2 x i64>* @x, i32 %i
+	%tmp1 = load <2 x i64>* %t, align 1
+	ret <2 x i64> %tmp1
+}
+
+define <2 x i64> @hem_2d(i32 %i, i32 %j) {
+	%t = getelementptr [13 x <2 x i64>]* @xx, i32 %i, i32 %j
+	%tmp1 = load <2 x i64>* %t, align 1
+	ret <2 x i64> %tmp1
+}
+
+define <2 x i64> @foo() {
+	%tmp1 = load <2 x i64>* @x, align 1
+	ret <2 x i64> %tmp1
+}
+
+define <2 x i64> @bar() {
+	%t = alloca <2 x i64>
+        call void @kip(<2 x i64>* %t);
+	%tmp1 = load <2 x i64>* %t, align 1
+	ret <2 x i64> %tmp1
+}
+
+define void @static_hem_store(<2 x i64> %y) {
+	%t = getelementptr <2 x i64>* @x, i32 7
+	store <2 x i64> %y, <2 x i64>* %t, align 1
+        ret void
+}
+
+define void @hem_store(i32 %i, <2 x i64> %y) {
+	%t = getelementptr <2 x i64>* @x, i32 %i
+	store <2 x i64> %y, <2 x i64>* %t, align 1
+        ret void
+}
+
+define void @hem_2d_store(i32 %i, i32 %j, <2 x i64> %y) {
+	%t = getelementptr [13 x <2 x i64>]* @xx, i32 %i, i32 %j
+	store <2 x i64> %y, <2 x i64>* %t, align 1
+        ret void
+}
+
+define void @foo_store(<2 x i64> %y) {
+	store <2 x i64> %y, <2 x i64>* @x, align 1
+        ret void
+}
+
+define void @bar_store(<2 x i64> %y) {
+	%t = alloca <2 x i64>
+        call void @kip(<2 x i64>* %t);
+	store <2 x i64> %y, <2 x i64>* %t, align 1
+        ret void
+}
+
+declare void @kip(<2 x i64>* %t)