Add base-index-based store merge test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300559 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/merge_store.ll b/test/CodeGen/X86/merge_store.ll
index 31c1f65824260aa5c810e8beaa131fad8aef991d..dcb7bd010e56b7d0b174923c1089596a947d5835 100644 (file)
--- a/test/CodeGen/X86/merge_store.ll
+++ b/test/CodeGen/X86/merge_store.ll
@@ -28,3 +28,34 @@ entry:
   for.end:
   ret void
 }
+
+
+
+;; CHECK-LABEL: indexed-store-merge
+
+;; We should be able to merge the 4 consecutive stores.  
+;; FIXMECHECK: movl    $0, 2(%rsi,%rdi)
+
+;; CHECK: movb $0, 2(%rsi,%rdi)
+;; CHECK: movb $0, 3(%rsi,%rdi)
+;; CHECK: movb $0, 4(%rsi,%rdi)
+;; CHECK: movb $0, 5(%rsi,%rdi)
+;; CHECK: movb $0, (%rsi)
+define void @indexed-store-merge(i64 %p, i8* %v) {
+entry:
+  %p2 = add nsw i64 %p, 2
+  %v2 = getelementptr i8, i8* %v, i64 %p2
+  store i8 0, i8* %v2, align 2
+  %p3 = add nsw i64 %p, 3
+  %v3 = getelementptr i8, i8* %v, i64 %p3
+  store i8 0, i8* %v3, align 1
+  %p4 = add nsw i64 %p, 4
+  %v4 = getelementptr i8, i8* %v, i64 %p4
+  store i8 0, i8* %v4, align 2
+  %p5 = add nsw i64 %p, 5
+  %v5 = getelementptr i8, i8* %v, i64 %p5
+  store i8 0, i8* %v5, align 1
+  %v0 = getelementptr i8, i8* %v, i64 0
+  store i8 0, i8* %v0, align 2
+  ret void
+}