1 files changed, 37 insertions, 0 deletions
diff --git a/test/CodeGen/X86/alias-static-alloca.ll b/test/CodeGen/X86/alias-static-alloca.ll
new file mode 100644
index 000000000000..f4ca7e39f4fc
--- /dev/null
+++ b/test/CodeGen/X86/alias-static-alloca.ll
@@ -0,0 +1,37 @@
+; RUN: llc -o - -mtriple=x86_64-linux-gnu %s | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; We should be able to bypass the load values to their corresponding
+; stores here.
+
+; CHECK-LABEL: foo
+; CHECK-DAG: movl	%esi, -8(%rsp)
+; CHECK-DAG: movl	%ecx, -16(%rsp)
+; CHECK-DAG: movl	%edi, -4(%rsp)
+; CHECK-DAG: movl	%edx, -12(%rsp)
+; CHECK: leal
+; CHECK: addl
+; CHECK: addl
+; CHECK: retq
+
+define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d) {
+entry:
+  %a0 = alloca i32
+  %a1 = alloca i32
+  %a2 = alloca i32
+  %a3 = alloca i32
+  store i32 %b, i32* %a1
+  store i32 %d, i32* %a3
+  store i32 %a, i32* %a0
+  store i32 %c, i32* %a2
+  %l0 = load i32, i32* %a0
+  %l1 = load i32, i32* %a1
+  %l2 = load i32, i32* %a2
+  %l3 = load i32, i32* %a3
+  %add0 = add nsw i32 %l0, %l1
+  %add1 = add nsw i32 %add0, %l2
+  %add2 = add nsw i32 %add1, %l3
+  ret i32 %add2
+}