From 69c69df308a17fd0ce8ec358023f1c917180a4bb Mon Sep 17 00:00:00 2001
From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Thu, 23 Apr 2015 15:12:49 +0000
Subject: [PATCH] [Hexagon] Add testcases for stack alignment and
 variable-sized objects

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235602 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/Hexagon/stack-align1.ll  | 21 +++++++++++++++++++++
 test/CodeGen/Hexagon/stack-align2.ll  | 27 +++++++++++++++++++++++++++
 test/CodeGen/Hexagon/stack-alloca1.ll | 18 ++++++++++++++++++
 test/CodeGen/Hexagon/stack-alloca2.ll | 23 +++++++++++++++++++++++
 4 files changed, 89 insertions(+)
 create mode 100644 test/CodeGen/Hexagon/stack-align1.ll
 create mode 100644 test/CodeGen/Hexagon/stack-align2.ll
 create mode 100644 test/CodeGen/Hexagon/stack-alloca1.ll
 create mode 100644 test/CodeGen/Hexagon/stack-alloca2.ll

diff --git a/test/CodeGen/Hexagon/stack-align1.ll b/test/CodeGen/Hexagon/stack-align1.ll
new file mode 100644
index 00000000000..4efa70f5985
--- /dev/null
+++ b/test/CodeGen/Hexagon/stack-align1.ll
@@ -0,0 +1,21 @@
+; RUN: llc -O0 -march=hexagon < %s | FileCheck %s
+; CHECK: and(r29, #-32)
+; CHECK-DAG: add(r29, #0)
+; CHECK-DAG: add(r29, #28)
+
+target triple = "hexagon-unknown-unknown"
+
+; Function Attrs: nounwind uwtable
+define void @foo() #0 {
+entry:
+  %x = alloca i32, align 4
+  %y = alloca i32, align 32
+  %0 = bitcast i32* %x to i8*
+  %1 = bitcast i32* %y to i8*
+  call void @bar(i8* %0, i8* %1)
+  ret void
+}
+
+declare void @bar(i8*, i8*) #0
+
+attributes #0 = { nounwind }
diff --git a/test/CodeGen/Hexagon/stack-align2.ll b/test/CodeGen/Hexagon/stack-align2.ll
new file mode 100644
index 00000000000..1bbd5782032
--- /dev/null
+++ b/test/CodeGen/Hexagon/stack-align2.ll
@@ -0,0 +1,27 @@
+; RUN: llc -O0 -march=hexagon < %s | FileCheck %s
+; CHECK: and(r29, #-128)
+; CHECK-DAG: add(r29, #0)
+; CHECK-DAG: add(r29, #64)
+; CHECK-DAG: add(r29, #96)
+; CHECK-DAG: add(r29, #124)
+
+target triple = "hexagon-unknown-unknown"
+
+; Function Attrs: nounwind uwtable
+define void @foo() #0 {
+entry:
+  %x = alloca i32, align 4
+  %y = alloca i32, align 32
+  %z = alloca i32, align 64
+  %w = alloca i32, align 128
+  %0 = bitcast i32* %x to i8*
+  %1 = bitcast i32* %y to i8*
+  %2 = bitcast i32* %z to i8*
+  %3 = bitcast i32* %w to i8*
+  call void @bar(i8* %0, i8* %1, i8* %2, i8* %3)
+  ret void
+}
+
+declare void @bar(i8*, i8*, i8*, i8*) #0
+
+attributes #0 = { nounwind }
diff --git a/test/CodeGen/Hexagon/stack-alloca1.ll b/test/CodeGen/Hexagon/stack-alloca1.ll
new file mode 100644
index 00000000000..00e9e051aeb
--- /dev/null
+++ b/test/CodeGen/Hexagon/stack-alloca1.ll
@@ -0,0 +1,18 @@
+; RUN: llc -O0 -march=hexagon < %s | FileCheck %s
+; CHECK: sub(r29, r[[REG:[0-9]+]])
+; CHECK: r29 = r[[REG]]
+
+target triple = "hexagon-unknown-unknown"
+
+; Function Attrs: nounwind uwtable
+define void @foo(i32 %n) #0 {
+entry:
+  %x = alloca i32, i32 %n
+  %0 = bitcast i32* %x to i8*
+  call void @bar(i8* %0)
+  ret void
+}
+
+declare void @bar(i8*) #0
+
+attributes #0 = { nounwind }
diff --git a/test/CodeGen/Hexagon/stack-alloca2.ll b/test/CodeGen/Hexagon/stack-alloca2.ll
new file mode 100644
index 00000000000..ad5e13166aa
--- /dev/null
+++ b/test/CodeGen/Hexagon/stack-alloca2.ll
@@ -0,0 +1,23 @@
+; RUN: llc -O0 -march=hexagon < %s | FileCheck %s
+; CHECK-DAG: r[[AP:[0-9]+]] = and(r30, #-32)
+; CHECK-DAG: r1 = add(r[[AP]], #-32)
+
+; CHECK-DAG: sub(r29, r[[SP:[0-9]+]])
+; CHECK-DAG: r29 = r[[SP]]
+
+target triple = "hexagon-unknown-unknown"
+
+; Function Attrs: nounwind uwtable
+define void @foo(i32 %n) #0 {
+entry:
+  %x = alloca i32, i32 %n
+  %y = alloca i32, align 32
+  %0 = bitcast i32* %x to i8*
+  %1 = bitcast i32* %y to i8*
+  call void @bar(i8* %0, i8* %1)
+  ret void
+}
+
+declare void @bar(i8*, i8* %y) #0
+
+attributes #0 = { nounwind }