[Hexagon] Add testcases for stack alignment and variable-sized objects

llvm-svn: 235602

Author: Krzysztof Parzyszek

llvm/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 }

llvm/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 }

llvm/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 }

llvm/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 }