- More refactoring. This gets rid of all of the getOpcode calls.

- This change also makes it possible to switch between ARM / Thumb on a
  per-function basis.
- Fixed thumb2 routine which expand reg + arbitrary immediate. It was using
  using ARM so_imm logic.
- Use movw and movt to do reg + imm when profitable.
- Other code clean ups and minor optimizations.

llvm-svn: 77300

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Thumb2/large-stack.ll b/llvm/test/CodeGen/Thumb2/large-stack.ll
new file mode 100644
index 00000000000..60604f020ff
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb2/large-stack.ll
@@ -0,0 +1,28 @@
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | FileCheck %s
+
+define void @test1() {
+; CHECK: test1:
+; CHECK: sub.w sp, sp, #256
+    %tmp = alloca [ 64 x i32 ] , align 4
+    ret void
+}
+
+define void @test2() {
+; CHECK: test2:
+; CHECK: sub.w sp, sp, #4160
+; CHECK: sub.w sp, sp, #8
+    %tmp = alloca [ 4168 x i8 ] , align 4
+    ret void
+}
+
+define i32 @test3() {
+; CHECK: test3:
+; CHECK: sub.w sp, sp, #805306368
+; CHECK: sub.w sp, sp, #16
+    %retval = alloca i32, align 4
+    %tmp = alloca i32, align 4
+    %a = alloca [805306369 x i8], align 16
+    store i32 0, i32* %tmp
+    %tmp1 = load i32* %tmp
+    ret i32 %tmp1
+}