[AVR] Add calling convention CodeGen tests

This adds CodeGen tests for the AVR C calling convention.

llvm-svn: 289369

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AVR/calling-conv/c/stack.ll b/llvm/test/CodeGen/AVR/calling-conv/c/stack.ll
new file mode 100644
index 00000000000..00ff7d1acd8
--- /dev/null
+++ b/llvm/test/CodeGen/AVR/calling-conv/c/stack.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -march=avr | FileCheck %s
+
+; CHECK-LABEL: ret_void_args_i64_i64_i32
+define void @ret_void_args_i64_i64_i32(i64 %a, i64 %b, i32 %c) {
+  ; We're goign to clobber PTRREG Y
+  ; CHECK:      push    r28
+  ; CHECK-NEXT: push    r29
+
+  ; Load the stack pointer into Y.
+  ; CHECK-NEXT: in      r28, 61
+  ; CHECK-NEXT: in      r29, 62
+
+  ; Load the top two bytes from the 32-bit int.
+  ; CHECK-NEXT: ldd     r24, Y+7
+  ; CHECK-NEXT: ldd     r25, Y+8
+  ; Store the top two bytes of the 32-bit int to memory.
+  ; CHECK-NEXT: sts     7, r25
+  ; CHECK-NEXT: sts     6, r24
+
+  ; Load the bottom two bytes from the 32-bit int.
+  ; CHECK-NEXT: ldd     r24, Y+5
+  ; CHECK-NEXT: ldd     r25, Y+6
+  ; Store the bottom two bytes of the 32-bit int to memory.
+  ; CHECK-NEXT: sts     5, r25
+  ; CHECK-NEXT: sts     4, r24
+
+  ; Restore PTRREG Y
+  ; CHECK-NEXT: pop     r29
+  ; CHECK-NEXT: pop     r28
+  store volatile i32 %c, i32* inttoptr (i64 4 to i32*)
+  ret void
+}