[AVR] Add calling convention CodeGen tests

This adds CodeGen tests for the AVR C calling convention.

llvm-svn: 289369

1 files changed, 99 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AVR/calling-conv/c/basic.ll b/llvm/test/CodeGen/AVR/calling-conv/c/basic.ll
new file mode 100644
index 00000000000..a5d4676b9b3
--- /dev/null
+++ b/llvm/test/CodeGen/AVR/calling-conv/c/basic.ll
@@ -0,0 +1,99 @@
+; RUN: llc < %s -march=avr | FileCheck %s
+
+; CHECK-LABEL: ret_void_args_i8
+define void @ret_void_args_i8(i8 %a) {
+  ; CHECK: sts 4, r24
+  store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+  ret void
+}
+
+; CHECK-LABEL: ret_void_args_i8_i32
+define void @ret_void_args_i8_i32(i8 %a, i32 %b) {
+  ; CHECK:      sts     4, r24
+  store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+
+  ; CHECK-NEXT: sts     8, r23
+  ; CHECK-NEXT: sts     7, r22
+  ; CHECK-NEXT: sts     6, r21
+  ; CHECK-NEXT: sts     5, r20
+  store volatile i32 %b, i32* inttoptr (i64 5 to i32*)
+  ret void
+}
+
+; CHECK-LABEL: ret_void_args_i8_i8_i8_i8
+define void @ret_void_args_i8_i8_i8_i8(i8 %a, i8 %b, i8 %c, i8 %d) {
+  ; CHECK:      sts     4, r24
+  store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+  ; CHECK-NEXT: sts     5, r22
+  store volatile i8 %b, i8* inttoptr (i64 5 to i8*)
+  ; CHECK-NEXT: sts     6, r20
+  store volatile i8 %c, i8* inttoptr (i64 6 to i8*)
+  ; CHECK-NEXT: sts     7, r18
+  store volatile i8 %d, i8* inttoptr (i64 7 to i8*)
+  ret void
+}
+
+; CHECK-LABEL: ret_void_args_i32_16_i8
+define void @ret_void_args_i32_16_i8(i32 %a, i16 %b, i8 %c) {
+  ; CHECK:      sts     7, r25
+  ; CHECK-NEXT: sts     6, r24
+  ; CHECK-NEXT: sts     5, r23
+  ; CHECK-NEXT: sts     4, r22
+  store volatile i32 %a, i32* inttoptr (i64 4 to i32*)
+
+  ; CHECK-NEXT: sts     5, r21
+  ; CHECK-NEXT: sts     4, r20
+  store volatile i16 %b, i16* inttoptr (i64 4 to i16*)
+
+  ; CHECK-NEXT: sts     4, r18
+  store volatile i8 %c, i8* inttoptr (i64 4 to i8*)
+  ret void
+}
+
+; CHECK-LABEL: ret_void_args_i64
+define void @ret_void_args_i64(i64 %a) {
+  ; CHECK:      sts     11, r25
+  ; CHECK-NEXT: sts     10, r24
+  ; CHECK-NEXT: sts     9, r23
+  ; CHECK-NEXT: sts     8, r22
+  ; CHECK-NEXT: sts     7, r21
+  ; CHECK-NEXT: sts     6, r20
+  ; CHECK-NEXT: sts     5, r19
+  ; CHECK-NEXT: sts     4, r18
+  store volatile i64 %a, i64* inttoptr (i64 4 to i64*)
+  ret void
+}
+
+; CHECK-LABEL: ret_void_args_i64_i64
+define void @ret_void_args_i64_i64(i64 %a, i64 %b) {
+  ; CHECK:      sts     11, r25
+  ; CHECK-NEXT: sts     10, r24
+  ; CHECK-NEXT: sts     9, r23
+  ; CHECK-NEXT: sts     8, r22
+  ; CHECK-NEXT: sts     7, r21
+  ; CHECK-NEXT: sts     6, r20
+  ; CHECK-NEXT: sts     5, r19
+  ; CHECK-NEXT: sts     4, r18
+  store volatile i64 %a, i64* inttoptr (i64 4 to i64*)
+
+  ; CHECK-NEXT: sts     11, r17
+  ; CHECK-NEXT: sts     10, r16
+  ; CHECK-NEXT: sts     9, r15
+  ; CHECK-NEXT: sts     8, r14
+  ; CHECK-NEXT: sts     7, r13
+  ; CHECK-NEXT: sts     6, r12
+  ; CHECK-NEXT: sts     5, r11
+  ; CHECK-NEXT: sts     4, r10
+  store volatile i64 %b, i64* inttoptr (i64 4 to i64*)
+  ret void
+}
+
+; This is exactly enough to hit the limit of what can be passed
+; completely in registers.
+; CHECK-LABEL: ret_void_args_i64_i64_i16
+define void @ret_void_args_i64_i64_i16(i64 %a, i64 %b, i16 %c) {
+  ; CHECK:      sts     5, r9
+  ; CHECK-NEXT: sts     4, r8
+  store volatile i16 %c, i16* inttoptr (i64 4 to i16*)
+  ret void
+}