vendor/llvm/llvm-release_801-r366581vendor/llvm/llvm-release_80-r364487vendor/llvm/llvm-release_80-r363030vendor/llvm-80

1 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/AVR/hardware-mul.ll b/test/CodeGen/AVR/hardware-mul.ll
new file mode 100644
index 0000000000000..650697857b76b
--- /dev/null
+++ b/test/CodeGen/AVR/hardware-mul.ll
@@ -0,0 +1,30 @@
+; RUN: llc -mattr=mul,movw < %s -march=avr | FileCheck %s
+
+; Tests lowering of multiplication to hardware instructions.
+
+define i8 @mult8(i8 %a, i8 %b) {
+; CHECK-LABEL: mult8:
+; CHECK: muls r22, r24
+; CHECK: clr r1
+; CHECK: mov  r24, r0
+  %mul = mul i8 %b, %a
+  ret i8 %mul
+}
+
+define i16 @mult16(i16 %a, i16 %b) {
+; CHECK-LABEL: mult16:
+; CHECK: muls r22, r25
+; CHECK: mov  r18, r0
+; CHECK: mul  r22, r24
+; CHECK: mov  r19, r0
+; CHECK: mov  r20, r1
+; CHECK: clr r1
+; CHECK: add  r20, r18
+; CHECK: muls r23, r24
+; CHECK: clr r1
+; CHECK: mov  r22, r0
+; CHECK: add  r22, r20
+; :TODO: finish after reworking shift instructions
+  %mul = mul nsw i16 %b, %a
+  ret i16 %mul
+}