[Nios2] Arithmetic instructions for R1 and R2 ISA.

Summary:
This commit enables some of the arithmetic instructions for Nios2 ISA (for both
R1 and R2 revisions), implements facilities required to emit those instructions
and provides LIT tests for added instructions.

Reviewed By: hfinkel

Differential Revision: https://reviews.llvm.org/D41236

Author: belickim <mateusz.belicki@intel.com>
llvm-svn: 322069

1 files changed, 26 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Nios2/shift-rotate.ll b/llvm/test/CodeGen/Nios2/shift-rotate.ll
new file mode 100644
index 00000000000..d3084b5fb59
--- /dev/null
+++ b/llvm/test/CodeGen/Nios2/shift-rotate.ll
@@ -0,0 +1,26 @@
+; RUN: llc < %s -march=nios2 2>&1 | FileCheck %s
+; RUN: llc < %s -march=nios2 -target-abi=nios2r2 2>&1 | FileCheck %s
+
+define i32 @sll_reg(i32 %a, i32 %b) nounwind {
+entry:
+; CHECK: sll_reg:
+; CHECK:   sll r2, r4, r5
+  %c = shl i32 %a, %b
+  ret i32 %c
+}
+
+define i32 @srl_reg(i32 %a, i32 %b) nounwind {
+entry:
+; CHECK: srl_reg:
+; CHECK:   srl r2, r4, r5
+  %c = lshr i32 %a, %b
+  ret i32 %c
+}
+
+define i32 @sra_reg(i32 %a, i32 %b) nounwind {
+entry:
+; CHECK: sra_reg:
+; CHECK:   sra r2, r4, r5
+  %c = ashr i32 %a, %b
+  ret i32 %c
+}