[ARM] Add a first test for the Thumb-2 code size optimization pass.

While working on a Thumb-2 code size optimization I just realized that we don't have any regression tests for it.

So here's a first test case, I plan to increase the coverage over time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216728 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/thumb2-size-opt.ll b/test/CodeGen/ARM/thumb2-size-opt.ll
new file mode 100644 (file)
index 0000000..f98eb92
--- /dev/null
+++ b/test/CodeGen/ARM/thumb2-size-opt.ll
@@ -0,0 +1,12 @@
+; RUN: llc -mtriple=thumbv7-linux-gnueabihf -o - -show-mc-encoding -t2-reduce-limit2=0 %s | FileCheck %s
+; RUN: llc -mtriple=thumbv7-linux-gnueabihf -o - -show-mc-encoding %s | FileCheck %s --check-prefix=CHECK-OPT
+
+define i32 @and(i32 %a, i32 %b) nounwind readnone {
+; CHECK-LABEL: and:
+; CHECK: and.w r{{[0-9]+}}, r{{[0-9]+}}, r{{[0-9]+}} @ encoding: [{{0x..,0x..,0x..,0x..}}]
+; CHECK-OPT: ands r{{[0-9]+}}, r{{[0-9]+}}  @ encoding: [{{0x..,0x..}}]
+entry:
+  %and = and i32 %b, %a
+  ret i32 %and
+}
+