[Thumb-1] Add optimized constant materialization for integers [256..512)
We can materialize these integers using a MOV; ADDi8 pair.
llvm-svn: 272007
diff --git a/llvm/test/CodeGen/Thumb/constants.ll b/llvm/test/CodeGen/Thumb/constants.ll
new file mode 100644
index 0000000..34c0813
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb/constants.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -mcpu=cortex-m0 -verify-machineinstrs | FileCheck --check-prefix CHECK-T1 %s
+; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -mcpu=cortex-m3 -verify-machineinstrs | FileCheck --check-prefix CHECK-T2 %s
+
+; CHECK-T1-LABEL: @mov_and_add
+; CHECK-T2-LABEL: @mov_and_add
+; CHECK-T1: movs r0, #255
+; CHECK-T1: adds r0, #12
+; CHECK-T2: movw r0, #267
+define i32 @mov_and_add() {
+ ret i32 267
+}