1 files changed, 29 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/favor-low-reg-for-Osize.ll b/llvm/test/CodeGen/ARM/favor-low-reg-for-Osize.ll
new file mode 100644
index 00000000000..0ebdca3dbda
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/favor-low-reg-for-Osize.ll
@@ -0,0 +1,29 @@
+; REQUIRES: asserts
+; RUN: llc -debug-only=regalloc < %s 2>%t | FileCheck %s --check-prefix=CHECK
+; RUN: FileCheck %s < %t --check-prefix=DEBUG
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n8:16:32-S64"
+target triple = "thumbv7m--linux-gnueabi"
+
+
+; DEBUG:         AllocationOrder(GPR) = [ $r0 $r1 $r2 $r3 $r4 $r5 $r6 $r7 $r12 $lr $r8 $r9 $r10 $r11 ]
+
+define i32 @test_minsize(i32 %x) optsize minsize {
+; CHECK-LABEL: test_minsize:
+entry:
+; CHECK: mov     r4, r0
+  tail call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3}"()
+; CHECK: mov     r0, r4
+  ret i32 %x
+}
+
+; DEBUG: AllocationOrder(GPR) = [ $r0 $r1 $r2 $r3 $r12 $lr $r4 $r5 $r6 $r7 $r8 $r9 $r10 $r11 ]
+
+define i32 @test_optsize(i32 %x) optsize {
+; CHECK-LABEL: test_optsize:
+entry:
+; CHECK: mov     r12, r0
+  tail call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3}"()
+; CHECK: mov     r0, r12
+  ret i32 %x
+}