ARM: decide whether to use movw/movt based on "minsize" attribute.
llvm-svn: 196102
diff --git a/llvm/test/CodeGen/ARM/minsize-litpools.ll b/llvm/test/CodeGen/ARM/minsize-litpools.ll
new file mode 100644
index 0000000..d5cd2a9
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/minsize-litpools.ll
@@ -0,0 +1,26 @@
+; RUN: llc -mtriple=thumbv7s %s -o - | FileCheck %s
+; RUN: llc -mtriple=armv7s %s -o - | FileCheck %s
+
+; CodeGen should be able to set and reset the MinSize subtarget-feature, and
+; make use of it in deciding whether to use MOVW/MOVT for global variables or a
+; lit-pool load (saving roughly 2 bytes of code).
+
+@var = global i32 0
+
+define i32 @small_global() minsize {
+; CHECK-LABEL: small_global:
+; CHECK: ldr r[[GLOBDEST:[0-9]+]], {{.?LCPI0_0}}
+; CHECK: ldr r0, [r[[GLOBDEST]]]
+
+ %val = load i32* @var
+ ret i32 %val
+}
+
+define i32 @big_global() {
+; CHECK-LABEL: big_global:
+; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var
+; CHECK: movt [[GLOBDEST]], :upper16:var
+
+ %val = load i32* @var
+ ret i32 %val
+}