ARM: support PIC on Windows on ARM
Handle lowering of global addresses for PIC mode compilation on Windows. Always
use the movw/movt load to load the address as Windows on ARM requires ARMv7+ and
is a pure Thumb environment.
llvm-svn: 208385
diff --git a/llvm/test/CodeGen/ARM/Windows/pic.ll b/llvm/test/CodeGen/ARM/Windows/pic.ll
new file mode 100644
index 0000000..28d371f
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/Windows/pic.ll
@@ -0,0 +1,16 @@
+; RUN: llc -mtriple thumbv7-windows-itanium -relocation-model pic -filetype asm -o - %s \
+; RUN: | FileCheck %s
+
+@external = external global i8
+
+define arm_aapcs_vfpcc i8 @return_external() {
+entry:
+ %0 = load i8* @external, align 1
+ ret i8 %0
+}
+
+; CHECK-LABEL: return_external
+; CHECK: movw r0, :lower16:external
+; CHECK: movt r0, :upper16:external
+; CHECK: ldrb r0, [r0]
+