ARM: stop emitting blx instructions for most calls on MachO.

I'm really not sure why we were in the first place, it's the linker's job to
convert between BL/BLX as necessary. Even worse, using BLX left Thumb calls
that could be locally resolved completely unencodable since all offsets to BLX
are multiples of 4.

rdar://26182344

llvm-svn: 269101

1 files changed, 20 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/local-call.ll b/llvm/test/CodeGen/ARM/local-call.ll
new file mode 100644
index 00000000000..a38df62ff90
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/local-call.ll
@@ -0,0 +1,20 @@
+; RUN: llc -mtriple=thumbv7-apple-ios -filetype=obj %s -o %t
+; RUN: llvm-objdump -macho -d %t | FileCheck %s
+
+; This function just messes up the offsets enough to make the libcall in
+; test_local_call unencodable with a blx.
+define void @thing() {
+  ret void
+}
+
+define i64 @__udivdi3(i64 %a, i64 %b) {
+  ret i64 %b
+}
+
+define i64 @test_local_call(i64 %a, i64 %b) {
+; CHECK-LABEL: test_local_call:
+; CHECK: bl ___udivdi3
+
+%res = udiv i64 %a, %b
+  ret i64 %res
+}
\ No newline at end of file