Implements include/exclude register lists for translation.

tests_lit/llvm2ice_tests/unknown-arm-reg.ll

Index: tests_lit/llvm2ice_tests/unknown-arm-reg.ll
diff --git a/tests_lit/llvm2ice_tests/unknown-arm-reg.ll b/tests_lit/llvm2ice_tests/unknown-arm-reg.ll
new file mode 100644
index 0000000000000000000000000000000000000000..64365e46639244b0ef0eb8d9578af5f4116ddacb
--- /dev/null
+++ b/tests_lit/llvm2ice_tests/unknown-arm-reg.ll
@@ -0,0 +1,19 @@
+; Show that we complain if an unknown register is specified on the command line.
+
+; Compile using standalone assembler.
+; RUN: %p2i --expect-fail --filetype=asm -i %s --target=arm32 --args -Om1 \
+; RUN:   -reg-use r2,xx9x,r5 2>&1 \
+; RUN:   | FileCheck %s --check-prefix=USE
+
+; Compile using standalone assembler.
+; RUN: %p2i --expect-fail --filetype=asm -i %s --target=arm32 --args -Om1 \
+; RUN:   -reg-exclude r2,xx9x,r5 2>&1 \
+; RUN:   | FileCheck %s --check-prefix=EXC
+
+define void @foo() {
+  ret void
+}
+
+; USE: LLVM ERROR: Can't find register use: xx9x

[Jim Stichnoth, 2016/01/15 00:50:56]

If you take my suggestion about reporting *all* botched register names, go ahead
and put two bogus includes and check for that error.

[Karl, 2016/01/15 16:54:25]

Done.

+; EXC: LLVM ERROR: Can't find register exclude: xx9x
+

[Jim Stichnoth, 2016/01/15 00:50:56]

Delete trailing whitespace (blank line).

[Karl, 2016/01/15 16:54:25]

Done.