[Orc][lli] Add a very simple Orc-based lazy JIT to lli.

This ensures that we're building and testing the CompileOnDemand layer, at least
in a basic way.

Currently x86-64 only, and with limited to no library calls enabled (depending
on host platform). Patches welcome. ;)

To enable access to the lazy JIT, this patch replaces the '-use-orcmcjit' lli
option with a new option:
'-jit-kind={ mcjit | orc-mcjit | orc-lazy }'.

All regression tests are updated to use the new option, and one trivial test of
the new lazy JIT is added.

llvm-svn: 233182

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/test/ExecutionEngine/OrcMCJIT/Inputs/multi-module-eh-b.ll b/llvm/test/ExecutionEngine/OrcMCJIT/Inputs/multi-module-eh-b.ll
new file mode 100644
index 00000000000..d7dbb032b5d
--- /dev/null
+++ b/llvm/test/ExecutionEngine/OrcMCJIT/Inputs/multi-module-eh-b.ll
@@ -0,0 +1,30 @@
+declare i8* @__cxa_allocate_exception(i64)
+declare void @__cxa_throw(i8*, i8*, i8*)
+declare i32 @__gxx_personality_v0(...)
+declare void @__cxa_end_catch()
+declare i8* @__cxa_begin_catch(i8*)
+
+@_ZTIi = external constant i8*
+
+define void @throwException_B() {
+  %exception = tail call i8* @__cxa_allocate_exception(i64 4)
+  call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null)
+  unreachable
+}
+
+define i32 @FB() {
+entry:
+  invoke void @throwException_B()
+          to label %try.cont unwind label %lpad
+
+lpad:
+  %p = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+          catch i8* bitcast (i8** @_ZTIi to i8*)
+  %e = extractvalue { i8*, i32 } %p, 0
+  call i8* @__cxa_begin_catch(i8* %e)
+  call void @__cxa_end_catch()
+  br label %try.cont
+
+try.cont:
+  ret i32 0
+}