[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, 17 insertions, 0 deletions

diff --git a/llvm/test/ExecutionEngine/OrcMCJIT/2003-06-04-bzip2-bug.ll b/llvm/test/ExecutionEngine/OrcMCJIT/2003-06-04-bzip2-bug.ll
new file mode 100644
index 00000000000..942b8362c70
--- /dev/null
+++ b/llvm/test/ExecutionEngine/OrcMCJIT/2003-06-04-bzip2-bug.ll
@@ -0,0 +1,17 @@
+; RUN: %lli -jit-kind=orc-mcjit %s > /dev/null
+
+; Testcase distilled from 256.bzip2.
+
+define i32 @main() {
+entry:
+	br label %loopentry.0
+loopentry.0:		; preds = %loopentry.0, %entry
+	%h.0 = phi i32 [ %tmp.2, %loopentry.0 ], [ -1, %entry ]		; <i32> [#uses=1]
+	%tmp.2 = add i32 %h.0, 1		; <i32> [#uses=3]
+	%tmp.4 = icmp ne i32 %tmp.2, 0		; <i1> [#uses=1]
+	br i1 %tmp.4, label %loopentry.0, label %loopentry.1
+loopentry.1:		; preds = %loopentry.0
+	%h.1 = phi i32 [ %tmp.2, %loopentry.0 ]		; <i32> [#uses=1]
+	ret i32 %h.1
+}
+