[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, 21 insertions, 0 deletions

diff --git a/llvm/test/ExecutionEngine/OrcMCJIT/fpbitcast.ll b/llvm/test/ExecutionEngine/OrcMCJIT/fpbitcast.ll
new file mode 100644
index 00000000000..767b58016c6
--- /dev/null
+++ b/llvm/test/ExecutionEngine/OrcMCJIT/fpbitcast.ll
@@ -0,0 +1,21 @@
+; RUN: %lli -jit-kind=orc-mcjit -force-interpreter=true %s | FileCheck %s
+; CHECK: 40091eb8
+
+define i32 @test(double %x) {
+entry:
+	%x46.i = bitcast double %x to i64	
+	%tmp343.i = lshr i64 %x46.i, 32	
+	%tmp344.i = trunc i64 %tmp343.i to i32
+        ret i32 %tmp344.i
+}
+
+define i32 @main()
+{
+       %res = call i32 @test(double 3.14)
+       %ptr = getelementptr [4 x i8], [4 x i8]* @format, i32 0, i32 0
+       call i32 (i8*,...)* @printf(i8* %ptr, i32 %res)
+       ret i32 0
+}
+
+declare i32 @printf(i8*, ...)
+@format = internal constant [4 x i8] c"%x\0A\00"