Patch from https://github.com/digego/extempore/issues/318

diff --git a/include/llvm/IR/ValueMap.h.orig b/include/llvm/IR/ValueMap.h
index ad518ac..d928f6a 100644
--- a/include/llvm/IR/ValueMap.h
+++ b/include/llvm/IR/ValueMap.h
@@ -99,7 +99,7 @@
   explicit ValueMap(const ExtraData &Data, unsigned NumInitBuckets = 64)
       : Map(NumInitBuckets), Data(Data) {}
 
-  bool hasMD() const { return MDMap; }
+  bool hasMD() const { return static_cast<bool>(MDMap); }
   MDMapT &MD() {
     if (!MDMap)
       MDMap.reset(new MDMapT);
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<tr><td><span title='2021-06-23 23:35:27 +0200'>2021-06-23</span></td><td><a href='/guix/commit/build-aux/compile-all.scm?id=ef82ba9dd94369926eb13325d5e7da4306d23dd7'>build: Makefile splits Scheme compilation in four steps.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-06-18 14:18:06 +0200'>2021-06-18</span></td><td><a href='/guix/commit/build-aux/compile-all.scm?id=003728cfab907be5df1411c5faaf466a2b8d5ba2'>build: Remove Guile 2.2 workaround.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-04-12 00:00:59 +0200'>2020-04-12</span></td><td><a href='/guix/commit/build-aux/compile-all.scm?id=27a1e4fd109f6df9f687958cfead0d3e41e330aa'>build: Cap build parallelism on i686.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>