handle as best we can surprising types for legalized bitcasts. fixes #701

1 files changed, 6 insertions, 0 deletions

diff --git a/src/analyzer.js b/src/analyzer.js
index fa8aee59..c09739e9 100644
--- a/src/analyzer.js
+++ b/src/analyzer.js
@@ -467,6 +467,12 @@ function analyzer(data, sidePass) {
                       break;
                     }
                     case 'bitcast': {
+                      if (!sourceBits) {
+                        // we can be asked to bitcast doubles or such to integers, handle that as best we can (if it's a double that
+                        // was an x86_fp80, this code will likely break when called)
+                        sourceBits = targetBits = Runtime.getNativeTypeSize(value.params[0].type);
+                        warn('legalizing non-integer bitcast on ll #' + item.lineNum);
+                      }
                       break;
                     }
                     case 'select': {