Fixup: fix uninitialized memory bug

This is a bug that already existed in the IR code, but wasn't getting triggered on existing test cases, and only seems to affect the 64-bit target right now.

The "key" value being constructed to cache and re-use constants during IR generation wasn't actually being fully initialized, and so garbage values in it could cause the lookup of an existing value to fail where it should succeed.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/slang/ir.cpp b/source/slang/ir.cpp
index e3647a47b..eadcd34d0 100644
--- a/source/slang/ir.cpp
+++ b/source/slang/ir.cpp
@@ -569,6 +569,7 @@ namespace Slang
         IRParentInst* parent = builder->shared->module;
 
         IRConstant keyInst;
+        memset(&keyInst, 0, sizeof(keyInst));
         keyInst.op = op;
         keyInst.type.usedValue = type;
         memcpy(&keyInst.u, value, valueSize);