commit 53f2a69c199d12dc348616dbf4800d321670ca6f
author Alastair Donaldson <afdx@google.com> Thu Oct 22 12:06:54 2020 +0100
committer GitHub <noreply@github.com> Thu Oct 22 12:06:54 2020 +0100
tree 6c54d8ed47037565c7ba48cfb7c9c1e5f396c301
parent de2c0ba202c18151b93e3bf9e2f0743b831493e4

spirv-fuzz: Pass OpUndef in function call if needed (#3978)

Fixes #3977.

source/fuzz/fuzzer_pass_add_function_calls.cpp

diff --git a/source/fuzz/fuzzer_pass_add_function_calls.cpp b/source/fuzz/fuzzer_pass_add_function_calls.cpp
index b6f4c85..7400557 100644
--- a/source/fuzz/fuzzer_pass_add_function_calls.cpp
+++ b/source/fuzz/fuzzer_pass_add_function_calls.cpp
@@ -141,9 +141,13 @@
     assert(param_type && "Parameter has invalid type");
 
     if (!param_type->AsPointer()) {
-      // We mark the constant as irrelevant so that we can replace it with a
-      // more interesting value later.
-      result.push_back(FindOrCreateZeroConstant(param->type_id(), true));
+      if (fuzzerutil::CanCreateConstant(GetIRContext(), param->type_id())) {
+        // We mark the constant as irrelevant so that we can replace it with a
+        // more interesting value later.
+        result.push_back(FindOrCreateZeroConstant(param->type_id(), true));
+      } else {
+        result.push_back(FindOrCreateGlobalUndef(param->type_id()));
+      }
       continue;
     }