From db589dd64e390424188a3f63756fa4ec8fdb8c46 Mon Sep 17 00:00:00 2001
From: Zoltan Varga <vargaz@gmail.com>
Date: Wed, 5 May 2021 23:19:00 -0400
Subject: [PATCH] [mono][aot] Avoid compiling huge (> 100K IL) methods with
 llvm on wasm. (#52346)

The compile times are too long (> 10 minutes).
---
 src/mono/mono/mini/mini-llvm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mono/mono/mini/mini-llvm.c b/src/mono/mono/mini/mini-llvm.c
index 7abb8b5..755a059 100644
--- a/src/mono/mono/mini/mini-llvm.c
+++ b/src/mono/mono/mini/mini-llvm.c
@@ -11631,6 +11631,14 @@ emit_method_inner (EmitContext *ctx)
 		return;
 	}
 
+#ifdef TARGET_WASM
+	if (ctx->module->interp && cfg->header->code_size > 100000) {
+		/* Large methods slow down llvm too much */
+		set_failure (ctx, "il code too large.");
+		return;
+	}
+#endif
+
 	header = cfg->header;
 	for (i = 0; i < header->num_clauses; ++i) {
 		clause = &header->clauses [i];
-- 
2.7.4