[mono][aot] Fixed decompose_flag propagation, addresses #79710 (#79849)

diff --git a/src/mono/mono/mini/branch-opts.c b/src/mono/mono/mini/branch-opts.c
index 5d14e51..ca60388 100644 (file)
--- a/src/mono/mono/mini/branch-opts.c
+++ b/src/mono/mono/mini/branch-opts.c
@@ -428,6 +428,9 @@ mono_if_conversion (MonoCompile *cfg)
                        mono_bblock_insert_before_ins (bb, compare, ins2);
                        mono_bblock_insert_before_ins (bb, ins2, ins1);
 
+                       bb->needs_decompose |= true_bb->needs_decompose;
+                       bb->needs_decompose |= false_bb->needs_decompose;
+
                        /* Add cmov instruction */
                        MONO_INST_NEW (cfg, cmov, OP_NOP);
                        cmov->dreg = dreg;