[ELF]: --icf: don't fold sections referencing sections with LCDA after D84610

lld/ELF/ICF.cpp

@@ -468,9 +468,10 @@ template <class ELFT> void ICF<ELFT>::run() {
   //
   // If two .gcc_except_table have identical semantics (usually identical
   // content with PC-relative encoding), we will lose folding opportunity.
+  uint32_t uniqueId = 0;
   for (Partition &part : partitions)
     part.ehFrame->iterateFDEWithLSDA<ELFT>(
-        [&](InputSection &s) { s.eqClass[0] = 1; });
+        [&](InputSection &s) { s.eqClass[0] = ++uniqueId; });
 
   // Collect sections to merge.
   for (InputSectionBase *sec : inputSections) {

lld/test/ELF/icf-eh-frame.s

@@ -41,3 +41,10 @@ _Z1dv:
 .section .gcc_except_table,"a",@progbits
 ## The actual content does not matter.
 .Lexception0:
+
+## .rodata.Z1[ab]v reference .text.Z1[ab]v. Dont fold them.
+.section .rodata.Z1av,"a",@progbits
+  .long .text.Z1av - .
+
+.section .rodata.Z1bv,"a",@progbits
+  .long .text.Z1bv - .