| commit 164a02d0fa461c623446bb5e3ee15516bcfad13c |
| Author: Fangrui Song <maskray@google.com> |
| Date: Fri Aug 7 13:42:09 2020 -0700 |
| |
| [ELF]: --icf: don't fold sections referencing sections with LCDA after D84610 |
| |
| diff --git a/lld/ELF/ICF.cpp b/lld/ELF/ICF.cpp |
| index c9d922f558d..f3c477c1d2c 100644 |
| --- a/lld/ELF/ICF.cpp |
| +++ b/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) { |
| diff --git a/lld/test/ELF/icf-eh-frame.s b/lld/test/ELF/icf-eh-frame.s |
| index e90df5f96d9..0b895ec8cc2 100644 |
| --- a/lld/test/ELF/icf-eh-frame.s |
| +++ b/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 - . |
