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4 Commits

Author SHA1 Message Date
Fangrui Song 962b29d716 ELFObjectWriter: Don't sort non-local symbols 
As we don't sort local symbols, don't sort non-local symbols.  This makes
non-local symbols appear in their register order, which matches GNU as. The
register order is nice in that you can write tests with interleaved CHECK
prefixes, e.g.

```
// CHECK: something about foo
.globl foo
foo:
// CHECK: something about bar
.globl bar
bar:
```

With the lexicographical order, the user needs to place lexicographical smallest
symbol first or keep CHECK prefixes in one place.
 2021-02-13 10:32:27 -08:00
Fangrui Song d4306e90cb [ELF][X86] Allow PT_LOAD to have overlapping p_offset ranges on EM_X86_64 
Port the D64906 technique to EM_X86_64.

Differential Revision: https://reviews.llvm.org/D67482

llvm-svn: 371958
 2019-09-16 07:05:34 +00:00
Fangrui Song cc18f8aa0f [ELF] Add --{,no-}call-graph-profile-sort (enabled by default) 
Summary: Add an option to disable sorting sections with call graph profile

Reviewers: ruiu, Bigcheese, espindola

Reviewed By: Bigcheese

Subscribers: grimar, emaste, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D53683

llvm-svn: 345332
 2018-10-25 23:15:23 +00:00
Michael J. Spencer 8222f902ca [ELF] Read the call graph profile from object files. 
This uses the call graph profile embedded in the object files to construct the call graph.

This is read from a SHT_LLVM_CALL_GRAPH_PROFILE (0x6fff4c02) section as (uint32_t, uint32_t, uint64_t) tuples as (from symbol index, to symbol index, weight).

Differential Revision: https://reviews.llvm.org/D45850

llvm-svn: 343552
 2018-10-02 00:17:15 +00:00