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Author SHA1 Message Date
Zequan Wu 0f0c5af3db [COFF] Add cg_profile directive and .llvm.call-graph-profile section 
Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83597
 2020-07-10 17:07:30 -07:00
Michael J. Spencer ae6eeaea92 [MC] Add assembler support for .cg_profile. 
Object FIle Representation
At codegen time this is emitted into the ELF file a pair of symbol indices and a weight. In assembly it looks like:

.cg_profile a, b, 32
.cg_profile freq, a, 11
.cg_profile freq, b, 20

When writing an ELF file these are put into 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/D44965

llvm-svn: 333823
 2018-06-02 16:33:01 +00:00