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[Bug target/64580] New: very high rs6000_stack_info() usage during LTO Firefox build on ppc64
- From: "trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 13 Jan 2015 11:31:47 +0000
- Subject: [Bug target/64580] New: very high rs6000_stack_info() usage during LTO Firefox build on ppc64
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64580
Bug ID: 64580
Summary: very high rs6000_stack_info() usage during LTO Firefox
build on ppc64
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: segher at gcc dot gnu.org
Host: powerpc64-unknown-linux-gnu
Target: powerpc64-unknown-linux-gnu
Build: powerpc64-unknown-linux-gnu
"perf top" shows very high rs6000_stack_info() usage during final LTO link of
libxul (Firefox) on ppc64, e.g.:
31.34% lto1 [.] rs6000_stack_info()
rs6000_stack_info()
rs6000_stack_info()
rs6000_output_function_prologue(_IO_FILE*, long)
final_start_function(rtx_insn*, _IO_FILE*, int)
rs6000_output_mi_thunk(_IO_FILE*, tree_node*, long, long,
tree_node*)
cgraph_node::expand_thunk(bool, bool)
cgraph_node::assemble_thunks_and_aliases()
cgraph_node::assemble_thunks_and_aliases()
cgraph_node::expand()
symbol_table::compile()
lto_main()
compile_file()
1.36% cc1plus [.] _cpp_lex_token
...
powerpc64-unknown-linux-gnu