bjoernager/rust
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Remove checks for LLVM < 4.0

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While we still have to support LLVM 4.0 for Emscripten, we can
drop checks for LLVM >= 4.0 and < 4.0.
This commit is contained in:
Nikita Popov 2018-11-01 21:06:50 +01:00
parent f6e9a6e41c
commit d794597698
8 changed files with 6 additions and 215 deletions
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23
src/librustc_codegen_llvm/back/write.rs
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@ -10,7 +10,7 @@
use attributes;
use back::bytecode::{self, RLIB_BYTECODE_EXTENSION};
use back::lto::{self, ModuleBuffer, ThinBuffer, SerializedModule};
use back::lto::{self, ThinBuffer, SerializedModule};
use back::link::{self, get_linker, remove};
use back::command::Command;
use back::linker::LinkerInfo;
@ -564,8 +564,8 @@ unsafe fn optimize(cgcx: &CodegenContext,
// Some options cause LLVM bitcode to be emitted, which uses ThinLTOBuffers, so we need
// to make sure we run LLVM's NameAnonGlobals pass when emitting bitcode; otherwise
// we'll get errors in LLVM.
let using_thin_buffers = llvm::LLVMRustThinLTOAvailable() && (config.emit_bc
|| config.obj_is_bitcode || config.emit_bc_compressed || config.embed_bitcode);
let using_thin_buffers = config.emit_bc || config.obj_is_bitcode
|| config.emit_bc_compressed || config.embed_bitcode;
let mut have_name_anon_globals_pass = false;
if !config.no_prepopulate_passes {
llvm::LLVMRustAddAnalysisPasses(tm, fpm, llmod);
@ -729,15 +729,8 @@ unsafe fn codegen(cgcx: &CodegenContext,
if write_bc || config.emit_bc_compressed || config.embed_bitcode {
let thin;
let old;
let data = if llvm::LLVMRustThinLTOAvailable() {
thin = ThinBuffer::new(llmod);
thin.data()
} else {
old = ModuleBuffer::new(llmod);
old.data()
};
let thin = ThinBuffer::new(llmod);
let data = thin.data();
timeline.record("make-bc");
if write_bc {
@ -1385,12 +1378,8 @@ fn execute_optimize_work_item(cgcx: &CodegenContext,
// builds we don't actually want to LTO the allocator modules if
// it shows up. This is due to various linker shenanigans that
// we'll encounter later.
//
// Additionally here's where we also factor in the current LLVM
// version. If it doesn't support ThinLTO we skip this.
Lto::ThinLocal => {
module.kind != ModuleKind::Allocator &&
unsafe { llvm::LLVMRustThinLTOAvailable() }
module.kind != ModuleKind::Allocator
}
};