bjoernager/rust
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fully exploited the dropped support of LLVM 8

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This commit grepped for LLVM_VERSION_GE, LLVM_VERSION_LT, get_major_version and
min-llvm-version and statically evaluated every expression possible
(and sensible) assuming that the LLVM version is >=9 now
This commit is contained in:
DevJPM 2020-11-07 23:25:45 +01:00
parent 6830f1c6e2
commit b51bcc72d9
9 changed files with 8 additions and 73 deletions
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14
compiler/rustc_codegen_llvm/src/attributes.rs
View file

@ -147,17 +147,9 @@ fn set_probestack(cx: &CodegenCx<'ll, '_>, llfn: &'ll Value) {
fn translate_obsolete_target_features(feature: &str) -> &str {
const LLVM9_FEATURE_CHANGES: &[(&str, &str)] =
&[("+fp-only-sp", "-fp64"), ("-fp-only-sp", "+fp64"), ("+d16", "-d32"), ("-d16", "+d32")];
if llvm_util::get_major_version() >= 9 {
for &(old, new) in LLVM9_FEATURE_CHANGES {
if feature == old {
return new;
}
}
} else {
for &(old, new) in LLVM9_FEATURE_CHANGES {
if feature == new {
return old;
}
for &(old, new) in LLVM9_FEATURE_CHANGES {
if feature == old {
return new;
}
}
feature

5
compiler/rustc_codegen_llvm/src/back/write.rs
View file

@ -377,11 +377,6 @@ fn get_pgo_use_path(config: &ModuleConfig) -> Option<CString> {
}
pub(crate) fn should_use_new_llvm_pass_manager(config: &ModuleConfig) -> bool {
// We only support the new pass manager starting with LLVM 9.
if llvm_util::get_major_version() < 9 {
return false;
}
// The new pass manager is disabled by default.
config.new_llvm_pass_manager
}

3
compiler/rustc_codegen_llvm/src/context.rs
View file

@ -119,9 +119,6 @@ pub unsafe fn create_module(
let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx);
let mut target_data_layout = sess.target.data_layout.clone();
if llvm_util::get_major_version() < 9 {
target_data_layout = strip_function_ptr_alignment(target_data_layout);
}
if llvm_util::get_major_version() < 10
&& (sess.target.arch == "x86" || sess.target.arch == "x86_64")
{

8
compiler/rustc_codegen_llvm/src/llvm_util.rs
View file

@ -104,7 +104,7 @@ unsafe fn configure_llvm(sess: &Session) {
}
}
if sess.opts.debugging_opts.llvm_time_trace && get_major_version() >= 9 {
if sess.opts.debugging_opts.llvm_time_trace {
// time-trace is not thread safe and running it in parallel will cause seg faults.
if !sess.opts.debugging_opts.no_parallel_llvm {
bug!("`-Z llvm-time-trace` requires `-Z no-parallel-llvm")
@ -122,10 +122,8 @@ unsafe fn configure_llvm(sess: &Session) {
pub fn time_trace_profiler_finish(file_name: &str) {
unsafe {
if get_major_version() >= 9 {
let file_name = CString::new(file_name).unwrap();
llvm::LLVMTimeTraceProfilerFinish(file_name.as_ptr());
}
let file_name = CString::new(file_name).unwrap();
llvm::LLVMTimeTraceProfilerFinish(file_name.as_ptr());
}
}