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properly forward baseline target cpu features to llvm

master
Andrew Kelley 2020-01-21 03:01:20 -05:00
parent 0abaee79af
commit 1f7babbc80
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GPG Key ID: 7C5F548F728501A9
5 changed files with 59 additions and 34 deletions
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84
src-self-hosted/stage1.zig
View File

@ -627,7 +627,7 @@ const Stage2CpuFeatures = struct {
const Self = @This();
fn createBaseline(allocator: *mem.Allocator) !*Self {
fn createBaseline(allocator: *mem.Allocator, arch: Target.Arch) !*Self {
const self = try allocator.create(Self);
errdefer allocator.destroy(self);
@ -641,10 +641,11 @@ const Stage2CpuFeatures = struct {
.allocator = allocator,
.cpu_features = .baseline,
.llvm_cpu_name = null,
.llvm_features_str = null,
.llvm_features_str = try initLLVMFeatures(allocator, arch, arch.baselineFeatures()),
.builtin_str = builtin_str,
.cache_hash = cache_hash,
};
return self;
}
@ -658,7 +659,7 @@ const Stage2CpuFeatures = struct {
const arch = target.Cross.arch;
const cpu_features = try cpuFeaturesFromLLVM(arch, llvm_cpu_name_z, llvm_cpu_features);
switch (cpu_features) {
.baseline => return createBaseline(allocator),
.baseline => return createBaseline(allocator, arch),
.cpu => |cpu| return createFromCpu(allocator, arch, cpu),
.features => |features| return createFromCpuFeatures(allocator, arch, features),
}
@ -688,6 +689,39 @@ const Stage2CpuFeatures = struct {
return self;
}
fn initLLVMFeatures(
allocator: *mem.Allocator,
arch: Target.Arch,
feature_set: Target.Cpu.Feature.Set,
) ![*:0]const u8 {
var llvm_features_buffer = try std.Buffer.initSize(allocator, 0);
defer llvm_features_buffer.deinit();
// First, disable all features.
// This way, we only get the ones the user requests.
const all_features = arch.allFeaturesList();
for (all_features) |feature| {
if (feature.llvm_name) |llvm_name| {
try llvm_features_buffer.append("-");
try llvm_features_buffer.append(llvm_name);
try llvm_features_buffer.append(",");
}
}
for (all_features) |feature, index| {
if (!feature_set.isEnabled(@intCast(u8, index))) continue;
if (feature.llvm_name) |llvm_name| {
try llvm_features_buffer.append("+");
try llvm_features_buffer.append(llvm_name);
try llvm_features_buffer.append(",");
}
}
if (mem.endsWith(u8, llvm_features_buffer.toSliceConst(), ",")) {
llvm_features_buffer.shrink(llvm_features_buffer.len() - 1);
}
return llvm_features_buffer.toOwnedSlice().ptr;
}
fn createFromCpuFeatures(
allocator: *mem.Allocator,
arch: Target.Arch,
@ -710,38 +744,14 @@ const Stage2CpuFeatures = struct {
);
defer builtin_str_buffer.deinit();
var llvm_features_buffer = try std.Buffer.initSize(allocator, 0);
defer llvm_features_buffer.deinit();
// First, disable all features.
// This way, we only get the ones the user requests.
const all_features = arch.allFeaturesList();
for (all_features) |feature| {
if (feature.llvm_name) |llvm_name| {
try llvm_features_buffer.append("-");
try llvm_features_buffer.append(llvm_name);
try llvm_features_buffer.append(",");
}
}
for (all_features) |feature, index| {
for (arch.allFeaturesList()) |feature, index| {
if (!feature_set.isEnabled(@intCast(u8, index))) continue;
if (feature.llvm_name) |llvm_name| {
try llvm_features_buffer.append("+");
try llvm_features_buffer.append(llvm_name);
try llvm_features_buffer.append(",");
}
try builtin_str_buffer.append(" .");
try builtin_str_buffer.append(feature.name);
try builtin_str_buffer.append(",\n");
}
if (mem.endsWith(u8, llvm_features_buffer.toSliceConst(), ",")) {
llvm_features_buffer.shrink(llvm_features_buffer.len() - 1);
}
try builtin_str_buffer.append(
\\ }),
\\};
@ -752,7 +762,7 @@ const Stage2CpuFeatures = struct {
.allocator = allocator,
.cpu_features = .{ .features = feature_set },
.llvm_cpu_name = null,
.llvm_features_str = llvm_features_buffer.toOwnedSlice().ptr,
.llvm_features_str = try initLLVMFeatures(allocator, arch, feature_set),
.builtin_str = builtin_str_buffer.toOwnedSlice(),
.cache_hash = cache_hash,
};
@ -843,13 +853,25 @@ fn parseFeatures(zig_triple: [*:0]const u8, features_text: [*:0]const u8) !*Stag
}
// ABI warning
export fn stage2_cpu_features_baseline(result: **Stage2CpuFeatures) Error {
result.* = Stage2CpuFeatures.createBaseline(std.heap.c_allocator) catch |err| switch (err) {
export fn stage2_cpu_features_baseline(result: **Stage2CpuFeatures, zig_triple: [*:0]const u8) Error {
result.* = cpuFeaturesBaseline(zig_triple) catch |err| switch (err) {
error.OutOfMemory => return .OutOfMemory,
error.UnknownArchitecture => return .UnknownArchitecture,
error.UnknownSubArchitecture => return .UnknownSubArchitecture,
error.UnknownOperatingSystem => return .UnknownOperatingSystem,
error.UnknownApplicationBinaryInterface => return .UnknownApplicationBinaryInterface,
error.MissingOperatingSystem => return .MissingOperatingSystem,
error.MissingArchitecture => return .MissingArchitecture,
};
return .None;
}
fn cpuFeaturesBaseline(zig_triple: [*:0]const u8) !*Stage2CpuFeatures {
const target = try Target.parse(mem.toSliceConst(u8, zig_triple));
const arch = target.Cross.arch;
return Stage2CpuFeatures.createBaseline(std.heap.c_allocator, arch);
}
// ABI warning
export fn stage2_cpu_features_llvm(
result: **Stage2CpuFeatures,

2
src/codegen.cpp
View File

@ -8802,6 +8802,8 @@ static void init(CodeGen *g) {
target_specific_cpu_args = stage2_cpu_features_get_llvm_cpu(g->zig_target->cpu_features);
target_specific_features = stage2_cpu_features_get_llvm_features(g->zig_target->cpu_features);
}
//fprintf(stderr, "name=%s target_specific_cpu_args=%s\n", buf_ptr(g->root_out_name), target_specific_cpu_args);
//fprintf(stderr, "name=%s target_specific_features=%s\n", buf_ptr(g->root_out_name), target_specific_features);
g->target_machine = ZigLLVMCreateTargetMachine(target_ref, buf_ptr(&g->llvm_triple_str),
target_specific_cpu_args, target_specific_features, opt_level, reloc_mode,

2
src/main.cpp
View File

@ -1005,7 +1005,7 @@ int main(int argc, char **argv) {
return main_exit(root_progress_node, EXIT_FAILURE);
}
} else {
if ((err = stage2_cpu_features_baseline(&target.cpu_features))) {
if ((err = stage2_cpu_features_baseline(&target.cpu_features, buf_ptr(&zig_triple_buf)))) {
fprintf(stderr, "unable to determine baseline CPU features: %s\n", err_str(err));
return main_exit(root_progress_node, EXIT_FAILURE);
}

2
src/userland.cpp
View File

@ -104,7 +104,7 @@ Error stage2_cpu_features_parse_features(Stage2CpuFeatures **out, const char *zi
const char *msg = "stage0 called stage2_cpu_features_parse_features";
stage2_panic(msg, strlen(msg));
}
Error stage2_cpu_features_baseline(Stage2CpuFeatures **out) {
Error stage2_cpu_features_baseline(Stage2CpuFeatures **out, const char *zig_triple) {
Stage2CpuFeatures *result = allocate<Stage2CpuFeatures>(1, "Stage2CpuFeatures");
result->builtin_str = ".baseline;\n";
result->cache_hash = "\n\n";

3
src/userland.h
View File

@ -192,7 +192,8 @@ ZIG_EXTERN_C Error stage2_cpu_features_parse_features(struct Stage2CpuFeatures *
const char *zig_triple, const char *features);
// ABI warning
ZIG_EXTERN_C Error stage2_cpu_features_baseline(struct Stage2CpuFeatures **result);
ZIG_EXTERN_C Error stage2_cpu_features_baseline(struct Stage2CpuFeatures **result,
const char *zig_triple);
// ABI warning
ZIG_EXTERN_C Error stage2_cpu_features_llvm(struct Stage2CpuFeatures **result,