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Do some basic validation of Target Features (#7986) #7987

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merged 9 commits into from
Dec 8, 2023
Merged

Do some basic validation of Target Features (#7986) #7987

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da0396d
Do some basic validation of Target Features (#7986)
steven-johnson Dec 6, 2023
ed80bc9
Update Target.cpp
steven-johnson Dec 6, 2023
58fdc54
Update Target.cpp
steven-johnson Dec 6, 2023
f619ad4
Fixes
steven-johnson Dec 6, 2023
ceefb6f
Update Target.cpp
steven-johnson Dec 7, 2023
5dce074
Improve error messaging.
steven-johnson Dec 8, 2023
fe4a6f2
format
steven-johnson Dec 8, 2023
2e2677f
Merge branch 'main' into srj/bad-targets
steven-johnson Dec 8, 2023
2ad9fe0
Update Target.cpp
steven-johnson Dec 8, 2023
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92 changes: 92 additions & 0 deletions src/Target.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -788,6 +788,98 @@ void bad_target_string(const std::string &target) {

} // namespace

void Target::validate_features() const {
// Note that the features don't have to be exhaustive, but enough to avoid obvious mistakes is good.
if (arch == X86) {
static const std::vector<Feature> bad_features_x86 = {
ARMDotProd,
ARMFp16,
ARMv7s,
ARMv81a,
HVX_128,
HVX_128,
HVX_v62,
HVX_v65,
HVX_v66,
NoNEON,
POWER_ARCH_2_07,
RVV,
SVE,
SVE2,
VSX,
WasmBulkMemory,
WasmSatFloatToInt,
WasmSignExt,
WasmSimd128,
WasmThreads,
};
user_assert(!features_any_of(bad_features_x86)) << "At least os_entry of the features for "
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"os_entry"?

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oops fixed

<< *this << " is incompatible with the Target's architecture.";
} else if (arch == ARM) {
static const std::vector<Feature> bad_features_arm = {
AVX,
AVX2,
AVX512,
AVX512_Cannonlake,
AVX512_KNL,
AVX512_SapphireRapids,
AVX512_Skylake,
AVX512_Zen4,
F16C,
FMA,
FMA4,
HVX_128,
HVX_128,
HVX_v62,
HVX_v65,
HVX_v66,
POWER_ARCH_2_07,
RVV,
SSE41,
VSX,
WasmBulkMemory,
WasmSatFloatToInt,
WasmSignExt,
WasmSimd128,
WasmThreads,
};
user_assert(!features_any_of(bad_features_arm)) << "At least os_entry of the features for "
<< *this << " is incompatible with the Target's architecture.";
} else if (arch == WebAssembly) {
static const std::vector<Feature> bad_features_wasm = {
ARMDotProd,
ARMFp16,
ARMv7s,
ARMv81a,
AVX,
AVX2,
AVX512,
AVX512_Cannonlake,
AVX512_KNL,
AVX512_SapphireRapids,
AVX512_Skylake,
AVX512_Zen4,
F16C,
FMA,
FMA4,
HVX_128,
HVX_128,
HVX_v62,
HVX_v65,
HVX_v66,
NoNEON,
POWER_ARCH_2_07,
RVV,
SSE41,
SVE,
SVE2,
VSX,
};
user_assert(!features_any_of(bad_features_wasm)) << "At least os_entry of the features for "
<< *this << " is incompatible with the Target's architecture.";
}
}

Target::Target(const std::string &target) {
Target host = get_host_target();

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6 changes: 6 additions & 0 deletions src/Target.h
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Original file line number Diff line number Diff line change
Expand Up @@ -178,6 +178,7 @@ struct Target {
for (const auto &f : initial_features) {
set_feature(f);
}
validate_features();
}

Target(OS o, Arch a, int b, const std::vector<Feature> &initial_features = std::vector<Feature>())
Expand Down Expand Up @@ -358,6 +359,11 @@ struct Target {
private:
/** A bitmask that stores the active features. */
std::bitset<FeatureEnd> features;

/** Attempt to validate that all features set are sensible for the base Target.
* This is *not* guaranteed to get all invalid combinations, but is intended
* to catch at least the most common (e.g., setting arm-specific features on x86). */
void validate_features() const;
};

/** Return the target corresponding to the host machine. */
Expand Down