================
@@ -3140,18 +3137,53 @@ void CodeGenFunction::EmitPPCAIXMultiVersionResolver(
assert(RO.Features.size() == 1 &&
"for now one feature requirement per version");
- assert(RO.Features[0].starts_with("cpu="));
- StringRef CPU = RO.Features[0].split("=").second.trim();
- StringRef Feature = llvm::StringSwitch<StringRef>(CPU)
- .Case("pwr7", "arch_2_06")
- .Case("pwr8", "arch_2_07")
- .Case("pwr9", "arch_3_00")
- .Case("pwr10", "arch_3_1")
- .Case("pwr11", "arch_3_1")
- .Default("error");
-
- llvm::Value *Condition = EmitPPCBuiltinCpu(
- Builtin::BI__builtin_cpu_supports, Builder.getInt1Ty(), Feature);
+ StringRef FeatureStr = RO.Features[0];
+ StringRef BuiltinCpuSupportsArg;
+ bool IsNegated = false;
+
+ if (FeatureStr.starts_with("cpu=")) {
+ // CPU specification - map to ISA level
+ StringRef CPU = FeatureStr.split("=").second.trim();
+ BuiltinCpuSupportsArg = llvm::StringSwitch<StringRef>(CPU)
+#define PPC_AIX_CLONES_CPU(CPU_NAME, AIX_BUILTIN_CPU_SUPPORTS_NAME, _) \
+ .Case(CPU_NAME, AIX_BUILTIN_CPU_SUPPORTS_NAME)
+#include "llvm/TargetParser/PPCTargetParser.def"
+ .Default("error");
+ } else {
+ // Feature strings arrive here already normalized:
+ // - Positive features: just the name (e.g., "altivec")
+ // - Negated features: "no-" prefix (e.g., "no-altivec")
+ if (FeatureStr.starts_with("no-")) {
+ IsNegated = true;
+ FeatureStr = FeatureStr.drop_front(3);
+ }
----------------
w2yehia wrote:
@diggerlin pointed out that this might cause a problem for this case:
```
__attribute__((target_clones("cpu=pwr10","no-altivec","default")))
int foo(void) { return 4; }
```
where we would test and select pwr10 version on a pwr10 system that has altivec
disabled.
https://github.com/llvm/llvm-project/pull/206786
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