[clang] [llvm] [FMV][AArch64] Allow user to override version priority. (PR #150267)

[Alexandros Lamprineas via llvm-commits]

================
@@ -348,6 +350,76 @@ entry:
   ret i32 %call
 }
 
+declare i32 @test_explicit_priority._Mmops() #18
+declare i32 @test_explicit_priority._Msve2() #19
+declare i32 @test_explicit_priority._Msve() #20
+declare i32 @test_explicit_priority.default() #0
+
+define weak_odr ptr @test_explicit_priority.resolver() comdat {
+; CHECK-LABEL: define weak_odr ptr @test_explicit_priority.resolver() comdat {
+resolver_entry:
+  tail call void @__init_cpu_features_resolver()
+  %0 = load i64, ptr @__aarch64_cpu_features, align 8
+  %1 = and i64 %0, 1073807616
+  %2 = icmp eq i64 %1, 1073807616
+  br i1 %2, label %common.ret, label %resolver_else
+
+common.ret:                                       ; preds = %resolver_else2, %resolver_else, %resolver_entry
+  %common.ret.op = phi ptr [ @test_explicit_priority._Msve, %resolver_entry ], [ @test_explicit_priority._Msve2, %resolver_else ], [ %test_explicit_priority._Mmops.test_explicit_priority.default, %resolver_else2 ]
+  ret ptr %common.ret.op
+
+resolver_else:                                    ; preds = %resolver_entry
+  %3 = and i64 %0, 69793284352
+  %4 = icmp eq i64 %3, 69793284352
+  br i1 %4, label %common.ret, label %resolver_else2
+
+resolver_else2:                                   ; preds = %resolver_else
+  %5 = and i64 %0, 576460752303423488
+  %.not = icmp eq i64 %5, 0
+  %test_explicit_priority._Mmops.test_explicit_priority.default = select i1 %.not, ptr @test_explicit_priority.default, ptr @test_explicit_priority._Mmops
+  br label %common.ret
+}
+
+define i32 @caller8._MmopsMsve2() #21 {
+; CHECK-LABEL: define i32 @caller8._MmopsMsve2(
+; CHECK-SAME: ) local_unnamed_addr #[[ATTR20:[0-9]+]] {
+; CHECK:    [[CALL:%.*]] = tail call i32 @test_explicit_priority._Msve2()
+;
+entry:
+  %call = tail call i32 @test_explicit_priority()
+  ret i32 %call
+}
+
+define i32 @caller8._Mmops() #22 {
+; CHECK-LABEL: define i32 @caller8._Mmops(
+; CHECK-SAME: ) local_unnamed_addr #[[ATTR21:[0-9]+]] {
+; CHECK:    [[CALL:%.*]] = tail call i32 @test_explicit_priority()
+;
+entry:
+  %call = tail call i32 @test_explicit_priority()
+  ret i32 %call
+}
+
+define i32 @caller8._Msve() #23 {
+; CHECK-LABEL: define i32 @caller8._Msve(
+; CHECK-SAME: ) local_unnamed_addr #[[ATTR22:[0-9]+]] {
+; CHECK:    [[CALL:%.*]] = tail call i32 @test_explicit_priority._Msve()
+;
+entry:
+  %call = tail call i32 @test_explicit_priority()
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labrinea wrote:

I've raised https://github.com/llvm/llvm-project/pull/160011 to address the said issues.

https://github.com/llvm/llvm-project/pull/150267