[llvm] [CodeGen] Merge lowerConstantIntrinsics into pre-isel lowering (PR #97727)

[Alexis Engelke via llvm-commits]

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@@ -285,6 +311,16 @@ bool PreISelIntrinsicLowering::lowerIntrinsics(Module &M) const {
     case Intrinsic::load_relative:
       Changed |= lowerLoadRelative(F);
       break;
+    case Intrinsic::is_constant:
+    case Intrinsic::objectsize:
+      Changed |= forEachCall(F, [&](CallInst *CI) {
+        Function *Parent = CI->getParent()->getParent();
+        TargetLibraryInfo &TLI = LookupTLI(*Parent);
+        bool Changed = lowerConstantIntrinsics(*Parent, TLI, /*DT=*/nullptr);
+        assert(Changed && "lowerConstantIntrinsics did not lower intrinsic");
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aengelke wrote:

Good catch! Opened #102442 to remove the assertion and add a test case.

https://github.com/llvm/llvm-project/pull/97727