[clang] [CIR][AMDGPU] Adds amdgcn logb and scalebn builtins (PR #191344)

[Andy Kaylor via cfe-commits]

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@@ -18,6 +18,90 @@
 
 using namespace clang;
 using namespace clang::CIRGen;
+using namespace cir;
+
+static mlir::Value emitBinaryExpMaybeConstrainedFPBuiltin(
+    CIRGenFunction &CGF, const CallExpr *E, llvm::StringRef IntrinsicName,
+    llvm::StringRef ConstrainedIntrinsicName) {
+  mlir::Value Src0 = CGF.emitScalarExpr(E->getArg(0));
+  mlir::Value Src1 = CGF.emitScalarExpr(E->getArg(1));
+
+  auto &Builder = CGF.getBuilder();
+
+  CIRGenFunction::CIRGenFPOptionsRAII FPOptsRAII(CGF, E);
+
+  if (Builder.getIsFPConstrained()) {
+    return cir::LLVMIntrinsicCallOp::create(
+               Builder, CGF.getLoc(E->getExprLoc()),
+               Builder.getStringAttr(ConstrainedIntrinsicName), Src0.getType(),
+               {Src0, Src1})
+        .getResult();
+  }
+
+  return cir::LLVMIntrinsicCallOp::create(Builder, CGF.getLoc(E->getExprLoc()),
+                                          Builder.getStringAttr(IntrinsicName),
+                                          Src0.getType(), {Src0, Src1})
+      .getResult();
+}
+
+static mlir::Value emitLogbBuiltin(CIRGenFunction &CGF, const CallExpr *E,
+                                   bool IsFloat) {
+  auto &Builder = CGF.getBuilder();
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andykaylor wrote:

Don't use `auto` here. One way CIR doesn't follow MLIR style is in the aggressive use of `auto`.

https://github.com/llvm/llvm-project/pull/191344