[clang] [CIR] Upstream support for promoted types with unary plus/minus (PR #133829)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -405,3 +405,45 @@ float fpPostInc2() {
 // OGCG:   store float %[[A_INC]], ptr %[[A]], align 4
 // OGCG:   store float %[[A_LOAD]], ptr %[[B]], align 4
 // OGCG:   %[[B_TO_OUTPUT:.*]] = load float, ptr %[[B]], align 4
+
+_Float16 fp16UPlus(_Float16 f) {
+  return +f;
+}
+
+// CHECK: cir.func @fp16UPlus({{.*}}) -> !cir.f16
+// CHECK:   %[[INPUT:.*]] = cir.load %[[F:.*]]
+// CHECK:   %[[PROMOTED:.*]] = cir.cast(floating, %[[INPUT]] : !cir.f16), !cir.float
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bcardosolopes wrote:

> When you say, "land the direct version first," do you mean proceed with this PR as is? That seems reasonable to me. I just wanted to make sure we're all in agreement.

Yes!

https://github.com/llvm/llvm-project/pull/133829