[clang] [CIR] Upstream missing support for floating point unary operator (PR #193215)

[Sirui Mu via cfe-commits]

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@@ -222,6 +222,24 @@ int inc2() {
 // OGCG:   store i32 %[[A_LOAD]], ptr %[[B]], align 4
 // OGCG:   %[[B_TO_OUTPUT:.*]] = load i32, ptr %[[B]], align 4
 
+void chars(char c) {
+// CHECK: cir.func{{.*}} @_Z5charsc
+
+  int c1 = +c;
+  // CHECK: %[[PROMO:.*]] = cir.cast integral %{{.+}} : !s8i -> !s32i
+  int c2 = -c;
+  // CHECK: %[[PROMO:.*]] = cir.cast integral %{{.+}} : !s8i -> !s32i
+  // CHECK: cir.minus nsw %[[PROMO]] : !s32i
+
+  // Chars can go through some integer promotion codegen paths even when not promoted.
+  // These should not have nsw attributes because the intermediate promotion makes the
+  // overflow defined behavior.
+  ++c; // CHECK: cir.inc %{{.+}} : !s8i
+  --c; // CHECK: cir.dec %{{.+}} : !s8i
+  c++; // CHECK: cir.inc %{{.+}} : !s8i
+  c--; // CHECK: cir.dec %{{.+}} : !s8i
+}
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Lancern wrote:

Is this test related to the patch?

https://github.com/llvm/llvm-project/pull/193215