[PATCH] D137809: [LoongArch] Add immediate operand validity check for __builtin_loongarch_dbar

[Gong LingQin via Phabricator via cfe-commits]

gonglingqin created this revision.
gonglingqin added reviewers: xen0n, xry111, SixWeining, wangleiat, MaskRay.
Herald added a subscriber: StephenFan.
Herald added a project: All.
gonglingqin requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137809

Files:
  clang/lib/Sema/SemaChecking.cpp
  clang/test/CodeGen/LoongArch/intrinsic-error.c


Index: clang/test/CodeGen/LoongArch/intrinsic-error.c
===================================================================
--- clang/test/CodeGen/LoongArch/intrinsic-error.c
+++ clang/test/CodeGen/LoongArch/intrinsic-error.c
@@ -6,3 +6,7 @@
 int crc_w_d_w(long int a, int b) {
   return __builtin_loongarch_crc_w_d_w(a, b); // expected-error {{this builtin requires target: loongarch64}}
 }
+
+void dbar() {
+  return __builtin_loongarch_dbar(32768); // expected-error {{argument value 32768 is outside the valid range [0, 32767]}}
+}
Index: clang/lib/Sema/SemaChecking.cpp
===================================================================
--- clang/lib/Sema/SemaChecking.cpp
+++ clang/lib/Sema/SemaChecking.cpp
@@ -3683,6 +3683,9 @@
                   diag::err_loongarch_builtin_requires_la64)
              << TheCall->getSourceRange();
     break;
+  case LoongArch::BI__builtin_loongarch_dbar:
+    // Check if immediate is in [0, 32767]
+    return SemaBuiltinConstantArgRange(TheCall, 0, 0, 32767);
   }
 
   return false;


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