Further Implement `is_val_statically_known`

1 files changed, 6 insertions, 0 deletions

diff --git a/compiler/rustc_codegen_gcc/src/intrinsic/mod.rs b/compiler/rustc_codegen_gcc/src/intrinsic/mod.rs
index 85b891fce3e..eac8cb43779 100644
--- a/compiler/rustc_codegen_gcc/src/intrinsic/mod.rs
+++ b/compiler/rustc_codegen_gcc/src/intrinsic/mod.rs
@@ -123,6 +123,12 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
                 sym::unlikely => {
                     self.expect(args[0].immediate(), false)
                 }
+                sym::is_val_statically_known => {
+                    let a = args[0].immediate();
+                    let builtin = self.context.get_builtin_function("__builtin_constant_p");
+                    let res = self.context.new_call(None, builtin, &[a]);
+                    self.icmp(IntPredicate::IntEQ, res, self.const_i32(0))
+                }
                 kw::Try => {
                     try_intrinsic(
                         self,