exclude erf* libm intrinsics from hook table

Author: djdisodo

crates/rustc_codegen_spirv/src/builder/builder_methods.rs

@@ -2334,7 +2334,6 @@ impl<'a, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'tcx> {
                     self.debug_type(result.ty),
                 );
             }
-            result
         } else if [self.panic_fn_id.get(), self.panic_bounds_check_fn_id.get()]
             .contains(&Some(callee_val))
         {

crates/rustc_codegen_spirv/src/builder/libm_intrinsics.rs

@@ -70,10 +70,6 @@ pub const TABLE: &[(&str, LibmIntrinsic)] = &[
     ("cosf", LibmIntrinsic::GLOp(GLOp::Cos)),
     ("cosh", LibmIntrinsic::GLOp(GLOp::Cosh)),
     ("coshf", LibmIntrinsic::GLOp(GLOp::Cosh)),
-    ("erf", LibmIntrinsic::Custom(LibmCustomIntrinsic::Erf)),
-    ("erff", LibmIntrinsic::Custom(LibmCustomIntrinsic::Erf)),
-    ("erfc", LibmIntrinsic::Custom(LibmCustomIntrinsic::Erfc)),
-    ("erfcf", LibmIntrinsic::Custom(LibmCustomIntrinsic::Erfc)),
     ("exp10", LibmIntrinsic::Custom(LibmCustomIntrinsic::Exp10)),
     ("exp10f", LibmIntrinsic::Custom(LibmCustomIntrinsic::Exp10)),
     ("exp2", LibmIntrinsic::GLOp(GLOp::Exp2)),
@@ -258,16 +254,6 @@ impl Builder<'_, '_> {
                 let one = self.constant_float(exp.ty, 1.0);
                 self.sub(exp, one)
             }
-            LibmIntrinsic::Custom(LibmCustomIntrinsic::Erf) => {
-                let undef = self.undef(result_type);
-                self.zombie(undef.def(self), "Erf not supported yet");
-                undef
-            }
-            LibmIntrinsic::Custom(LibmCustomIntrinsic::Erfc) => {
-                let undef = self.undef(result_type);
-                self.zombie(undef.def(self), "Erfc not supported yet");
-                undef
-            }
             LibmIntrinsic::Custom(LibmCustomIntrinsic::Fdim) => {
                 let undef = self.undef(result_type);
                 self.zombie(undef.def(self), "Fdim not supported yet");
@@ -348,6 +334,9 @@ impl Builder<'_, '_> {
                 self.zombie(undef.def(self), "Scalbn not supported yet");
                 undef
             }
+            _ => {
+                panic!("unexpected behavior, please open an issue")
+            }
         }
     }
 }