Implemented is_val_statically_known in rustc_codegen_gcc

rust-lang · Jan 18, 2024 · 7f35252 · 7f35252
1 parent 61faffb
commit 7f35252
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/compiler/rustc_codegen_gcc/src/context.rs b/compiler/rustc_codegen_gcc/src/context.rs
@@ -196,15 +196,16 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
 
  let mut functions = FxHashMap::default();
  let builtins = [
- "__builtin_unreachable", "abort", "__builtin_expect", "__builtin_add_overflow", "__builtin_mul_overflow",
- "__builtin_saddll_overflow", /*"__builtin_sadd_overflow",*/ "__builtin_smulll_overflow", /*"__builtin_smul_overflow",*/
+ "__builtin_unreachable", "abort", "__builtin_expect", /*"__builtin_expect_with_probability",*/
+ "__builtin_constant_p", "__builtin_add_overflow", "__builtin_mul_overflow", "__builtin_saddll_overflow",
+ /*"__builtin_sadd_overflow",*/ "__builtin_smulll_overflow", /*"__builtin_smul_overflow",*/
  "__builtin_ssubll_overflow", /*"__builtin_ssub_overflow",*/ "__builtin_sub_overflow", "__builtin_uaddll_overflow",
  "__builtin_uadd_overflow", "__builtin_umulll_overflow", "__builtin_umul_overflow", "__builtin_usubll_overflow",
  "__builtin_usub_overflow", "sqrtf", "sqrt", "__builtin_powif", "__builtin_powi", "sinf", "sin", "cosf", "cos",
  "powf", "pow", "expf", "exp", "exp2f", "exp2", "logf", "log", "log10f", "log10", "log2f", "log2", "fmaf",
  "fma", "fabsf", "fabs", "fminf", "fmin", "fmaxf", "fmax", "copysignf", "copysign", "floorf", "floor", "ceilf",
  "ceil", "truncf", "trunc", "rintf", "rint", "nearbyintf", "nearbyint", "roundf", "round",
-  "__builtin_expect_with_probability",
+
  ];
 
  for builtin in builtins.iter() {

diff --git 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,