diff options
Diffstat (limited to 'gcc/ada/checks.adb')
| -rw-r--r-- | gcc/ada/checks.adb | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/gcc/ada/checks.adb b/gcc/ada/checks.adb index 05ec983dee7..b5086cc38d3 100644 --- a/gcc/ada/checks.adb +++ b/gcc/ada/checks.adb @@ -2878,11 +2878,35 @@ package body Checks is -- Always do a range check if the source type includes infinities and -- the target type does not include infinities. We do not do this if -- range checks are killed. + -- If the expression is a literal and the bounds of the type are + -- static constants it may be possible to optimize the check. if Has_Infinities (S_Typ) and then not Has_Infinities (Target_Typ) then - Enable_Range_Check (Expr); + -- If the expression is a literal and the bounds of the type are + -- static constants it may be possible to optimize the check. + + if Nkind (Expr) = N_Real_Literal then + declare + Tlo : constant Node_Id := Type_Low_Bound (Target_Typ); + Thi : constant Node_Id := Type_High_Bound (Target_Typ); + + begin + if Compile_Time_Known_Value (Tlo) + and then Compile_Time_Known_Value (Thi) + and then Expr_Value_R (Expr) >= Expr_Value_R (Tlo) + and then Expr_Value_R (Expr) <= Expr_Value_R (Thi) + then + return; + else + Enable_Range_Check (Expr); + end if; + end; + + else + Enable_Range_Check (Expr); + end if; end if; end if; |