mirror/gcc
1
0
Fork 0
mirror of https://github.com/gcc-mirror/gcc.git synced 2024-11-21 13:40:47 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

c: Fix ICE for integer constexpr initializers of wrong type [PR115515]

Browse Source 
Bug 115515 (plus its duplicate 117139) reports an ICE with constexpr
initializer for an integer type variable that is not of integer type.
Fix this by not calling int_fits_type_p unless the previous check for
an integer constant expression passes.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

	PR c/115515

gcc/c/
	* c-typeck.cc (check_constexpr_init): Do not call int_fits_type_p
	for arguments that are not integer constant expressions.

gcc/testsuite/
	* gcc.dg/c23-constexpr-10.c, gcc.dg/gnu23-constexpr-2.c: New
	tests.
This commit is contained in:
Joseph Myers 2024-11-20 01:37:30 +00:00
parent 357708c653
commit 5afc98fec9
3 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
gcc/c/c-typeck.cc
View File

@ -8936,7 +8936,7 @@ check_constexpr_init (location_t loc, tree type, tree init,
if (!int_const_expr) if (!int_const_expr)
error_at (loc, "%<constexpr%> integer initializer is not an " error_at (loc, "%<constexpr%> integer initializer is not an "
"integer constant expression"); "integer constant expression");
if (!int_fits_type_p (init, type)) else if (!int_fits_type_p (init, type))
error_at (loc, "%<constexpr%> initializer not representable in " error_at (loc, "%<constexpr%> initializer not representable in "
"type of object"); "type of object");
return; return;

13
gcc/testsuite/gcc.dg/c23-constexpr-10.c Normal file
View File

@ -0,0 +1,13 @@
/* Test C23 constexpr. Invalid types of integer initializers (bug 115515). */
/* { dg-do compile } */
/* { dg-options "-std=c23 -pedantic-errors" } */
struct s { float x; };
const struct s i = { 3.1 };
constexpr int j = i.x; /* { dg-error "constexpr' integer initializer is not an integer constant expression" } */
constexpr struct s i2 = { 3.25f };
constexpr int j2 = i2.x; /* { dg-error "constexpr' integer initializer is not an integer constant expression" } */
constexpr int j3 = 2 * 2.5; /* { dg-error "constexpr' integer initializer is not an integer constant expression" } */
constexpr int j4 = 5.0; /* { dg-error "constexpr' integer initializer is not an integer constant expression" } */

5
gcc/testsuite/gcc.dg/gnu23-constexpr-2.c Normal file
View File

@ -0,0 +1,5 @@
/* Test C23 constexpr. Invalid types of integer initializers (bug 115515). */
/* { dg-do compile } */
/* { dg-options "-std=gnu23" } */
constexpr int i = 5i; /* { dg-error "constexpr' integer initializer is not an integer constant expression" } */