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BLI_noise: suppress signed int overflow warnings for hash_pcg2d_*

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Ref !144986
This commit is contained in:
Campbell Barton
2025-08-22 14:33:24 +00:00
parent 40e876ab37
commit 420d45ceb4
1 changed files with 16 additions and 0 deletions
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16
source/blender/blenlib/intern/noise.cc
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@@ -21,6 +21,19 @@
#include "BLI_noise.hh"
#include "BLI_utildefines.h"
/* Some noise functions integer overflow as part of expected operation. */
#ifdef __SANITIZE_ADDRESS__
/* CLANG also supports GNU extensions. */
# if defined(__GNUC__) || defined(__clang__)
# define ATTR_NO_SIGNED_INT_OVERFLOW [[gnu::no_sanitize("signed-integer-overflow")]]
# else
/* TODO: MSVC, others as needed. */
# define ATTR_NO_SIGNED_INT_OVERFLOW
# endif
#else
# define ATTR_NO_SIGNED_INT_OVERFLOW
#endif
namespace blender::noise {
/* -------------------------------------------------------------------- */
@@ -143,6 +156,7 @@ BLI_INLINE uint32_t float_as_uint(float f)
* Slightly modified to only use signed integers,
* so that they can also be implemented in OSL. */
ATTR_NO_SIGNED_INT_OVERFLOW
static inline int2 hash_pcg2d_i(int2 v)
{
v = v * int2(1664525) + int2(1013904223);
@@ -154,6 +168,7 @@ static inline int2 hash_pcg2d_i(int2 v)
return v;
}
ATTR_NO_SIGNED_INT_OVERFLOW
static inline int3 hash_pcg3d_i(int3 v)
{
v = v * int3(1664525) + int3(1013904223);
@@ -167,6 +182,7 @@ static inline int3 hash_pcg3d_i(int3 v)
return v;
}
ATTR_NO_SIGNED_INT_OVERFLOW
static inline int4 hash_pcg4d_i(int4 v)
{
v = v * int4(1664525) + int4(1013904223);