[libclc] [libclc] Add contract flag to native_recip (PR #179406)

[Wenju He via cfe-commits]

https://github.com/wenju-he created https://github.com/llvm/llvm-project/pull/179406

This allows `sqrt(native_recip(x))` to fold to `rsqrt(x)` under -cl-fast-relaxed-math.

>From e9f30843d2427fb784215a5dca62f42ce60301a0 Mon Sep 17 00:00:00 2001
From: Wenju He <wenju.he at intel.com>
Date: Tue, 3 Feb 2026 08:27:25 +0100
Subject: [PATCH] [libclc] Add contract flag to native_recip

This allows `sqrt(native_recip(x))` to fold to `rsqrt(x)` under
-cl-fast-relaxed-math.
---
 libclc/clc/lib/generic/math/clc_native_recip.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libclc/clc/lib/generic/math/clc_native_recip.inc b/libclc/clc/lib/generic/math/clc_native_recip.inc
index e7246dc08a77c..4b878c2f39ab1 100644
--- a/libclc/clc/lib/generic/math/clc_native_recip.inc
+++ b/libclc/clc/lib/generic/math/clc_native_recip.inc
@@ -7,6 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_native_recip(__CLC_GENTYPE val) {
-  _Pragma("clang fp reciprocal(on)");
+#pragma clang fp reciprocal(on) contract(fast)
   return 1.0f / val;
 }