[llvm-branch-commits] [llvm] release/19.x: [NFC][llvm][support] rename INFINITY in regcomp (#101758) (PR #102492)

[Tobias Hieta via llvm-branch-commits]

https://github.com/tru updated https://github.com/llvm/llvm-project/pull/102492

>From 32e20009d1943e2f6cd6f55c6ec6a23dcd094337 Mon Sep 17 00:00:00 2001
From: David Tenty <daltenty at ibm.com>
Date: Thu, 8 Aug 2024 11:16:18 -0400
Subject: [PATCH] [NFC][llvm][support] rename INFINITY in regcomp (#101758)

since C23 this macro is defined by float.h, which clang implements in
it's float.h since #96659 landed.

However, regcomp.c in LLVMSupport happened to define it's own macro with
that name, leading to problems when bootstrapping. This change renames
the offending macro.

(cherry picked from commit 899f648866affd011baae627752ba15baabc2ef9)
---
 llvm/lib/Support/regcomp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Support/regcomp.c b/llvm/lib/Support/regcomp.c
index 990aef32a396fa..daa41eb4912ef4 100644
--- a/llvm/lib/Support/regcomp.c
+++ b/llvm/lib/Support/regcomp.c
@@ -278,7 +278,7 @@ static char nuls[10];		/* place to point scanner in event of error */
 #else
 #define	DUPMAX	255
 #endif
-#define	INFINITY	(DUPMAX + 1)
+#define REGINFINITY (DUPMAX + 1)
 
 #ifndef NDEBUG
 static int never = 0;		/* for use in asserts; shuts lint up */
@@ -582,7 +582,7 @@ p_ere_exp(struct parse *p)
 				count2 = p_count(p);
 				REQUIRE(count <= count2, REG_BADBR);
 			} else		/* single number with comma */
-				count2 = INFINITY;
+				count2 = REGINFINITY;
 		} else		/* just a single number */
 			count2 = count;
 		repeat(p, pos, count, count2);
@@ -753,7 +753,7 @@ p_simp_re(struct parse *p,
 				count2 = p_count(p);
 				REQUIRE(count <= count2, REG_BADBR);
 			} else		/* single number with comma */
-				count2 = INFINITY;
+				count2 = REGINFINITY;
 		} else		/* just a single number */
 			count2 = count;
 		repeat(p, pos, count, count2);
@@ -1115,7 +1115,7 @@ repeat(struct parse *p,
 #	define	N	2
 #	define	INF	3
 #	define	REP(f, t)	((f)*8 + (t))
-#	define	MAP(n)	(((n) <= 1) ? (n) : ((n) == INFINITY) ? INF : N)
+#	define	MAP(n)	(((n) <= 1) ? (n) : ((n) == REGINFINITY) ? INF : N)
 	sopno copy;
 
 	if (p->error != 0)	/* head off possible runaway recursion */