From 8765826465e6103d419808f78e8fc3f97218e9a6 Mon Sep 17 00:00:00 2001
From: Michael Matz <matz@suse.de>
Date: Tue, 2 Aug 2016 17:45:40 +0200
Subject: [PATCH] inline-asm: Accept "flags" clobber

---
 i386-asm.c      | 5 +++--
 tests/tcctest.c | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/i386-asm.c b/i386-asm.c
index 71c451a..b686665 100644
--- a/i386-asm.c
+++ b/i386-asm.c
@@ -347,7 +347,7 @@ static void parse_operand(TCCState *s1, Operand *op)
             goto no_skip;
         } else {
         reg_error:
-            tcc_error("unknown register");
+            tcc_error("unknown register %%%s", get_tok_str(tok, &tokc));
         }
         next();
     no_skip: ;
@@ -1487,7 +1487,8 @@ ST_FUNC void asm_clobber(uint8_t *clobber_regs, const char *str)
     TokenSym *ts;
 
     if (!strcmp(str, "memory") ||
-        !strcmp(str, "cc"))
+        !strcmp(str, "cc") ||
+	!strcmp(str, "flags"))
         return;
     ts = tok_alloc(str, strlen(str));
     reg = ts->tok;
diff --git a/tests/tcctest.c b/tests/tcctest.c
index 6218983..3885b54 100644
--- a/tests/tcctest.c
+++ b/tests/tcctest.c
@@ -2566,7 +2566,7 @@ static __inline__ void sigaddset1(unsigned int *set, int _sig)
 
 static __inline__ void sigdelset1(unsigned int *set, int _sig)
 {
-	asm("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
+	asm("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc", "flags");
 }
 
 static __inline__ __const__ unsigned int swab32(unsigned int x)