From 2eac3da184459607a476ebb5dcebd6e0acf9fefa Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Tue, 6 Nov 2018 13:23:20 +1030
Subject: [PATCH] PowerPC instruction operand flag validation
This adds another check that might have saved me a little time
recently if it had been present.
* config/tc-ppc.c (insn_validate): Check that optional operands
are not followed by non-optional operands.
---
gas/ChangeLog | 5 +++++
gas/config/tc-ppc.c | 9 +++++++++
2 files changed, 14 insertions(+)
diff --git a/gas/ChangeLog b/gas/ChangeLog
index ffff8210d78..2773d92ba07 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2018-11-06 Alan Modra <amodra@gmail.com>
+
+ * config/tc-ppc.c (insn_validate): Check that optional operands
+ are not followed by non-optional operands.
+
2018-11-06 Jan Beulich <jbeulich@suse.com>
* testsuite/gas/i386/evex-wig.s: Add vpbroadcastd cases.
diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index d587a50ca7b..694c47ad1ff 100644
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -1514,6 +1514,7 @@ insn_validate (const struct powerpc_opcode *op)
/* The operands must not overlap the opcode or each other. */
for (o = op->operands; *o; ++o)
{
+ bfd_boolean optional = FALSE;
if (*o >= num_powerpc_operands)
{
as_bad (_("operand index error for %s"), op->name);
@@ -1538,6 +1539,14 @@ insn_validate (const struct powerpc_opcode *op)
}
omask |= mask;
}
+ if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
+ optional = TRUE;
+ else if (optional)
+ {
+ as_bad (_("non-optional operand %d follows optional operand in %s"),
+ (int) (o - op->operands), op->name);
+ return TRUE;
+ }
}
}
return FALSE;