* [pushed] read-rtl: Fix infinite loop while parsing [...]
@ 2023-11-05 18:27 Richard Sandiford
0 siblings, 0 replies; only message in thread
From: Richard Sandiford @ 2023-11-05 18:27 UTC (permalink / raw)
To: gcc-patches
read_rtx_operand would spin endlessly for:
(unspec [(...))] UNSPEC_FOO)
because read_nested_rtx does nothing if the next character is not '('.
Pushed after testing on aarch64-linux-gnu & x86_&4-linux-gnu.
Richard
gcc/
* read-rtl.cc (read_rtx_operand): Avoid spinning endlessly for
invalid [...] operands.
---
gcc/read-rtl.cc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/read-rtl.cc b/gcc/read-rtl.cc
index 292f8b72d43..f3b5613dfdb 100644
--- a/gcc/read-rtl.cc
+++ b/gcc/read-rtl.cc
@@ -1896,8 +1896,10 @@ rtx_reader::read_rtx_operand (rtx return_rtx, int idx)
repeat_count--;
value = saved_rtx;
}
- else
+ else if (c == '(')
value = read_nested_rtx ();
+ else
+ fatal_with_file_and_line ("unexpected character in vector");
for (; repeat_count > 0; repeat_count--)
{
--
2.25.1
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