Bootstrap and regtest running on s390x-redhat-linux.
"r264537: Change EQ_ATTR_ALT to support up to 64 alternatives" changed
the format of EQ_ATTR_ALT from ii to ww. This broke the bootstrap on
32-bit systems, because the formula for rtx_code_size assumed that only
certain codes contain HOST_WIDE_INTs. This did not surface on 64-bit
systems, because rtunion is 8 bytes anyway, but on 32-bit systems it's
only 4 bytes. This resulted in out-of-bounds writes and memory
corruptions in genattrtab.
gcc/ChangeLog:
2018-09-24 Ilya Leoshkevich <i...@linux.ibm.com>
PR bootstrap/87417
* rtl.c (rtx_code_size): Take into account that EQ_ATTR_ALT
contains HOST_WIDE_INTs when computing its size.
---
gcc/rtl.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/gcc/rtl.c b/gcc/rtl.c
index f9146afcf2c..ca5c25c422f 100644
--- a/gcc/rtl.c
+++ b/gcc/rtl.c
@@ -110,8 +110,7 @@ const enum rtx_class rtx_class[NUM_RTX_CODE] = {
const unsigned char rtx_code_size[NUM_RTX_CODE] = {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)
\
- (((ENUM) == CONST_INT || (ENUM) == CONST_DOUBLE \
- || (ENUM) == CONST_FIXED || (ENUM) == CONST_WIDE_INT) \
+ ((FORMAT)[0] == 'w' \
? RTX_HDR_SIZE + (sizeof FORMAT - 1) * sizeof (HOST_WIDE_INT) \
: (ENUM) == REG \
? RTX_HDR_SIZE + sizeof (reg_info) \
--
2.19.0
