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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/103808] New: [12 Regression] '-fcompare-debug' failure (length) w/ -O2 -ftrapv
Date: Wed, 22 Dec 2021 17:08:06 +0000 [thread overview]
Message-ID: <bug-103808-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103808
Bug ID: 103808
Summary: [12 Regression] '-fcompare-debug' failure (length) w/
-O2 -ftrapv
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc 12.0.0 20211219 snapshot (g:fcbf94a5be9e0c1ecad92da773a6632b86b7f70a) fails
-fcompare-debug check when compiling the following testcase w/ -O2 -ftrapv:
void
foo (__int128 x, int y)
{
for (;;)
{
__int128 a, b;
x |= !!y;
a = x + 1;
b = y ? ++y : ++x;
y = a < b;
if (x >> 2)
y *= 2;
if (y == b)
__builtin_unreachable ();
}
}
% x86_64-unknown-linux-gnu-gcc-12.0.0 -O2 -fcompare-debug -ftrapv -c ddz9adk2.c
x86_64-unknown-linux-gnu-gcc-12.0.0: error: ddz9adk2.c: '-fcompare-debug'
failure (length)
--- ddz9adk2.c.gkd 2021-12-23 00:04:28.297518259 +0700
+++ ddz9adk2.gk.c.gkd 2021-12-23 00:04:28.387512439 +0700
@@ -6,11 +6,11 @@
(note # 0 0 [bb 2] NOTE_INSN_BASIC_BLOCK)
(note # 0 0 NOTE_INSN_DELETED)
(note # 0 0 NOTE_INSN_DELETED)
-(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [ S8 A8])
+(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp [ x+8 ])) [ S8
A8])
(reg:DI 42 r14)) "ddz9adk2.c":3:1# {*pushdi2_rex64}
(expr_list:REG_DEAD (reg:DI 42 r14)
(nil)))
-(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [ S8 A8])
+(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp [ x+8 ])) [ S8
A8])
(reg:DI 41 r13)) "ddz9adk2.c":3:1# {*pushdi2_rex64}
(expr_list:REG_DEAD (reg:DI 41 r13)
(nil)))
@@ -18,7 +18,7 @@
(reg:DI 4 si [123])) "ddz9adk2.c":3:1# {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 4 si [123])
(nil)))
-(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [ S8 A8])
+(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp [ x+8 ])) [ S8
A8])
(reg:DI 40 r12)) "ddz9adk2.c":3:1# {*pushdi2_rex64}
(expr_list:REG_DEAD (reg:DI 40 r12)
(nil)))
@@ -26,11 +26,11 @@
(reg:DI 5 di [122])) "ddz9adk2.c":3:1# {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 5 di [122])
(nil)))
-(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [ S8 A8])
+(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp [ x+8 ])) [ S8
A8])
(reg:DI 6 bp)) "ddz9adk2.c":3:1# {*pushdi2_rex64}
(expr_list:REG_DEAD (reg:DI 6 bp)
(nil)))
-(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [ S8 A8])
+(insn/f:TI # 0 0 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp [ x+8 ])) [ S8
A8])
(reg:DI 3 bx)) "ddz9adk2.c":3:1# {*pushdi2_rex64}
(expr_list:REG_DEAD (reg:DI 3 bx)
(nil)))
next reply other threads:[~2021-12-22 17:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 17:08 asolokha at gmx dot com [this message]
2021-12-22 21:18 ` [Bug middle-end/103808] " pinskia at gcc dot gnu.org
2021-12-22 23:34 ` [Bug target/103808] " pinskia at gcc dot gnu.org
2021-12-22 23:36 ` pinskia at gcc dot gnu.org
2021-12-22 23:57 ` pinskia at gcc dot gnu.org
2021-12-23 8:32 ` [Bug target/103808] [12 Regression] '-fcompare-debug' failure (length) w/ -O2 -ftrapv since r12-5944-ga7acb6dca941db2b marxin at gcc dot gnu.org
2021-12-28 18:37 ` jakub at gcc dot gnu.org
2021-12-30 13:36 ` [Bug debug/103808] " cvs-commit at gcc dot gnu.org
2021-12-30 13:40 ` jakub at gcc dot gnu.org
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