https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107103
Bug ID: 107103
Summary: '-fcompare-debug' failure w/ -mcpu=power4 -O1
-fschedule-insns -funroll-all-loops
-fno-sched-pressure --param max-sched-ready-insns=1
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: compare-debug-failure
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu
gcc 13.0.0 20220925 snapshot (g:77bbf69d2981dafc2ef3e59bfbefb645d88bab9d) fails
-fcompare-debug check when compiling the following testcase, reduced from
gcc/testsuite/g++.target/powerpc/pr65240-1.C, w/ -mcpu=power4 -O1
-fschedule-insns -funroll-all-loops -fno-sched-pressure --param
max-sched-ready-insns=1:
int *p;
int n;
int
bar (int);
void
foo (int x)
{
for (;;)
if (x)
p[n] = bar (x);
}
% powerpc-e300c3-linux-gnu-gcc-13.0.0 -mcpu=power4 -O1 -fcompare-debug
-fschedule-insns -funroll-all-loops -fno-sched-pressure --param
max-sched-ready-insns=1 -c ke3djyoc.c
powerpc-e300c3-linux-gnu-gcc-13.0.0: error: ke3djyoc.c: '-fcompare-debug'
failure
--- ke3djyoc.c.gkd 2022-09-30 23:33:02.202245982 +0700
+++ ke3djyoc.gk.c.gkd 2022-09-30 23:33:02.218245953 +0700
@@ -102,16 +102,16 @@
(code_label # 0 0 19 (nil) [8 uses])
(note # 0 0 [bb 3] NOTE_INSN_BASIC_BLOCK)
(note # 0 0 NOTE_INSN_DELETED)
+(insn # 0 0 (set (reg/f:SI 30 30 [orig:131 p ] [131])
+ (mem/f/c:SI (lo_sum:SI (reg/f:SI 27 27 [126])
+ (symbol_ref:SI ("p") [flags 0x86] <var_decl # p>)) [ p+0 S4
A32])) "ke3djyoc.c":12:8# {*movsi_internal1}
+ (nil))
(insn # 0 0 (set (reg:SI 31 31 [orig:130 n ] [130])
(mem/c:SI (lo_sum:SI (reg/f:SI 28 28 [128])
(symbol_ref:SI ("n") [flags 0x86] <var_decl # n>)) [ n+0 S4
A32])) "ke3djyoc.c":12:8# {*movsi_internal1}
(expr_list:REG_EQUIV (mem/c:SI (lo_sum:SI (reg/f:SI 28 28 [128])
(symbol_ref:SI ("n") [flags 0x86] <var_decl # n>)) [ n+0 S4
A32])
(nil)))
-(insn # 0 0 (set (reg/f:SI 30 30 [orig:131 p ] [131])
- (mem/f/c:SI (lo_sum:SI (reg/f:SI 27 27 [126])
- (symbol_ref:SI ("p") [flags 0x86] <var_decl # p>)) [ p+0 S4
A32])) "ke3djyoc.c":12:8# {*movsi_internal1}
- (nil))
(insn # 0 0 (set (reg:SI 3 3)
(reg/v:SI 29 29 [orig:123 x ] [123])) "ke3djyoc.c":12:14#
{*movsi_internal1}
(nil))
