https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111362
Bug ID: 111362
Summary: [14 Regression] '-fcompare-debug' failure (length)
with -O -fno-tree-ch
--param=max-completely-peel-times=0 -march=rv64iv
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: compare-debug-failure
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: riscv64-unknown-linux-gnu
Created attachment 55871
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55871&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O -fno-tree-ch
--param=max-completely-peel-times=0 -march=rv64iv -fcompare-debug testcase.c
-save-temps
riscv64-unknown-linux-gnu-gcc: error: testcase.c: '-fcompare-debug' failure
(length)
$ diff -u *gkd
--- a-testcase.c.gkd 2023-09-10 13:14:46.728418677 +0200
+++ a-testcase.gk.c.gkd 2023-09-10 13:14:46.781751718 +0200
@@ -34,17 +34,7 @@
(const_int 8 [0x8])) [ S8 A64])
(reg:DI 9 s1))
(nil))))
-(insn/f # 0 0 (set (mem/c:DI (reg/f:DI 2 sp) [ S8 A64])
- (reg:DI 18 s2)) "testcase.c":2:11# {*movdi_64bit}
- (expr_list:REG_DEAD (reg:DI 18 s2)
- (expr_list:REG_FRAME_RELATED_EXPR (set/f (mem/c:DI (reg/f:DI 2 sp) [
S8 A64])
- (reg:DI 18 s2))
- (nil))))
(note # 0 0 NOTE_INSN_PROLOGUE_END)
-(insn # 0 0 (set (reg:SI 18 s2 [139])
- (reg:SI 69 frm))# {frrmsi}
- (expr_list:REG_DEAD (reg:SI 69 frm)
- (nil)))
(note # 0 0 NOTE_INSN_FUNCTION_BEG)
(insn # 0 0 (set (reg:DI 8 s0 [orig:134 ivtmp_6 ] [134])
(const_int 2 [0x2])) "testcase.c":3:3# {*movdi_64bit}
@@ -85,10 +75,6 @@
(const_int 8 [0x8])) [ S8 A64])) "testcase.c":5:1#
{*movdi_64bit}
(expr_list:REG_CFA_RESTORE (reg:DI 9 s1)
(nil)))
-(insn/f # 0 0 (set (reg:DI 18 s2)
- (mem/c:DI (reg/f:DI 2 sp) [ S8 A64])) "testcase.c":5:1#
{*movdi_64bit}
- (expr_list:REG_CFA_RESTORE (reg:DI 18 s2)
- (nil)))
(insn # 0 0 (set (mem:BLK (scratch) [ A8])
(unspec:BLK [
(reg/f:DI 2 sp)
@@ -118,12 +104,6 @@
(symbol_ref/f:DI ("*.LC0") [flags 0x82] <var_decl # *.LC0>)))
"testcase.c":4:5# {*lowdi}
(expr_list:REG_EQUAL (symbol_ref/f:DI ("*.LC0") [flags 0x82] <var_decl #
*.LC0>)
(nil)))
-(insn # 0 0 (set (reg:SI 69 frm)
- (unspec_volatile:SI [
- (reg:SI 18 s2 [139])
- ] UNSPECV_FRM_RESTORE_EXIT)) "testcase.c":4:5#
{fsrmsi_restore_volatile}
- (expr_list:REG_UNUSED (reg:SI 69 frm)
- (nil)))
(call_insn # 0 0 (parallel [
(set (reg:DI 10 a0)
(call (mem:SI (symbol_ref:DI ("printf") [flags 0x41]
<function_decl # __builtin_printf>) [ __builtin_printf S4 A32])
$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-3825-20230910101237-g0d50facd937-checking-yes-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/14.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,df,extra
--with-cloog --with-ppl --with-isl --with-isa-spec=2.2
--with-sysroot=/usr/riscv64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-3825-20230910101237-g0d50facd937-checking-yes-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20230910 (experimental) (GCC)
