https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126126
Bug ID: 126126
Summary: [SH] Bootstrap comparison failure! - gcc/ipa-cp.o
differs
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at debian dot org
CC: olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Created attachment 64947
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64947&action=edit
Diff of disassembly of stage2/stage3 versions of gcc/ipa-cp.o on sh4
Performing a native bootstrap build on Debian unstable sh4 on revision
f50679ec5db fails during the stage2/stage3 comparision:
make[2]: Entering directory '/home/glaubitz/gcc/build'
make[3]: Entering directory '/home/glaubitz/gcc/build'
rm -f stage_current
make[3]: Leaving directory '/home/glaubitz/gcc/build'
Comparing stages 2 and 3
Bootstrap comparison failure!
gcc/ipa-cp.o differs
make[2]: *** [Makefile:27202: compare] Error 1
make[2]: Leaving directory '/home/glaubitz/gcc/build'
make[1]: *** [Makefile:27182: stage3-bubble] Error 2
make[1]: Leaving directory '/home/glaubitz/gcc/build'
make: *** [Makefile:1139: all] Error 2
Disassembling gcc/ipa-cp.o from both stage2 and stage3 and then diffing the
result yields:
--- ipa-cp-stage2.diff 2026-07-05 20:27:50.272519255 +0200
+++ ipa-cp-stage3.diff 2026-07-05 20:27:56.584519312 +0200
@@ -1,5 +1,5 @@
-./stage2-gcc/ipa-cp.o: file format elf32-sh-linux
+./stage3-gcc/ipa-cp.o: file format elf32-sh-linux
Disassembly of section .text:
@@ -51424,7 +51424,7 @@
18: 23 6c mov r2,r12
1a: 11 52 mov.l @(4,r1),r2
1c: 33 6d mov r3,r13
- 1e: 6a d3 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r3 ! fffffff
+ 1e: 6b d3 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r3 ! fffffff
20: 53 6e mov r5,r14
22: 42 64 mov.l @r4,r4
24: 38 22 tst r3,r2
@@ -51446,7 +51446,7 @@
44: f6 69 mov.l @r15+,r9
46: 0b 00 rts
48: f6 68 mov.l @r15+,r8
- 4a: 5f d3 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r3 ! fffffff
+ 4a: 60 d3 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r3 ! fffffff
4c: 30 35 cmp/eq r3,r5
4e: 6a 8d bt.s 126 <_ZNK13profile_count11apply_scaleExx+0x126>
50: 43 60 mov r4,r0
@@ -51459,14 +51459,14 @@
5e: 15 49 cmp/pl r9
60: 96 38 cmp/hi r9,r8
62: 01 89 bt 68 <_ZNK13profile_count11apply_scaleExx+0x68>
- 64: a9 a0 bra 1ba <_ZNK13profile_count11apply_scaleExx+0x1ba>
+ 64: aa a0 bra 1bc <_ZNK13profile_count11apply_scaleExx+0x1bc>
66: 09 00 nop
68: 58 25 tst r5,r5
6a: 70 8f bf.s 14e <_ZNK13profile_count11apply_scaleExx+0x14e>
6c: 00 e6 mov #0,r6
6e: 78 27 tst r7,r7
70: 01 89 bt 76 <_ZNK13profile_count11apply_scaleExx+0x76>
- 72: 7f a0 bra 174 <_ZNK13profile_count11apply_scaleExx+0x174>
+ 72: 80 a0 bra 176 <_ZNK13profile_count11apply_scaleExx+0x176>
74: 73 63 mov r7,r3
76: e5 34 dmulu.l r14,r4
78: 1a 00 sts macl,r0
@@ -51487,31 +51487,31 @@
96: 04 89 bt a2 <_ZNK13profile_count11apply_scaleExx+0xa2>
98: 32 30 cmp/hs r3,r0
9a: 01 8b bf a0 <_ZNK13profile_count11apply_scaleExx+0xa0>
- 9c: 88 a0 bra 1b0 <_ZNK13profile_count11apply_scaleExx+0x1b0>
+ 9c: 89 a0 bra 1b2 <_ZNK13profile_count11apply_scaleExx+0x1b2>
9e: f3 58 mov.l @(12,r15),r8
a0: 01 e6 mov #1,r6
a2: 68 26 tst r6,r6
a4: 0f 8f bf.s c6 <_ZNK13profile_count11apply_scaleExx+0xc6>
a6: c3 66 mov r12,r6
a8: 03 65 mov r0,r5
- aa: 48 d0 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r0 ! 0
<_ZNK13profile_count11apply_scaleExx>
+ aa: 49 d0 mov.l 1d0
<_ZNK13profile_count11apply_scaleExx+0x1d0>,r0 ! 0
<_ZNK13profile_count11apply_scaleExx>
ac: 23 1f mov.l r2,@(12,r15)
ae: d3 67 mov r13,r7
b0: 0b 40 jsr @r0
b2: b3 64 mov r11,r4
- b4: 44 d7 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r7 ! fffffff
+ b4: 45 d7 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r7 ! fffffff
b6: 03 66 mov r0,r6
b8: f3 52 mov.l @(12,r15),r2
ba: 72 31 cmp/hs r7,r1
- bc: 5c 8d bt.s 178 <_ZNK13profile_count11apply_scaleExx+0x178>
+ bc: 5d 8d bt.s 17a <_ZNK13profile_count11apply_scaleExx+0x17a>
be: 13 63 mov r1,r3
- c0: 41 d1 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r1 ! fffffff
+ c0: 42 d1 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r1 ! fffffff
c2: 1a a0 bra fa <_ZNK13profile_count11apply_scaleExx+0xfa>
c4: 19 23 and r1,r3
c6: d8 2d tst r13,r13
c8: 3b 8d bt.s 142 <_ZNK13profile_count11apply_scaleExx+0x142>
ca: c3 60 mov r12,r0
- cc: 40 d0 mov.l 1d0
<_ZNK13profile_count11apply_scaleExx+0x1d0>,r0 ! 0
<_ZNK13profile_count11apply_scaleExx>
+ cc: 41 d0 mov.l 1d4
<_ZNK13profile_count11apply_scaleExx+0x1d4>,r0 ! 0
<_ZNK13profile_count11apply_scaleExx>
ce: f3 62 mov r15,r2
d0: 10 72 add #16,r2
d2: 13 1f mov.l r1,@(12,r15)
@@ -51521,17 +51521,17 @@
da: 0b 40 jsr @r0
dc: d1 1f mov.l r13,@(4,r15)
de: f5 53 mov.l @(20,r15),r3
- e0: 39 d2 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r2 ! fffffff
+ e0: 3a d2 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r2 ! fffffff
e2: f4 50 mov.l @(16,r15),r0
e4: 22 33 cmp/hs r2,r3
e6: 05 8f bf.s f4 <_ZNK13profile_count11apply_scaleExx+0xf4>
e8: f3 51 mov.l @(12,r15),r1
ea: 26 33 cmp/hi r2,r3
- ec: 5c 8f bf.s 1a8 <_ZNK13profile_count11apply_scaleExx+0x1a8>
+ ec: 5d 8f bf.s 1aa <_ZNK13profile_count11apply_scaleExx+0x1aa>
ee: fe e2 mov #-2,r2
- f0: 35 d3 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r3 ! fffffff
+ f0: 36 d3 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r3 ! fffffff
f2: fe e0 mov #-2,r0
- f4: 34 d2 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r2 ! fffffff
+ f4: 35 d2 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r2 ! fffffff
f6: 29 23 and r2,r3
f8: 11 52 mov.l @(4,r1),r2
fa: e4 e1 mov #-28,r1
@@ -51543,7 +51543,7 @@
106: 07 e1 mov #7,r1
108: 1c e2 mov #28,r2
10a: 2d 41 shld r2,r1
- 10c: 2e d2 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r2 ! fffffff
+ 10c: 2f d2 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r2 ! fffffff
10e: 29 23 and r2,r3
110: 3b 21 or r3,r1
112: 18 7f add #24,r15
@@ -51558,7 +51558,7 @@
124: f6 68 mov.l @r15+,r8
126: ff 88 cmp/eq #-1,r0
128: 93 8b bf 52 <_ZNK13profile_count11apply_scaleExx+0x52>
- 12a: 2a d1 mov.l 1d4
<_ZNK13profile_count11apply_scaleExx+0x1d4>,r1 ! 10000000
+ 12a: 2b d1 mov.l 1d8
<_ZNK13profile_count11apply_scaleExx+0x1d8>,r1 ! 10000000
12c: 5b 21 or r5,r1
12e: 18 7f add #24,r15
130: 26 4f lds.l @r15+,pr
@@ -51573,77 +51573,79 @@
142: 01 88 cmp/eq #1,r0
144: c2 8f bf.s cc <_ZNK13profile_count11apply_scaleExx+0xcc>
146: fe e0 mov #-2,r0
- 148: 1f d3 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r3 ! fffffff
+ 148: 20 d3 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r3 ! fffffff
14a: d7 af bra fc <_ZNK13profile_count11apply_scaleExx+0xfc>
14c: e4 e1 mov #-28,r1
14e: 78 27 tst r7,r7
- 150: 1a 8f bf.s 188 <_ZNK13profile_count11apply_scaleExx+0x188>
+ 150: 1b 8f bf.s 18a <_ZNK13profile_count11apply_scaleExx+0x18a>
152: 53 63 mov r5,r3
154: e3 60 mov r14,r0
156: e5 34 dmulu.l r14,r4
158: 08 00 clrt
- 15a: 0a 0b sts mach,r11
- 15c: 1a 0a sts macl,r10
+ 15a: 0a 0a sts mach,r10
+ 15c: 1a 09 sts macl,r9
15e: 35 30 dmulu.l r3,r0
160: 00 e0 mov #0,r0
- 162: 1a 08 sts macl,r8
- 164: 0a 09 sts mach,r9
- 166: be 38 addc r11,r8
- 168: 0e 39 addc r0,r9
- 16a: 98 29 tst r9,r9
- 16c: 0c 8f bf.s 188 <_ZNK13profile_count11apply_scaleExx+0x188>
- 16e: 83 63 mov r8,r3
- 170: 84 af bra 7c <_ZNK13profile_count11apply_scaleExx+0x7c>
- 172: a3 60 mov r10,r0
- 174: ef af bra 156 <_ZNK13profile_count11apply_scaleExx+0x156>
- 176: 43 60 mov r4,r0
- 178: 76 31 cmp/hi r7,r1
- 17a: 10 8f bf.s 19e <_ZNK13profile_count11apply_scaleExx+0x19e>
- 17c: fe e1 mov #-2,r1
- 17e: 12 d3 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r3 ! fffffff
- 180: fe e0 mov #-2,r0
- 182: 11 d1 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r1 ! fffffff
- 184: b9 af bra fa <_ZNK13profile_count11apply_scaleExx+0xfa>
- 186: 19 23 and r1,r3
- 188: e7 05 mul.l r14,r5
- 18a: 1a 03 sts macl,r3
- 18c: 77 04 mul.l r7,r4
- 18e: 1a 00 sts macl,r0
- 190: e5 34 dmulu.l r14,r4
- 192: 0c 33 add r0,r3
- 194: 0a 06 sts mach,r6
- 196: 1a 00 sts macl,r0
- 198: 6c 33 add r6,r3
- 19a: 6f af bra 7c <_ZNK13profile_count11apply_scaleExx+0x7c>
- 19c: 01 e6 mov #1,r6
- 19e: 16 36 cmp/hi r1,r6
- 1a0: ed 89 bt 17e <_ZNK13profile_count11apply_scaleExx+0x17e>
- 1a2: 09 d1 mov.l 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r1 ! fffffff
- 1a4: a9 af bra fa <_ZNK13profile_count11apply_scaleExx+0xfa>
- 1a6: 19 23 and r1,r3
- 1a8: 26 30 cmp/hi r2,r0
- 1aa: a3 8b bf f4 <_ZNK13profile_count11apply_scaleExx+0xf4>
- 1ac: a0 af bra f0 <_ZNK13profile_count11apply_scaleExx+0xf0>
- 1ae: 09 00 nop
- 1b0: 82 3b cmp/hs r8,r11
- 1b2: 00 89 bt 1b6 <_ZNK13profile_count11apply_scaleExx+0x1b6>
- 1b4: 01 e6 mov #1,r6
- 1b6: 75 af bra a4 <_ZNK13profile_count11apply_scaleExx+0xa4>
- 1b8: 68 26 tst r6,r6
- 1ba: 07 d1 mov.l 1d8
<_ZNK13profile_count11apply_scaleExx+0x1d8>,r1 ! 0
<_ZNK13profile_count11apply_scaleExx>
- 1bc: 07 d6 mov.l 1dc
<_ZNK13profile_count11apply_scaleExx+0x1dc>,r6 ! 0
<_ZNK13profile_count11apply_scaleExx>
- 1be: 02 95 mov.w 1c6
<_ZNK13profile_count11apply_scaleExx+0x1c6>,r5 ! 497
- 1c0: 07 d4 mov.l 1e0
<_ZNK13profile_count11apply_scaleExx+0x1e0>,r4 ! f8
- 1c2: 0b 41 jsr @r1
- 1c4: 09 00 nop
- 1c6: 97 04 mul.l r9,r4
- 1c8: ff ff .word 0xffff
- 1ca: ff 0f mac.l @r15+,@r15+
+ 162: a3 63 mov r10,r3
+ 164: 1a 0b sts macl,r11
+ 166: 0a 08 sts mach,r8
+ 168: be 33 addc r11,r3
+ 16a: 0e 38 addc r0,r8
+ 16c: 88 28 tst r8,r8
+ 16e: 0c 8f bf.s 18a <_ZNK13profile_count11apply_scaleExx+0x18a>
+ 170: 93 60 mov r9,r0
+ 172: 84 af bra 7e <_ZNK13profile_count11apply_scaleExx+0x7e>
+ 174: 68 26 tst r6,r6
+ 176: ee af bra 156 <_ZNK13profile_count11apply_scaleExx+0x156>
+ 178: 43 60 mov r4,r0
+ 17a: 76 31 cmp/hi r7,r1
+ 17c: 10 8f bf.s 1a0 <_ZNK13profile_count11apply_scaleExx+0x1a0>
+ 17e: fe e1 mov #-2,r1
+ 180: 12 d3 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r3 ! fffffff
+ 182: fe e0 mov #-2,r0
+ 184: 11 d1 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r1 ! fffffff
+ 186: b8 af bra fa <_ZNK13profile_count11apply_scaleExx+0xfa>
+ 188: 19 23 and r1,r3
+ 18a: e7 05 mul.l r14,r5
+ 18c: 1a 03 sts macl,r3
+ 18e: 77 04 mul.l r7,r4
+ 190: 1a 00 sts macl,r0
+ 192: e5 34 dmulu.l r14,r4
+ 194: 0c 33 add r0,r3
+ 196: 0a 06 sts mach,r6
+ 198: 1a 00 sts macl,r0
+ 19a: 6c 33 add r6,r3
+ 19c: 6e af bra 7c <_ZNK13profile_count11apply_scaleExx+0x7c>
+ 19e: 01 e6 mov #1,r6
+ 1a0: 16 36 cmp/hi r1,r6
+ 1a2: ed 89 bt 180 <_ZNK13profile_count11apply_scaleExx+0x180>
+ 1a4: 09 d1 mov.l 1cc
<_ZNK13profile_count11apply_scaleExx+0x1cc>,r1 ! fffffff
+ 1a6: a8 af bra fa <_ZNK13profile_count11apply_scaleExx+0xfa>
+ 1a8: 19 23 and r1,r3
+ 1aa: 26 30 cmp/hi r2,r0
+ 1ac: a2 8b bf f4 <_ZNK13profile_count11apply_scaleExx+0xf4>
+ 1ae: 9f af bra f0 <_ZNK13profile_count11apply_scaleExx+0xf0>
+ 1b0: 09 00 nop
+ 1b2: 82 3b cmp/hs r8,r11
+ 1b4: 00 89 bt 1b8 <_ZNK13profile_count11apply_scaleExx+0x1b8>
+ 1b6: 01 e6 mov #1,r6
+ 1b8: 74 af bra a4 <_ZNK13profile_count11apply_scaleExx+0xa4>
+ 1ba: 68 26 tst r6,r6
+ 1bc: 07 d1 mov.l 1dc
<_ZNK13profile_count11apply_scaleExx+0x1dc>,r1 ! 0
<_ZNK13profile_count11apply_scaleExx>
+ 1be: 08 d6 mov.l 1e0
<_ZNK13profile_count11apply_scaleExx+0x1e0>,r6 ! 0
<_ZNK13profile_count11apply_scaleExx>
+ 1c0: 02 95 mov.w 1c8
<_ZNK13profile_count11apply_scaleExx+0x1c8>,r5 ! 497
+ 1c2: 08 d4 mov.l 1e4
<_ZNK13profile_count11apply_scaleExx+0x1e4>,r4 ! f8
+ 1c4: 0b 41 jsr @r1
+ 1c6: 09 00 nop
+ 1c8: 97 04 mul.l r9,r4
+ 1ca: 09 00 nop
+ 1cc: ff ff .word 0xffff
+ 1ce: ff 0f mac.l @r15+,@r15+
...
- 1d4: 00 00 .word 0x0000
- 1d6: 00 10 mov.l r0,@(0,r0)
+ 1d8: 00 00 .word 0x0000
+ 1da: 00 10 mov.l r0,@(0,r0)
...
- 1e0: f8 00 .word 0x00f8
+ 1e4: f8 00 .word 0x00f8
...
Disassembly of section .text._ZNK13profile_count3ipaEv:
In Debian, we currently ignore this diff by adding the following line to
src/configure.ac:
compare_exclusions="$compare_exclusions | gcc/ipa-cp\$(objext)"
