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Re: [3.3 branch, 6 regressions] Re: 'fix' for 11350 causes bootstrap hang on Darwin


Jan Hubicka writes:
> > 
> > 
> > On Fri, 23 Jan 2004, Krister Walfridsson wrote:
> > 
> > > The change
> > >
> > > 2004-01-18  Jan Hubicka  <jh@suse.cz>
> > >
> > > 	* basic-block.h (try_redirect_by_replacing_jump): Declare.
> > > 	* cfgcleanup.c (try_optimize_cfg): Use it.
> > > 	* cfgrtl.c (try_redirect_by_replacing_jump): Export.
> > > 	(rtl_redirect_edge_and_branch, cfg_layout_redirect_edge_and_branch):
> > > 	Kill hack.
> > > 	(cfg_layout_merge_blocks): Use try_redirect_by_replacing_jump.
> > >
> > > 	Revert:
> > > 	2004-01-16  Geoffrey Keating  <geoffk@apple.com>
> > >
> > > 		* cfgrtl.c (try_redirect_by_replacing_jump): Optimize tablejumps
> > > 		even after reload, just don't remove the actual jump tables.
> > >
> > > causes bootstrap comparison failure for i386-unknown-netbsdelf1.6.
> > > It looks like all .o files differs...
> > >
> > > I'll try to dig up some more info, but I'm not really sure where to
> > > start...
> > 
> > Running the testsuite on the compiler from the first stage shows
> > that the change introduces these new failures:
> > 
> > FAIL: gcc.c-torture/compile/goto-1.c (test for excess errors)
> > FAIL: gcc.c-torture/compile/goto-1.c (test for excess errors)
> > FAIL: gcc.c-torture/compile/goto-1.c (test for excess errors)
> > FAIL: gcc.c-torture/compile/goto-1.c (test for excess errors)
> > FAIL: gcc.c-torture/compile/goto-1.c (test for excess errors)
> > FAIL: gcc.c-torture/execute/930603-2.c compilation,  -O3 -fomit-frame-pointer -funroll-loops
> > FAIL: gcc.c-torture/execute/930603-2.c compilation,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions
> 
> You did so with the patch backported to gcc-3.3 or is it about the
> mainline GCC?
> Can you forward me the errors produced by these testcases?

re-ran this on i486-linux. the current 3.3 branch, compared to the 3.3
branch with the following backported patch applied, has four
regressions:

Update for PR11350

2004-01-16  Geoffrey Keating  <geoffk@apple.com>

	* cfgrtl.c (try_redirect_by_replacing_jump): Optimize tablejumps
	even after reload, just don't remove the actual jump tables.

+FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O1 
+UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O1 
+FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O2 
+UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O2 
+FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O3 -g 
+UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O3 -g 
+FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -Os 
+UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -Os 
+FAIL: gcc.dg/20030309-1.c (test for excess errors)

I didn't check, if the 3.3 branch without this patch fails to
bootstrap on powerpc-linux.

	Matthias

[extract from testsuite/gcc.log]:

Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -O0   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x0    (timeout = 450)
PASS: gcc.c-torture/execute/20011219-1.c compilation,  -O0 
PASS: gcc.c-torture/execute/20011219-1.c execution,  -O0 
Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -O1   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x1    (timeout = 450)
/tmp/ccOdHcfn.o(.rodata+0xc): undefined reference to `.L7'

collect2: ld returned 1 exit status

compiler exited with status 1
output is:
/tmp/ccOdHcfn.o(.rodata+0xc): undefined reference to `.L7'

collect2: ld returned 1 exit status


FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O1 
UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O1 
Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -O2   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x2    (timeout = 450)
/tmp/cccVT2ev.o(.rodata+0x0): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0x4): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0x8): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0xc): undefined reference to `.L7'

/tmp/cccVT2ev.o(.rodata+0x10): undefined reference to `.L8'

collect2: ld returned 1 exit status

compiler exited with status 1
output is:
/tmp/cccVT2ev.o(.rodata+0x0): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0x4): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0x8): undefined reference to `.L8'

/tmp/cccVT2ev.o(.rodata+0xc): undefined reference to `.L7'

/tmp/cccVT2ev.o(.rodata+0x10): undefined reference to `.L8'

collect2: ld returned 1 exit status


FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O2 
UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O2 
Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -O3 -fomit-frame-pointer   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x3    (timeout = 450)
PASS: gcc.c-torture/execute/20011219-1.c compilation,  -O3 -fomit-frame-pointer 
PASS: gcc.c-torture/execute/20011219-1.c execution,  -O3 -fomit-frame-pointer 
Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -O3 -g   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x4    (timeout = 450)
/tmp/cck7d3YL.o(.rodata+0x0): In function `main':

/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:44: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0x4):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:44: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0x8):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:45: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0xc):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:45: undefined reference to `.L19'

/tmp/cck7d3YL.o(.rodata+0x10):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:48: undefined reference to `.L20'

collect2: ld returned 1 exit status

compiler exited with status 1
output is:
/tmp/cck7d3YL.o(.rodata+0x0): In function `main':

/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:44: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0x4):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:44: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0x8):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:45: undefined reference to `.L20'

/tmp/cck7d3YL.o(.rodata+0xc):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:45: undefined reference to `.L19'

/tmp/cck7d3YL.o(.rodata+0x10):/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c:48: undefined reference to `.L20'

collect2: ld returned 1 exit status


FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -O3 -g 
UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -O3 -g 
Executing on host: /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/xgcc -B/home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/ /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/src/gcc/testsuite/gcc.c-torture/execute/20011219-1.c  -w  -Os   -lm   -o /home/packages/gcc/3.3/gcc-3.3-3.3.3ds3/build/gcc/testsuite/20011219-1.x5    (timeout = 450)
/tmp/cc8XwLTU.o(.rodata+0x0): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0x4): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0x8): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0xc): undefined reference to `.L7'

/tmp/cc8XwLTU.o(.rodata+0x10): undefined reference to `.L8'

collect2: ld returned 1 exit status

compiler exited with status 1
output is:
/tmp/cc8XwLTU.o(.rodata+0x0): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0x4): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0x8): undefined reference to `.L8'

/tmp/cc8XwLTU.o(.rodata+0xc): undefined reference to `.L7'

/tmp/cc8XwLTU.o(.rodata+0x10): undefined reference to `.L8'

collect2: ld returned 1 exit status


FAIL: gcc.c-torture/execute/20011219-1.c compilation,  -Os 
UNRESOLVED: gcc.c-torture/execute/20011219-1.c execution,  -Os 

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