Re: C PATCH: Convert to function-at-a-time mode

[Franz Sirl <Franz dot Sirl-kernel at lauterbach dot com>]

On Sun, 17 Sep 2000, Mark Mitchell wrote:
> This patch converts the C front-end to function-at-a-time mode, and
> also continues the effort towards sharing code between the C and C++
> front-ends.
>
> This patch was bootstrapped and tested on i686-pc-linux-gnu.  There is
> one regression failure in compare2.c; code like:
>
>     y > ({tf; 64;}); /* { dg-bogus "signed and unsigned" "case 10" } */
>
> where `y' is signed now yields a warning, where it did not do so
> previously.  This worked only because we generated RTL for the
> statement-expression, and then just looked at the last RTL value.  We
> could see that it was a non-negative constant, so we didn't warn.
> Now, using a STMT_EXPR tree node, we are unable to determine this.
> (We could walk around in the STMT_EXPR to find the last expression,
> but we don't.)
>
> I would be quite surprised if a change of this magnitude had no other
> ill effects -- but I don't know of any at this time.  Obviously, we'll
> fix them when they show up. :-)

Here you have a bunch of regressions that show up on powerpc-linux-gnu :-) :

FAIL: gcc.c-torture/execute/991216-3.c execution,  -O0
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O1
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O2
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O3 -fomit-frame-pointer 
-funroll-loops
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O3 -fomit-frame-pointer 
-funroll-all-loops -finline-functions
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/991216-3.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/991216-3.c execution,  -Os
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O0
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O1
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O2
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O3 
-fomit-frame-pointer
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/strct-varg-1.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O3 -fomit-frame-pointer 
-funroll-loops
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O3 -fomit-frame-pointer 
-funroll-all-loops -finline-functions
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-15.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-16.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-17.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-19.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O3 -fomit-frame-pointer 
-funroll-loops
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O3 -fomit-frame-pointer 
-funroll-all-loops -finline-functions
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-3.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-7.c execution,  -Os
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O0
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O1
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O2
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O3 -g
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -O3 -fssa
FAIL: gcc.c-torture/execute/va-arg-8.c execution,  -Os

I doubt I can look at that seriously before the Oktoberfest ends :-)

Franz.