On Wed, May 08, 2019 at 06:09:06PM +0800, JunMa wrote:
> 2019-05-07 Jun Ma <ju...@linux.alibaba.com>
>
> PR tree-optimization/90106
> * gcc.dg/cdce1.c: Check tailcall code generation after cdce pass.
> * gcc.dg/cdce2.c: Likewise.
This is wrong and results in UNSUPPORTED failures.
Both tests are dg-do run, so you can't scan-assembler for them, assembly
isn't generated at all (it could be if -save-temps is in dg-options).
Furthermore, I don't any target actually spells the tailcall in the assembly
as jmp space pow/log, rather than say on x86_64/i686 jmp tab pow/log, but
on most other targets completely differently (and some targets don't support
tail calls at all, or have various limitations for them etc.).
One possibility is to add -fdump-tree-optimized and scan for
/* { dg-final { scan-tree-dump "pow \\(\[^\n\r]*\\); \\\[tail call\\\]"
"optimized" } } */
resp.
/* { dg-final { scan-tree-dump "log \\(\[^\n\r]*\\); \\\[tail call\\\]"
"optimized" } } */
> diff --git a/gcc/testsuite/gcc.dg/cdce1.c b/gcc/testsuite/gcc.dg/cdce1.c
> index b23ad63..424d80f 100644
> --- a/gcc/testsuite/gcc.dg/cdce1.c
> +++ b/gcc/testsuite/gcc.dg/cdce1.c
> @@ -1,7 +1,8 @@
> /* { dg-do run } */
> /* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details -lm" } */
> /* { dg-require-effective-target int32plus } */
> -/* { dg-final { scan-tree-dump "cdce1.c:16: .* function call is
> shrink-wrapped into error conditions\." "cdce" } } */
> +/* { dg-final { scan-tree-dump "cdce1.c:17: .* function call is
> shrink-wrapped into error conditions\." "cdce" } } */
> +/* { dg-final { scan-assembler "jmp pow" } } */
> /* { dg-require-effective-target large_double } */
>
> #include <stdlib.h>
> diff --git a/gcc/testsuite/gcc.dg/cdce2.c b/gcc/testsuite/gcc.dg/cdce2.c
> index 30e7cb1..2af2893 100644
> --- a/gcc/testsuite/gcc.dg/cdce2.c
> +++ b/gcc/testsuite/gcc.dg/cdce2.c
> @@ -1,7 +1,8 @@
> /* { dg-do run } */
> /* { dg-skip-if "doubles are floats" { "avr-*-*" } } */
> /* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details -lm" } */
> -/* { dg-final { scan-tree-dump "cdce2.c:15: .* function call is
> shrink-wrapped into error conditions\." "cdce" } } */
> +/* { dg-final { scan-tree-dump "cdce2.c:16: .* function call is
> shrink-wrapped into error conditions\." "cdce" } } */
> +/* { dg-final { scan-assembler "jmp log" } } */
>
> #include <stdlib.h>
> #include <math.h>
Jakub
