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AVR: tree-optimization/115307 - Work around isinf bloat from early passes.

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PR tree-optimization/115307
gcc/
	* config/avr/avr.md (SFDF): New mode iterator.
	(isinf<mode>2) [sf, df]: New expanders.

gcc/testsuite/
	* gcc.target/avr/torture/pr115307-isinf.c: New test.

(cherry picked from commit fabb545026f714b7d1cbe586f4c5bbf6430bdde3)
This commit is contained in:
Georg-Johann Lay 2024-06-01 10:38:00 +02:00
parent 5ca4e161b6
commit 9d08c55f7c
2 changed files with 37 additions and 0 deletions
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16
gcc/config/avr/avr.md
View file

@ -292,6 +292,8 @@
(define_mode_iterator SPLIT34 [SI SF PSI
SQ USQ SA USA])
(define_mode_iterator SFDF [SF DF])
;; Where the most significant bit is located.
(define_mode_attr MSB [(QI "7") (QQ "7") (UQQ "7")
(HI "15") (HQ "15") (UHQ "15") (HA "15") (UHA "15")
@ -10047,6 +10049,20 @@
(const_int 1)
(match_dup 2)))])
;; Work around PR115307: Early passes expand isinf/f/l to a bloat.
;; These passes do not consider costs, and there is no way to
;; hook in or otherwise disable the generated bloat.
;; isinfsf2 isinfdf2
(define_expand "isinf<mode>2"
[(parallel [(match_operand:HI 0)
(match_operand:SFDF 1)])]
""
{
FAIL;
})
;; Fixed-point instructions
(include "avr-fixed.md")

21
gcc/testsuite/gcc.target/avr/torture/pr115307-isinf.c Normal file
View file

@ -0,0 +1,21 @@
/* { dg-do compile } */
int call_isinff (float f)
{
int isinff (float);
return isinff (f);
}
int call_isinf (double f)
{
int isinf (double);
return isinf (f);
}
int call_isinfl (long double f)
{
int isinfl (long double);
return isinfl (f);
}
/* { dg-final { scan-assembler-not "unord" } } */