Hi, This patch fixes PR 105523 by setting param_min_pagesize to 0 for the avr target. For this target, zero and offsets from zero are perfectly valid addresses, and the default value of param_min_pagesize ends up triggering warnings on valid memory accesses.
Ok for trunk and backporting to 13 and 12 branches? Regards Senthil PR target/105523 gcc/ChangeLog: * config/avr/avr.cc (avr_option_override): Set param_min_pagesize to 0. gcc/testsuite/ChangeLog: * gcc.target/avr/pr105523.c: New test. diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc index c193430cf07..3b862f4e4ac 100644 --- a/gcc/config/avr/avr.cc +++ b/gcc/config/avr/avr.cc @@ -56,6 +56,7 @@ #include "tree-pass.h" #include "print-rtl.h" #include "rtl-iter.h" +#include "opts.h" /* This file should be included last. */ #include "target-def.h" @@ -769,6 +770,9 @@ avr_option_override (void) avr_gasisr_prologues = 0; #endif + SET_OPTION_IF_UNSET (&global_options, &global_options_set, + param_min_pagesize, 0); + if (!avr_set_core_architecture()) return; diff --git a/gcc/testsuite/gcc.target/avr/pr105523.c b/gcc/testsuite/gcc.target/avr/pr105523.c new file mode 100644 index 00000000000..fbbf7bf4422 --- /dev/null +++ b/gcc/testsuite/gcc.target/avr/pr105523.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-Os -Wall" } */ + +/* Verify no "array subscript 0 is outside array bounds of" is generated + for accessing memory addresses in the 0-4096 range. */ + +typedef __UINT8_TYPE__ uint8_t; + +#define SREG (*(volatile uint8_t*) (0x3F + __AVR_SFR_OFFSET__ )) + +void bar (void) +{ + SREG = 0; +}