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| author | Jozef Lawrynowicz <jozef.l@somniumtech.com> | 2017-08-29 13:20:54 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2017-08-29 13:20:54 +0000 |
| commit | 10bcba61fcfb0cd7f7a2ba64f1a14c62e3512eca (patch) | |
| tree | fd759dda7c8b5631184e9c73ef69ce837b65adc3 /gcc | |
| parent | 12d847913a96fc78111f22f4caea9bdf707b8566 (diff) | |
| download | gcc-10bcba61fcfb0cd7f7a2ba64f1a14c62e3512eca.zip gcc-10bcba61fcfb0cd7f7a2ba64f1a14c62e3512eca.tar.gz gcc-10bcba61fcfb0cd7f7a2ba64f1a14c62e3512eca.tar.bz2 | |
re PR target/80993 ([msp430] __attribute__((interrupt)) should imply __attribute__((used)))
PR target/80993
* gcc/config/msp430/msp430.c (msp430_attr): Mark interrupt
handlers as used.
From-SVN: r251410
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/msp430/msp430.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/msp430/pr80993.c | 13 |
3 files changed, 23 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0002ce1..951e6e8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-08-29 Jozef Lawrynowicz <jozef.l@somniumtech.com> + + PR target/80993 + * gcc/config/msp430/msp430.c (msp430_attr): Mark interrupt + handlers as used. + 2017-08-29 Richard Biener <rguenther@suse.de> * dwarf2out.c (add_dwarf_attr): When checking is enabled verify diff --git a/gcc/config/msp430/msp430.c b/gcc/config/msp430/msp430.c index 2b4427d..48fc12d 100644 --- a/gcc/config/msp430/msp430.c +++ b/gcc/config/msp430/msp430.c @@ -1904,6 +1904,10 @@ msp430_attr (tree * node, if (! TREE_PUBLIC (* node)) message = "interrupt handlers cannot be static"; + + /* Ensure interrupt handlers never get optimised out. */ + TREE_USED (* node) = 1; + DECL_PRESERVE_P (* node) = 1; } else if (TREE_NAME_EQ (name, ATTR_REENT)) { diff --git a/gcc/testsuite/gcc.target/msp430/pr80993.c b/gcc/testsuite/gcc.target/msp430/pr80993.c new file mode 100644 index 0000000..4da5cf9 --- /dev/null +++ b/gcc/testsuite/gcc.target/msp430/pr80993.c @@ -0,0 +1,13 @@ +/* { dg-do link } */ +/* { dg-options "--save-temps -msim -flto -Os" } */ +/* { dg-final { scan-file "pr80993.exe.ltrans0.s" no_ref_handler } } */ + +void __attribute__((interrupt)) no_ref_handler (void) +{ + while (1); +} + +int main (void) +{ + return 0; +} |