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I also checked that foo stays the same generated code regardless of the new code: this is not obviously true as foo is "just" noinline, not __noipa__. Ok to commit? -- >8 -- This test awkwardly "blinks"; xfails and xpasses apparently randomly for cris-elf using the "gdb simulator". On inspection, I see that the stack address depends on the number of environment variables, deliberately passed to the simulator, each adding the size of a pointer. This test is IMHO important enough not to be just skipped just because it blinks (fixing the actual problem is a different task). I guess a random non-16 stack-alignment could happen for other targets as well, so let's try and add a generic machinery to "stabilize" the test as failing, by allocating a dynamic amount to make sure it's misaligned. The most target-dependent item here is an offset between the incoming stack-pointer value (within main in the added framework) and outgoing (within "xmain" as called from main when setting up the p0 parameter). I know there are other wonderful stack shapes, but such targets would fall under the "complicated situations"-label and are no worse off than before. * gcc.dg/pr84877.c: Try to make the test result consistent by misaligning the stack. --- gcc/testsuite/gcc.dg/pr84877.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/gcc/testsuite/gcc.dg/pr84877.c b/gcc/testsuite/gcc.dg/pr84877.c index e82991f42dd4..2f2e29578df9 100644 --- a/gcc/testsuite/gcc.dg/pr84877.c +++ b/gcc/testsuite/gcc.dg/pr84877.c @@ -3,6 +3,32 @@ #include +#ifdef __CRIS__ +#define OUTGOING_SP_OFFSET (-sizeof (void *)) +/* Suggestion: append #elif defined(____) after this comment, + either defining OUTGOING_SP_OFFSET to whatever the pertinent amount is at -O2, + if that makes your target consistently fail this test, or define + DO_NOT_TAMPER for more complicated situations. Either way, compile with + -DDO_NO_TAMPER to avoid any meddling. */ +#endif + +#if defined (OUTGOING_SP_OFFSET) && !defined (DO_NOT_TAMPER) +extern int xmain () __attribute__ ((__noipa__)); +int main () +{ + uintptr_t misalignment + = (OUTGOING_SP_OFFSET + + (15 & (uintptr_t) __builtin_stack_address ())); + /* Allocate a minimal amount if the stack was accidentally aligned. */ + void *q = __builtin_alloca (misalignment == 0); + xmain (); + /* Fake use to avoid the "allocation" being optimized out. */ + asm volatile ("" : : "rm" (q)); + return 0; +} +#define main xmain +#endif + struct U { int M0; int M1;