Hi, with -march=z10 we use much higher values for peel and unroll limits. This makes the loop in the testcase to disappear on tree level already. With the patch these values are set back to the default values making the testcase to pass again.
Committed to mainline Bye, -Andreas- 2015-03-05 Andreas Krebbel <kreb...@linux.vnet.ibm.com> * gcc.dg/var-expand1.c: Force max-completely-peel-times and max-unroll-times back to defaults for s390. diff --git a/gcc/testsuite/gcc.dg/var-expand1.c b/gcc/testsuite/gcc.dg/var-expand1.c index 7de4cfb..fb039d3 100644 --- a/gcc/testsuite/gcc.dg/var-expand1.c +++ b/gcc/testsuite/gcc.dg/var-expand1.c @@ -3,6 +3,7 @@ targets, where each addition is a library call. */ /* { dg-require-effective-target hard_float } */ /* { dg-options "-O2 -funroll-loops --fast-math -fvariable-expansion-in-unroller -fdump-rtl-loop2_unroll" } */ +/* { dg-additional-options "--param max-completely-peel-times=16 --param max-unroll-times=8" { target s390*-*-* } } */ extern void abort (void);