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| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2014-04-04 21:58:34 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2014-04-04 21:58:34 +0000 |
| commit | 961e89f297ee15a1fa8ce510a98f34fc7062e52d (patch) | |
| tree | d313906c609b3accba15f2d13e13ccce8359ad21 /gcc | |
| parent | 090ec70209ce4d706bb618d5efbc1325ade0341f (diff) | |
| download | gcc-961e89f297ee15a1fa8ce510a98f34fc7062e52d.zip gcc-961e89f297ee15a1fa8ce510a98f34fc7062e52d.tar.gz gcc-961e89f297ee15a1fa8ce510a98f34fc7062e52d.tar.bz2 | |
builtin-bswap-6.c: Adjust return value to disable GCC optimization.
2014-04-04 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* gcc.dg/builtin-bswap-6.c: Adjust return value to disable GCC
optimization.
* gcc.dg/builtin-bswap-7.c: Likewise.
From-SVN: r209132
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/builtin-bswap-6.c | 12 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/builtin-bswap-7.c | 12 |
3 files changed, 22 insertions, 8 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 0cd68ca..7d030fd 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2014-04-04 Andreas Krebbel <Andreas.Krebbel@de.ibm.com> + + * gcc.dg/builtin-bswap-6.c: Adjust return value to disable GCC + optimization. + * gcc.dg/builtin-bswap-7.c: Likewise. + 2014-04-04 Paolo Carlini <paolo.carlini@oracle.com> PR c++/58207 diff --git a/gcc/testsuite/gcc.dg/builtin-bswap-6.c b/gcc/testsuite/gcc.dg/builtin-bswap-6.c index 024ebf1..6f0c782 100644 --- a/gcc/testsuite/gcc.dg/builtin-bswap-6.c +++ b/gcc/testsuite/gcc.dg/builtin-bswap-6.c @@ -3,6 +3,10 @@ /* { dg-options "-O -fdump-rtl-combine" } */ /* { dg-options "-O -fdump-rtl-combine -march=z900" { target s390-*-* } } */ +/* The test intentionally returns 1/2 instead of the obvious 0/1 to + prevent GCC from calculating the return value with arithmetic + instead of a comparison. */ + #include <stdint.h> #define BS(X) __builtin_bswap32(X) @@ -11,28 +15,28 @@ int foo1 (uint32_t a) { if (BS (a) == 0xA0000) return 1; - return 0; + return 2; } int foo2 (uint32_t a) { if (BS (a) != 0xA0000) return 1; - return 0; + return 2; } int foo3 (uint32_t a, uint32_t b) { if (BS (a) == BS (b)) return 1; - return 0; + return 2; } int foo4 (uint32_t a, uint32_t b) { if (BS (a) != BS (b)) return 1; - return 0; + return 2; } /* { dg-final { scan-rtl-dump-not "bswapsi" "combine" } } */ diff --git a/gcc/testsuite/gcc.dg/builtin-bswap-7.c b/gcc/testsuite/gcc.dg/builtin-bswap-7.c index 399b825..0eecdd8 100644 --- a/gcc/testsuite/gcc.dg/builtin-bswap-7.c +++ b/gcc/testsuite/gcc.dg/builtin-bswap-7.c @@ -3,6 +3,10 @@ /* { dg-require-effective-target lp64 } */ /* { dg-options "-O -fdump-rtl-combine" } */ +/* The test intentionally returns 1/2 instead of the obvious 0/1 to + prevent GCC from calculating the return value with arithmetic + instead of a comparison. */ + #include <stdint.h> #define BS(X) __builtin_bswap64(X) @@ -11,28 +15,28 @@ int foo1 (uint64_t a) { if (BS (a) == 0xA00000000) return 1; - return 0; + return 2; } int foo2 (uint64_t a) { if (BS (a) != 0xA00000000) return 1; - return 0; + return 2; } int foo3 (uint64_t a, uint64_t b) { if (BS (a) == BS (b)) return 1; - return 0; + return 2; } int foo4 (uint64_t a, uint64_t b) { if (BS (a) != BS (b)) return 1; - return 0; + return 2; } /* { dg-final { scan-rtl-dump-not "bswapdi" "combine" } } */ |