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| author | Richard Biener <rguenther@suse.de> | 2016-05-13 12:27:18 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-05-13 12:27:18 +0000 |
| commit | 8ab3bdac33672a2ec681e8d57869830fdcaffd0e (patch) | |
| tree | 96009fea42a0010c478452c737b7da940e24955b /gcc/testsuite | |
| parent | 310aba3bbe9b1e053ec90d92ed5a58d24cde3b85 (diff) | |
| download | gcc-8ab3bdac33672a2ec681e8d57869830fdcaffd0e.zip gcc-8ab3bdac33672a2ec681e8d57869830fdcaffd0e.tar.gz gcc-8ab3bdac33672a2ec681e8d57869830fdcaffd0e.tar.bz2 | |
re PR tree-optimization/42587 (bswap not recognized for memory)
2016-05-13 Richard Biener <rguenther@suse.de>
PR tree-optimization/42587
* tree-ssa-math-opts.c (perform_symbolic_merge): Handle BIT_FIELD_REF.
(find_bswap_or_nop_1): Likewise.
(bswap_replace): Likewise.
* gcc.dg/optimize-bswapsi-4.c: New testcase.
From-SVN: r236204
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/optimize-bswapsi-4.c | 28 |
2 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index a27da97..57b7580 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-05-13 Richard Biener <rguenther@suse.de> + + PR tree-optimization/42587 + * gcc.dg/optimize-bswapsi-4.c: New testcase. + 2016-05-13 Martin Liska <mliska@suse.cz> * g++.dg/tree-ssa/ivopts-3.C: Change test-case to follow diff --git a/gcc/testsuite/gcc.dg/optimize-bswapsi-4.c b/gcc/testsuite/gcc.dg/optimize-bswapsi-4.c new file mode 100644 index 0000000..a298486 --- /dev/null +++ b/gcc/testsuite/gcc.dg/optimize-bswapsi-4.c @@ -0,0 +1,28 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target bswap32 } */ +/* { dg-options "-O2 -fdump-tree-bswap" } */ +/* { dg-additional-options "-march=z900" { target s390-*-* } } */ + +typedef unsigned char u8; +typedef unsigned int u32; +union __anonunion +{ + u32 value; + u8 bytes[4]; +}; + +u32 +acpi_ut_dword_byte_swap (u32 value) +{ + union __anonunion in; + in.value = value; +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + return ((in.bytes[0] << 24) | (in.bytes[1] << 16) + | (in.bytes[2] << 8) | in.bytes[3]); +#else + return ((in.bytes[3] << 24) | (in.bytes[2] << 16) + | (in.bytes[1] << 8) | in.bytes[0]); +#endif +} + +/* { dg-final { scan-tree-dump "32 bit bswap implementation found at" "bswap" } } */ |