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| author | Adrian Straetling <straetling@de.ibm.com> | 2005-10-12 20:30:46 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2005-10-12 20:30:46 +0000 |
| commit | 8adac33500f774ff06f2900186eb09b42cb5e9c5 (patch) | |
| tree | 7660ea507d7f2bb6251942eadcbc1293734cb064 /gcc | |
| parent | 949d5b72e23ff9df61d122d367bbf334b9004f46 (diff) | |
| download | gcc-8adac33500f774ff06f2900186eb09b42cb5e9c5.zip gcc-8adac33500f774ff06f2900186eb09b42cb5e9c5.tar.gz gcc-8adac33500f774ff06f2900186eb09b42cb5e9c5.tar.bz2 | |
combine.c (make_extraction): Correct offset computation.
* combine.c (make_extraction): Correct offset computation.
* gcc.c-torture/execute/20051012-1.c: New test.
From-SVN: r105330
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/combine.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/20051012-1.c | 24 |
4 files changed, 35 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 93da687..f2b9db3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2005-10-12 Adrian Straetling <straetling@de.ibm.com> + + * combine.c (make_extraction): Correct offset computation. + 2005-10-12 Hans-Peter Nilsson <hp@axis.com> * config/cris/t-linux (LIMITS_H_TEST): Define. diff --git a/gcc/combine.c b/gcc/combine.c index 3be34e4..ff10663 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6512,11 +6512,12 @@ make_extraction (enum machine_mode mode, rtx inner, HOST_WIDE_INT pos, offset -= GET_MODE_SIZE (is_mode) - GET_MODE_SIZE (inner_mode); /* If this is a constant position, we can move to the desired byte. - Be careful not to go beyond the original object. */ + Be careful not to go beyond the original object and maintain the + natural alignment of the memory. */ if (pos_rtx == 0) { enum machine_mode bfmode = smallest_mode_for_size (len, MODE_INT); - offset += pos / GET_MODE_BITSIZE (bfmode); + offset += (pos / GET_MODE_BITSIZE (bfmode)) * GET_MODE_SIZE (bfmode); pos %= GET_MODE_BITSIZE (bfmode); } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 7abf169..be34d21 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2005-10-12 Adrian Straetling <straetling@de.ibm.com> + + * gcc.c-torture/execute/20051012-1.c: New test. + 2005-10-12 Paul Thomas <pault@gcc.gnu.org> PR fortran/18082 diff --git a/gcc/testsuite/gcc.c-torture/execute/20051012-1.c b/gcc/testsuite/gcc.c-torture/execute/20051012-1.c new file mode 100644 index 0000000..f12f429 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/20051012-1.c @@ -0,0 +1,24 @@ +extern void abort (void); + +struct type +{ + int *a; + + int b:16; + unsigned int p:9; +} t; + +unsigned int +foo () +{ + return t.p; +} + +int +main (void) +{ + t.p = 8; + if (foo (t) != 8) + abort (); + return 0; +} |