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| author | Jakub Jelinek <jakub@redhat.com> | 2001-12-20 09:26:20 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2001-12-20 09:26:20 +0100 |
| commit | a9dc868ffb3fb50e9214823c322cab7c6cf72e30 (patch) | |
| tree | ea0ef2f6d06f6f68479430c907804e9f4ea87dd4 | |
| parent | 2a3b43b609ca4f3850226eecb5fec29f1ab80d35 (diff) | |
| download | gcc-a9dc868ffb3fb50e9214823c322cab7c6cf72e30.zip gcc-a9dc868ffb3fb50e9214823c322cab7c6cf72e30.tar.gz gcc-a9dc868ffb3fb50e9214823c322cab7c6cf72e30.tar.bz2 | |
simplify-rtx.c (simplifi_binary_operation): If DIV has narrower mode than op0, only return the bits in DIV's mode.
* simplify-rtx.c (simplifi_binary_operation) [DIV]: If DIV has
narrower mode than op0, only return the bits in DIV's mode.
* gcc.c-torture/compile/20011219-2.c: New test.
From-SVN: r48199
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/20011219-2.c | 20 |
4 files changed, 31 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f1634cc..0f25ad6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2001-12-20 Jakub Jelinek <jakub@redhat.com> + * simplify-rtx.c (simplifi_binary_operation) [DIV]: If DIV has + narrower mode than op0, only return the bits in DIV's mode. + +2001-12-20 Jakub Jelinek <jakub@redhat.com> + * combine.c (distribute_notes): Avoid adding REG_LABEL notes to JUMP_INSNs with JUMP_LABEL. diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 122768e..2b25d9c 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1412,7 +1412,10 @@ simplify_binary_operation (code, mode, op0, op1) case DIV: if (trueop1 == CONST1_RTX (mode)) - return op0; + { + rtx x = gen_lowpart_common (mode, op0); + return x ? x : op0; + } /* In IEEE floating point, 0/x is not always 0. */ if ((TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index de0cdf8..aaee1d5 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,7 @@ 2001-12-20 Jakub Jelinek <jakub@redhat.com> + * gcc.c-torture/compile/20011219-2.c: New test. + * gcc.c-torture/execute/20011219-1.c: New test. 2001-12-19 David Billinghurst <David.Billinghurst@riotinto.com> diff --git a/gcc/testsuite/gcc.c-torture/compile/20011219-2.c b/gcc/testsuite/gcc.c-torture/compile/20011219-2.c new file mode 100644 index 0000000..2ad7eb1 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20011219-2.c @@ -0,0 +1,20 @@ +/* This testcase failed on Alpha at -O2 when simplifying conditional + expressions. */ + +struct S { + unsigned long a; + double b, c; +}; + +extern double bar (double, double); + +int +foo (unsigned long x, unsigned int y, struct S *z) +{ + unsigned int a = z->a; + int b = y / z->a > 1 ? y / z->a : 1; + + a = y / b < z->a ? y / b : z->a; + z->c = z->b * bar ((double) a, (double) x); + return 0; +} |