diff options
| author | uweigand <uweigand@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-02-17 22:07:51 +0000 |
|---|---|---|
| committer | uweigand <uweigand@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-02-17 22:07:51 +0000 |
| commit | ed869d6569bc24ab5007b946d3e2be6f8fec1761 (patch) | |
| tree | 89b22e8b379997542e1eaaf88a11e7c7254da0c8 /gcc | |
| parent | 1ce7df12fc46339f7b3ae914bbb7f719320cb13b (diff) | |
| download | gcc-ed869d6569bc24ab5007b946d3e2be6f8fec1761.tar.gz | |
ChangeLog:
* combine.c (simplify_if_then_else): Do not replace
(if_then_else (ne reg 0) (0) (const_int)) by (reg) if the
modes differ.
testsuite/ChangeLog:
* gcc.dg/20040217-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@77988 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/20040217-1.c | 19 |
4 files changed, 30 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5ece10cfede..700cccd81c8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2004-02-17 Ulrich Weigand <uweigand@de.ibm.com> + + * combine.c (simplify_if_then_else): Do not replace + (if_then_else (ne reg 0) (0) (const_int)) by (reg) if the + modes differ. + 2004-02017 Steven Bosscher <stevenb@suse.de> * (c-decl.c, c-semantics.c, calls.c, cgraph.c, cgraphunit.c, diff --git a/gcc/combine.c b/gcc/combine.c index 14cd64b1e69..3cf8ae076f1 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4930,6 +4930,7 @@ simplify_if_then_else (rtx x) /* (IF_THEN_ELSE (NE REG 0) (0) (8)) is REG for nonzero_bits (REG) == 8. */ if (true_code == NE && XEXP (cond, 1) == const0_rtx && false_rtx == const0_rtx && GET_CODE (true_rtx) == CONST_INT + && GET_MODE (XEXP (cond, 0)) == mode && (INTVAL (true_rtx) & GET_MODE_MASK (mode)) == nonzero_bits (XEXP (cond, 0), mode) && (i = exact_log2 (INTVAL (true_rtx) & GET_MODE_MASK (mode))) >= 0) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 1e39c0e75f2..52863b0e859 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2004-02-17 Ulrich Weigand <uweigand@de.ibm.com> + + * gcc.dg/20040217-1.c: New test. + 2004-02-17 Zack Weinberg <zack@codesourcery.com> * gcc.c-torture/execute/990208-1.x: Delete. diff --git a/gcc/testsuite/gcc.dg/20040217-1.c b/gcc/testsuite/gcc.dg/20040217-1.c new file mode 100644 index 00000000000..7ca7388fe7c --- /dev/null +++ b/gcc/testsuite/gcc.dg/20040217-1.c @@ -0,0 +1,19 @@ +/* This used to ICE on s390x due to a bug in simplify_if_then_else. */ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ + +extern void use (int); +void test (void) +{ + union + { + unsigned long ul; + signed char sc; + } u; + + u.sc = 8; + u.sc &= 25; + + use (u.sc); +} + |