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| author | Richard Earnshaw <rearnsha@arm.com> | 2002-03-07 10:39:50 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2002-03-07 10:39:50 +0000 |
| commit | 145d3bf292a6cfc66a6396285003765db9424a8f (patch) | |
| tree | 8c0ed81874619fdf665ae27cb2b965066b1df37d /gcc | |
| parent | 50cb1e208d8e7f3f23819f3a70ba9c7c3a806fac (diff) | |
| download | gcc-145d3bf292a6cfc66a6396285003765db9424a8f.zip gcc-145d3bf292a6cfc66a6396285003765db9424a8f.tar.gz gcc-145d3bf292a6cfc66a6396285003765db9424a8f.tar.bz2 | |
combine.c (simplify_comparison): If simplifying a logical shift right and compare with constant...
* combine.c (simplify_comparison): If simplifying a logical shift
right and compare with constant, force the comparison to unsigned.
From-SVN: r50400
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 555d2ff..6def670 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-03-07 Richard Earnshaw <rearnsha@arm.com> + + * combine.c (simplify_comparison): If simplifying a logical shift + right and compare with constant, force the comparison to unsigned. + 2002-03-07 Aldy Hernandez <aldyh@redhat.com> * doc/invoke.texi: Add documentation for -mabi=no-altivec. diff --git a/gcc/combine.c b/gcc/combine.c index 733ce27..a155555 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -10885,6 +10885,11 @@ simplify_comparison (code, pop0, pop1) || (floor_log2 (const_op) + INTVAL (XEXP (op0, 1)) < mode_width))) { + /* If the shift was logical, then we must make the condition + unsigned. */ + if (GET_CODE (op0) == LSHIFTRT) + code = unsigned_condition (code); + const_op <<= INTVAL (XEXP (op0, 1)); op1 = GEN_INT (const_op); op0 = XEXP (op0, 0); |