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| -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); |