+2007-10-08 Mark Shinwell <shinwell@codesourcery.com>
+
+ * combine.c (setup_incoming_promotions): Ensure that
+ arguments that have not undergone mode promotions do not
+ incorrectly get marked as being sign- or zero-extended.
+
2007-10-08 Richard Guenther <rguenther@suse.de>
PR middle-end/33693
/* Eliminate sign extensions in the callee when possible. Only
do this when:
- (a) the mode of the register is the same as the mode of
+ (a) a mode promotion has occurred;
+ (b) the mode of the register is the same as the mode of
the argument as it is passed; and
- (b) the signedness does not change across any of the promotions; and
- (c) when no language-level promotions (which we cannot guarantee
+ (c) the signedness does not change across any of the promotions; and
+ (d) when no language-level promotions (which we cannot guarantee
will have been done by an external caller) are necessary,
unless we know that this function is only ever called from
the current compilation unit -- all of whose call sites will
do the mode1 --> mode2 promotion. */
- if (mode3 == mode4
+ if (mode1 != mode3
+ && mode3 == mode4
&& uns1 == uns3
&& (mode1 == mode2 || strictly_local))
{