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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/53988] [SH] tst Rm,Rn not used for QI/HImode Date: Mon, 29 Dec 2014 19:03:00 -0000 [thread overview] Message-ID: <bug-53988-4-h5AEuOavU9@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-53988-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53988 Oleg Endo <olegendo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Last reconfirmed| |2014-12-29 Resolution|FIXED |--- Ever confirmed|0 |1 --- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> --- The change in r192982 results in wrong code: int test (short x, short* y, int z, int w) { return x & y[0] ? z : w; } mov.w @r5,r1 // sign extended y[0], bits[31:16] = 1 tst r4,r1 // r4 bits [31:16] undefined bf .L5 mov r7,r0 rts nop .align 1 .L5: rts mov r6,r0 The *tst<mode>_t_zero insns blindly accept subregs. They have to check whether both operands have been sign extended or at least one of them has been zero extended (to mask out the unwanted high bits).
next prev parent reply other threads:[~2014-12-29 19:03 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-07-17 0:02 [Bug target/53988] New: " olegendo at gcc dot gnu.org 2012-09-03 10:02 ` [Bug target/53988] " olegendo at gcc dot gnu.org 2012-10-31 22:09 ` olegendo at gcc dot gnu.org 2012-11-05 21:11 ` olegendo at gcc dot gnu.org 2014-12-29 19:03 ` olegendo at gcc dot gnu.org [this message] 2015-01-14 23:47 ` olegendo at gcc dot gnu.org 2015-01-19 22:36 ` olegendo at gcc dot gnu.org 2015-03-10 8:10 ` olegendo at gcc dot gnu.org 2015-03-10 8:18 ` olegendo at gcc dot gnu.org 2015-03-10 8:19 ` olegendo at gcc dot gnu.org
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