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[Bug bootstrap/78390] [7 Regression] Bootstrap failure: match.pd: cannot determine type of operand
- From: "matz at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 Nov 2016 13:59:36 +0000
- Subject: [Bug bootstrap/78390] [7 Regression] Bootstrap failure: match.pd: cannot determine type of operand
- Auto-submitted: auto-generated
- References: <bug-78390-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78390
--- Comment #16 from Michael Matz <matz at gcc dot gnu.org> ---
Uhh:
Successfully matched this instruction:
(set (subreg:DI (reg:SI 73) 0)
- (lshiftrt:DI (reg/v:DI 63 [ X ])
- (const_int 56 [0x38])))
+ (zero_extract:DI (reg/v:DI 63 [ X ])
+ (const_int 32 [0x20])
+ (const_int -24 [0xffffffffffffffe8])))
allowing combination of insns 22 and 23
original costs 4 + 4 = 8
replacement cost 4
deferring deletion of insn with uid = 22.
-modifying insn i3 23: r73:SI#0=r63:DI 0>>0x38
+modifying insn i3 23: r73:SI#0=zero_extract(r63:DI,0x20,0xffffffffffffffe8)
Note the "-24" for the position of the extract!