Cannot select v4i32 = BUILD_VECTOR error from short program

[llvmbot]

Bugzilla Link	11318
Resolution	FIXED
Resolved on	Nov 07, 2011 16:51
Version	trunk
OS	All
Attachments	test case
Reporter	LLVM Bugzilla Contributor
CC	@efriedma-quic,@sunfishcode

Extended Description

With the attached short program, I'm seeing:

% llc bugpoint-reduced-simplified.ll -mattr=+avx
LLVM ERROR: Cannot select: 0x7f906a839110: v4i32 = BUILD_VECTOR 0x7f906a832710, 0x7f906a832710, 0x7f906a832710, 0x7f906a832710 [ID=10]
0x7f906a832710: i32 = Constant<15> [ORD=2] [ID=1]
0x7f906a832710: i32 = Constant<15> [ORD=2] [ID=1]
0x7f906a832710: i32 = Constant<15> [ORD=2] [ID=1]
0x7f906a832710: i32 = Constant<15> [ORD=2] [ID=1]
%

Some bisecting reveals that this is a regression introduced in this commit:

Author: Dan Gohman gohman@apple.com
Date: Thu Nov 3 21:49:52 2011 +0000

Reapply r143206, with fixes. Disallow physical register lifetimes
across calls, and only check for nested dependences on the special
call-sequence-resource register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143660 91177308-0d34-0410-b5e6-96231b3b80d8

[efriedma-quic]

r144034.