llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-30 19:35:54 +00:00

History

Serge Pavlov ea0ea63773 Recognize test for overflow in integer multiplication.

If multiplication involves zero-extended arguments and the result is
compared as in the patterns:

    %mul32 = trunc i64 %mul64 to i32
    %zext = zext i32 %mul32 to i64
    %overflow = icmp ne i64 %mul64, %zext
or
    %overflow = icmp ugt i64 %mul64 , 0xffffffff

then the multiplication may be replaced by call to umul.with.overflow.
This change fixes PR4917 and PR4918.

Differential Revision: http://llvm-reviews.chandlerc.com/D2814


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206137 91177308-0d34-0410-b5e6-96231b3b80d8

2014-04-13 18:23:41 +00:00

Analysis

in findGCD of multiply expr return the gcd

2014-04-08 21:21:05 +00:00

Assembler

…

Bindings

…

Bitcode

AsmParser: add a warning for compatibility parsing

2014-04-05 22:42:53 +00:00

BugPoint