llvm-6502/x86_64-mul-by-const.ll at d727343a407bd3056f93e96c60eee72725d458c8 - llvm-6502 - Applefritter: Git

6502/llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-16 00:33:10 +00:00

Dale Johannesen f5daf8bb7f Add a transform to DAG Combiner. This improves the

code for the case where 32-bit divide by constant is
turned into 64-bit multiply by constant.  8771012.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122090 91177308-0d34-0410-b5e6-96231b3b80d8

2010-12-17 21:45:49 +00:00

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 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
 ; Formerly there were two shifts.  8771012.
 define i32 @f9188_mul365384439_shift27(i32 %A) nounwind {
 ; CHECK:  imulq $365384439,
 ; CHECK:  shrq  $59, %rax
         %tmp1 = udiv i32 %A, 1577682821         ; <i32> [#uses=1]
         ret i32 %tmp1
 }