shift-factor.ll
504 Bytes
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
; There should be exactly one shift and one add left.
define i32 @test1(i32 %X, i32 %Y) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[REASS_ADD:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[REASS_MUL:%.*]] = shl i32 [[REASS_ADD]], 1
; CHECK-NEXT: ret i32 [[REASS_MUL]]
;
%t2 = shl i32 %X, 1
%t6 = shl i32 %Y, 1
%t4 = add i32 %t6, %t2
ret i32 %t4
}