mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
9413bdd7d5
This change adds an option disable-lftr to be able to disable Linear Function Test Replace optimization. By default option is off so current behavior is not changed. Reviewers: reames, sanjoy, wmi, andreadb, apilipenko Reviewed By: sanjoy Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D33979 llvm-svn: 305055
29 lines
844 B
LLVM
29 lines
844 B
LLVM
; LFTR should not eliminate the need for the computation of i*i completely
|
|
; due to LFTR is disabled.
|
|
; RUN: opt < %s -indvars -dce -disable-lftr -S | FileCheck %s
|
|
|
|
; Provide legal integer types.
|
|
target datalayout = "n8:16:32:64"
|
|
|
|
|
|
@A = external global i32 ; <i32*> [#uses=1]
|
|
|
|
define i32 @quadratic_setlt() {
|
|
; CHECK-LABEL: @quadratic_setlt(
|
|
; CHECK: mul
|
|
entry:
|
|
br label %loop
|
|
|
|
loop: ; preds = %loop, %entry
|
|
%i = phi i32 [ 7, %entry ], [ %i.next, %loop ] ; <i32> [#uses=5]
|
|
%i.next = add i32 %i, 1 ; <i32> [#uses=1]
|
|
store i32 %i, i32* @A
|
|
%i2 = mul i32 %i, %i ; <i32> [#uses=1]
|
|
%c = icmp slt i32 %i2, 1000 ; <i1> [#uses=1]
|
|
br i1 %c, label %loop, label %loopexit
|
|
|
|
loopexit: ; preds = %loop
|
|
ret i32 %i
|
|
}
|
|
|