Gitiles
Code Review Sign In
gerrit-public.fairphone.software / toolchain / llvm-project / adf23a400d107014995092db8b7b256b55b66f58 / . / llvm / test / Transforms / LoopStrengthReduce / nested-reduce.ll
blob: 58b8d3eecd030fba4a8a930bb6955533c87a0354 [file] [log] [blame]
Dan Gohman18800922009-09-11 18:01:28 +0000[diff] [blame]1; RUN: opt < %s -loop-reduce -S | not grep mul
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]2
3; Make sure we don't get a multiply by 6 in this loop.
4
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]5define i32 @foo(i32 %A, i32 %B, i32 %C, i32 %D) {
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]6entry:
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]7 %tmp.5 = icmp sgt i32 %C, 0 ; <i1> [#uses=1]
8 %tmp.25 = and i32 %A, 1 ; <i32> [#uses=1]
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]9 br label %loopentry.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]10loopentry.1: ; preds = %loopexit.1, %entry
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]11 %indvar20 = phi i32 [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <i32> [#uses=2]
12 %k.1 = phi i32 [ 0, %entry ], [ %k.1.3, %loopexit.1 ] ; <i32> [#uses=2]
13 br i1 %tmp.5, label %no_exit.1.preheader, label %loopexit.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]14no_exit.1.preheader: ; preds = %loopentry.1
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]15 %i.0.0 = bitcast i32 %indvar20 to i32 ; <i32> [#uses=1]
16 %tmp.9 = mul i32 %i.0.0, 6 ; <i32> [#uses=1]
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]17 br label %no_exit.1.outer
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]18no_exit.1.outer: ; preds = %cond_true, %no_exit.1.preheader
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]19 %k.1.2.ph = phi i32 [ %k.1, %no_exit.1.preheader ], [ %k.09, %cond_true ] ; <i32> [#uses=2]
20 %j.1.2.ph = phi i32 [ 0, %no_exit.1.preheader ], [ %inc.1, %cond_true ] ; <i32> [#uses=1]
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]21 br label %no_exit.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]22no_exit.1: ; preds = %cond_continue, %no_exit.1.outer
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]23 %indvar.ui = phi i32 [ 0, %no_exit.1.outer ], [ %indvar.next, %cond_continue ] ; <i32> [#uses=2]
24 %indvar = bitcast i32 %indvar.ui to i32 ; <i32> [#uses=1]
25 %j.1.2 = add i32 %indvar, %j.1.2.ph ; <i32> [#uses=2]
26 %tmp.11 = add i32 %j.1.2, %tmp.9 ; <i32> [#uses=1]
27 %tmp.12 = trunc i32 %tmp.11 to i8 ; <i8> [#uses=1]
28 %shift.upgrd.1 = zext i8 %tmp.12 to i32 ; <i32> [#uses=1]
29 %tmp.13 = shl i32 %D, %shift.upgrd.1 ; <i32> [#uses=2]
30 %tmp.15 = icmp eq i32 %tmp.13, %B ; <i1> [#uses=1]
31 %inc.1 = add i32 %j.1.2, 1 ; <i32> [#uses=3]
32 br i1 %tmp.15, label %cond_true, label %cond_continue
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]33cond_true: ; preds = %no_exit.1
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]34 %tmp.26 = and i32 %tmp.25, %tmp.13 ; <i32> [#uses=1]
35 %k.09 = add i32 %tmp.26, %k.1.2.ph ; <i32> [#uses=2]
36 %tmp.517 = icmp slt i32 %inc.1, %C ; <i1> [#uses=1]
37 br i1 %tmp.517, label %no_exit.1.outer, label %loopexit.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]38cond_continue: ; preds = %no_exit.1
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]39 %tmp.519 = icmp slt i32 %inc.1, %C ; <i1> [#uses=1]
40 %indvar.next = add i32 %indvar.ui, 1 ; <i32> [#uses=1]
41 br i1 %tmp.519, label %no_exit.1, label %loopexit.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]42loopexit.1: ; preds = %cond_continue, %cond_true, %loopentry.1
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]43 %k.1.3 = phi i32 [ %k.1, %loopentry.1 ], [ %k.09, %cond_true ], [ %k.1.2.ph, %cond_continue ] ; <i32> [#uses=2]
44 %indvar.next21 = add i32 %indvar20, 1 ; <i32> [#uses=2]
45 %exitcond = icmp eq i32 %indvar.next21, 4 ; <i1> [#uses=1]
46 br i1 %exitcond, label %loopexit.0, label %loopentry.1
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]47loopexit.0: ; preds = %loopexit.1
Tanya Lattnerab7872c2008-03-19 07:28:33 +0000[diff] [blame]48 ret i32 %k.1.3
Chris Lattner67315dc2005-10-30 05:14:02 +0000[diff] [blame]49}