llvm/test/Transforms/LoopStrengthReduce/nested-reduce.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

50 lines
2.4 KiB
LLVM

; RUN: opt < %s -loop-reduce -S | not grep mul
; Make sure we don't get a multiply by 6 in this loop.
define i32 @foo(i32 %A, i32 %B, i32 %C, i32 %D) {
entry:
%tmp.5 = icmp sgt i32 %C, 0 ; <i1> [#uses=1]
%tmp.25 = and i32 %A, 1 ; <i32> [#uses=1]
br label %loopentry.1
loopentry.1: ; preds = %loopexit.1, %entry
%indvar20 = phi i32 [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <i32> [#uses=2]
%k.1 = phi i32 [ 0, %entry ], [ %k.1.3, %loopexit.1 ] ; <i32> [#uses=2]
br i1 %tmp.5, label %no_exit.1.preheader, label %loopexit.1
no_exit.1.preheader: ; preds = %loopentry.1
%i.0.0 = bitcast i32 %indvar20 to i32 ; <i32> [#uses=1]
%tmp.9 = mul i32 %i.0.0, 6 ; <i32> [#uses=1]
br label %no_exit.1.outer
no_exit.1.outer: ; preds = %cond_true, %no_exit.1.preheader
%k.1.2.ph = phi i32 [ %k.1, %no_exit.1.preheader ], [ %k.09, %cond_true ] ; <i32> [#uses=2]
%j.1.2.ph = phi i32 [ 0, %no_exit.1.preheader ], [ %inc.1, %cond_true ] ; <i32> [#uses=1]
br label %no_exit.1
no_exit.1: ; preds = %cond_continue, %no_exit.1.outer
%indvar.ui = phi i32 [ 0, %no_exit.1.outer ], [ %indvar.next, %cond_continue ] ; <i32> [#uses=2]
%indvar = bitcast i32 %indvar.ui to i32 ; <i32> [#uses=1]
%j.1.2 = add i32 %indvar, %j.1.2.ph ; <i32> [#uses=2]
%tmp.11 = add i32 %j.1.2, %tmp.9 ; <i32> [#uses=1]
%tmp.12 = trunc i32 %tmp.11 to i8 ; <i8> [#uses=1]
%shift.upgrd.1 = zext i8 %tmp.12 to i32 ; <i32> [#uses=1]
%tmp.13 = shl i32 %D, %shift.upgrd.1 ; <i32> [#uses=2]
%tmp.15 = icmp eq i32 %tmp.13, %B ; <i1> [#uses=1]
%inc.1 = add i32 %j.1.2, 1 ; <i32> [#uses=3]
br i1 %tmp.15, label %cond_true, label %cond_continue
cond_true: ; preds = %no_exit.1
%tmp.26 = and i32 %tmp.25, %tmp.13 ; <i32> [#uses=1]
%k.09 = add i32 %tmp.26, %k.1.2.ph ; <i32> [#uses=2]
%tmp.517 = icmp slt i32 %inc.1, %C ; <i1> [#uses=1]
br i1 %tmp.517, label %no_exit.1.outer, label %loopexit.1
cond_continue: ; preds = %no_exit.1
%tmp.519 = icmp slt i32 %inc.1, %C ; <i1> [#uses=1]
%indvar.next = add i32 %indvar.ui, 1 ; <i32> [#uses=1]
br i1 %tmp.519, label %no_exit.1, label %loopexit.1
loopexit.1: ; preds = %cond_continue, %cond_true, %loopentry.1
%k.1.3 = phi i32 [ %k.1, %loopentry.1 ], [ %k.09, %cond_true ], [ %k.1.2.ph, %cond_continue ] ; <i32> [#uses=2]
%indvar.next21 = add i32 %indvar20, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next21, 4 ; <i1> [#uses=1]
br i1 %exitcond, label %loopexit.0, label %loopentry.1
loopexit.0: ; preds = %loopexit.1
ret i32 %k.1.3
}