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|
; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
;; We test the complete .ll for adjustment in outer loop header/latch and inner loop header/latch.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@A = common global [100 x [100 x i32]] zeroinitializer
@B = common global [100 x i32] zeroinitializer
@C = common global [100 x [100 x i32]] zeroinitializer
@D = common global [100 x [100 x [100 x i32]]] zeroinitializer
;; Loops not tightly nested are not interchanged
;; for(int j=0;j<N;j++) {
;; B[j] = j+k;
;; for(int i=0;i<N;i++)
;; A[j][i] = A[j][i]+B[j];
;; }
define void @interchange_05(i32 %k, i32 %N){
entry:
%cmp30 = icmp sgt i32 %N, 0
br i1 %cmp30, label %for.body.lr.ph, label %for.end17
for.body.lr.ph:
%0 = add i32 %N, -1
%1 = zext i32 %k to i64
br label %for.body
for.body:
%indvars.iv32 = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next33, %for.inc15 ]
%2 = add nsw i64 %indvars.iv32, %1
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* @B, i64 0, i64 %indvars.iv32
%3 = trunc i64 %2 to i32
store i32 %3, i32* %arrayidx
br label %for.body3
for.body3:
%indvars.iv = phi i64 [ 0, %for.body ], [ %indvars.iv.next, %for.body3 ]
%arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv32, i64 %indvars.iv
%4 = load i32, i32* %arrayidx7
%add10 = add nsw i32 %3, %4
store i32 %add10, i32* %arrayidx7
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv to i32
%exitcond = icmp eq i32 %lftr.wideiv, %0
br i1 %exitcond, label %for.inc15, label %for.body3
for.inc15:
%indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
%lftr.wideiv35 = trunc i64 %indvars.iv32 to i32
%exitcond36 = icmp eq i32 %lftr.wideiv35, %0
br i1 %exitcond36, label %for.end17, label %for.body
for.end17:
ret void
}
; CHECK-LABEL: @interchange_05
; CHECK: entry:
; CHECK: %cmp30 = icmp sgt i32 %N, 0
; CHECK: br i1 %cmp30, label %for.body.lr.ph, label %for.end17
; CHECK: for.body.lr.ph:
; CHECK: %0 = add i32 %N, -1
; CHECK: %1 = zext i32 %k to i64
; CHECK: br label %for.body
; CHECK: for.body:
; CHECK: %indvars.iv32 = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next33, %for.inc15 ]
; CHECK: %2 = add nsw i64 %indvars.iv32, %1
; CHECK: %arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* @B, i64 0, i64 %indvars.iv32
; CHECK: %3 = trunc i64 %2 to i32
; CHECK: store i32 %3, i32* %arrayidx
; CHECK: br label %for.body3.preheader
; CHECK: for.body3.preheader:
; CHECK: br label %for.body3
; CHECK: for.body3:
; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body3 ], [ 0, %for.body3.preheader ]
; CHECK: %arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv32, i64 %indvars.iv
; CHECK: %4 = load i32, i32* %arrayidx7
; CHECK: %add10 = add nsw i32 %3, %4
; CHECK: store i32 %add10, i32* %arrayidx7
; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; CHECK: %lftr.wideiv = trunc i64 %indvars.iv to i32
; CHECK: %exitcond = icmp eq i32 %lftr.wideiv, %0
; CHECK: br i1 %exitcond, label %for.inc15, label %for.body3
; CHECK: for.inc15:
; CHECK: %indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
; CHECK: %lftr.wideiv35 = trunc i64 %indvars.iv32 to i32
; CHECK: %exitcond36 = icmp eq i32 %lftr.wideiv35, %0
; CHECK: br i1 %exitcond36, label %for.end17.loopexit, label %for.body
; CHECK: for.end17.loopexit:
; CHECK: br label %for.end17
; CHECK: for.end17:
; CHECK: ret void
declare void @foo(...) readnone
;; Loops not tightly nested are not interchanged
;; for(int j=0;j<N;j++) {
;; foo();
;; for(int i=2;i<N;i++)
;; A[j][i] = A[j][i]+k;
;; }
define void @interchange_06(i32 %k, i32 %N) {
entry:
%cmp22 = icmp sgt i32 %N, 0
br i1 %cmp22, label %for.body.lr.ph, label %for.end12
for.body.lr.ph:
%0 = add i32 %N, -1
br label %for.body
for.body:
%indvars.iv24 = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next25, %for.inc10 ]
tail call void (...) @foo()
br label %for.body3
for.body3:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body3 ], [ 2, %for.body ]
%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv24, i64 %indvars.iv
%1 = load i32, i32* %arrayidx5
%add = add nsw i32 %1, %k
store i32 %add, i32* %arrayidx5
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv to i32
%exitcond = icmp eq i32 %lftr.wideiv, %0
br i1 %exitcond, label %for.inc10, label %for.body3
for.inc10:
%indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
%lftr.wideiv26 = trunc i64 %indvars.iv24 to i32
%exitcond27 = icmp eq i32 %lftr.wideiv26, %0
br i1 %exitcond27, label %for.end12, label %for.body
for.end12:
ret void
}
;; Here we are checking if the inner phi is not split then we have not interchanged.
; CHECK-LABEL: @interchange_06
; CHECK: phi i64 [ %indvars.iv.next, %for.body3 ], [ 2, %for.body3.preheader ]
; CHECK-NEXT: getelementptr
; CHECK-NEXT: %1 = load
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