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|
; REQUIRES: asserts
; RUN: opt < %s -basicaa -loop-interchange -pass-remarks-missed='loop-interchange' -pass-remarks-output=%t -S \
; RUN: -verify-dom-info -verify-loop-info -stats 2>&1 | FileCheck -check-prefix=STATS %s
; RUN: FileCheck --input-file=%t %s
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
declare void @foo(i64 %a)
declare void @bar(i64 %a) readnone
;;--------------------------------------Test case 01------------------------------------
;; Not safe to interchange, because the called function `foo` is not marked as
;; readnone, so it could introduce dependences.
;;
;; for(int i=0;i<100;i++) {
;; for(int j=1;j<100;j++) {
;; foo(i);
;; A[j][i] = A[j][i]+k;
;; }
;; }
; CHECK: --- !Missed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: CallInst
; CHECK-NEXT: Function: interchange_01
; CHECK-NEXT: Args:
; CHECK-NEXT - String: Cannot interchange loops due to call instruction.
define void @interchange_01(i32 %k) {
entry:
br label %for1.header
for1.header:
%indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc10 ]
br label %for2
for2:
%indvars.iv = phi i64 [ %indvars.iv.next, %for2 ], [ 1, %for1.header ]
call void @foo(i64 %indvars.iv23)
%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv, i64 %indvars.iv23
%lv = load i32, i32* %arrayidx5
%add = add nsw i32 %lv, %k
store i32 %add, i32* %arrayidx5
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 99
br i1 %exitcond, label %for2.loopexit , label %for2
for2.loopexit:
br label %for1.inc10
for1.inc10:
%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
%exitcond26 = icmp eq i64 %indvars.iv23, 99
br i1 %exitcond26, label %for1.loopexit, label %for1.header
for1.loopexit:
br label %exit
exit:
ret void
}
;;--------------------------------------Test case 02------------------------------------
;; Safe to interchange, because the called function `bar` is marked as readnone,
;; so it cannot introduce dependences.
;;
;; for(int i=0;i<100;i++) {
;; for(int j=1;j<100;j++) {
;; bar(i);
;; A[j][i] = A[j][i]+k;
;; }
;; }
; CHECK: --- !Passed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: Interchanged
; CHECK-NEXT: Function: interchange_02
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: Loop interchanged with enclosing loop.
; CHECK-NEXT: ...
define void @interchange_02(i32 %k) {
entry:
br label %for1.header
for1.header:
%indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc10 ]
br label %for2
for2:
%indvars.iv = phi i64 [ %indvars.iv.next, %for2 ], [ 1, %for1.header ]
call void @bar(i64 %indvars.iv23)
%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv, i64 %indvars.iv23
%lv = load i32, i32* %arrayidx5
%add = add nsw i32 %lv, %k
store i32 %add, i32* %arrayidx5
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 99
br i1 %exitcond, label %for2.loopexit , label %for2
for2.loopexit:
br label %for1.inc10
for1.inc10:
%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
%exitcond26 = icmp eq i64 %indvars.iv23, 99
br i1 %exitcond26, label %for1.loopexit, label %for1.header
for1.loopexit:
br label %exit
exit:
ret void
}
; Check stats, we interchanged 1 out of 2 loops.
; STATS: 1 loop-interchange - Number of loops interchanged
|
