1; RUN: opt -loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S < %s \ 2; RUN: | FileCheck %s 3 4; Check that definitions used outside the loop are handled correctly: (1) they 5; are not dropped (2) when version the loop, a phi is added to merge the value 6; from the non-distributed loop and the distributed loop. 7; 8; for (i = 0; i < n; i++) { 9; A[i + 1] = A[i] * B[i]; 10; ========================== 11; sum += C[i]; 12; } 13 14target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 15target triple = "x86_64-apple-macosx10.10.0" 16 17@B = common global i32* null, align 8 18@A = common global i32* null, align 8 19@C = common global i32* null, align 8 20@D = common global i32* null, align 8 21@E = common global i32* null, align 8 22@SUM = common global i32 0, align 8 23 24define void @f() { 25entry: 26 %a = load i32*, i32** @A, align 8 27 %b = load i32*, i32** @B, align 8 28 %c = load i32*, i32** @C, align 8 29 %d = load i32*, i32** @D, align 8 30 %e = load i32*, i32** @E, align 8 31 32 br label %for.body 33 34; CHECK: for.body.ldist1: 35; CHECK: %mulA.ldist1 = mul i32 %loadB.ldist1, %loadA.ldist1 36; CHECK: for.body.ph: 37; CHECK: for.body: 38; CHECK: %sum_add = add nuw nsw i32 %sum, %loadC 39; CHECK: for.end.loopexit: 40; CHECK: %sum_add.lver.ph = phi i32 [ %sum_add.lver.orig, %for.body.lver.orig ] 41; CHECK: for.end.loopexit6: 42; CHECK: %sum_add.lver.ph7 = phi i32 [ %sum_add, %for.body ] 43; CHECK: for.end: 44; CHECK: %sum_add.lver = phi i32 [ %sum_add.lver.ph, %for.end.loopexit ], [ %sum_add.lver.ph7, %for.end.loopexit6 ] 45 46for.body: ; preds = %for.body, %entry 47 %ind = phi i64 [ 0, %entry ], [ %add, %for.body ] 48 %sum = phi i32 [ 0, %entry ], [ %sum_add, %for.body ] 49 50 %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind 51 %loadA = load i32, i32* %arrayidxA, align 4 52 53 %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind 54 %loadB = load i32, i32* %arrayidxB, align 4 55 56 %mulA = mul i32 %loadB, %loadA 57 58 %add = add nuw nsw i64 %ind, 1 59 %arrayidxA_plus_4 = getelementptr inbounds i32, i32* %a, i64 %add 60 store i32 %mulA, i32* %arrayidxA_plus_4, align 4 61 62 %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind 63 %loadC = load i32, i32* %arrayidxC, align 4 64 65 %sum_add = add nuw nsw i32 %sum, %loadC 66 67 %exitcond = icmp eq i64 %add, 20 68 br i1 %exitcond, label %for.end, label %for.body 69 70for.end: ; preds = %for.body 71 store i32 %sum_add, i32* @SUM, align 4 72 ret void 73} 74