74 lines
2.6 KiB
LLVM
74 lines
2.6 KiB
LLVM
|
; RUN: opt -loop-accesses -analyze -enable-new-pm=0 < %s | FileCheck %s
|
||
|
|
; RUN: opt -passes='require<scalar-evolution>,require<aa>,loop(print-access-info)' -disable-output < %s 2>&1 | FileCheck %s
|
||
|
|
|
||
|
|
; Analyze this loop:
|
||
|
|
; for (i = 0; i < n; i++)
|
||
|
|
; A[i + 1] = A[i] * B[i] * C[i];
|
||
|
|
|
||
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK: Has convergent operation in loop
|
||
|
|
; CHECK: Report: cannot add control dependency to convergent operation
|
||
|
|
; CHECK-NEXT: Dependences:
|
||
|
|
; CHECK-NEXT: Backward:
|
||
|
|
; CHECK-NEXT: %loadA = load i16, i16* %arrayidxA, align 2 ->
|
||
|
|
; CHECK-NEXT: store i16 %mul1, i16* %arrayidxA_plus_2, align 2
|
||
|
|
; CHECK: Run-time memory checks:
|
||
|
|
; CHECK-NEXT: 0:
|
||
|
|
; CHECK-NEXT: Comparing group
|
||
|
|
; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
|
||
|
|
; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
|
||
|
|
; CHECK-NEXT: Against group
|
||
|
|
; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
|
||
|
|
; CHECK-NEXT: 1:
|
||
|
|
; CHECK-NEXT: Comparing group
|
||
|
|
; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
|
||
|
|
; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
|
||
|
|
; CHECK-NEXT: Against group
|
||
|
|
; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
|
||
|
|
|
||
|
|
@B = common global i16* null, align 8
|
||
|
|
@A = common global i16* null, align 8
|
||
|
|
@C = common global i16* null, align 8
|
||
|
|
|
||
|
|
define void @f() #1 {
|
||
|
|
entry:
|
||
|
|
%a = load i16*, i16** @A, align 8
|
||
|
|
%b = load i16*, i16** @B, align 8
|
||
|
|
%c = load i16*, i16** @C, align 8
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body: ; preds = %for.body, %entry
|
||
|
|
%storemerge3 = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
||
|
|
|
||
|
|
%arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
|
||
|
|
%loadA = load i16, i16* %arrayidxA, align 2
|
||
|
|
|
||
|
|
%arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
|
||
|
|
%loadB = load i16, i16* %arrayidxB, align 2
|
||
|
|
|
||
|
|
%arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
|
||
|
|
%loadC = load i16, i16* %arrayidxC, align 2
|
||
|
|
|
||
|
|
call void @llvm.convergent()
|
||
|
|
|
||
|
|
%mul = mul i16 %loadB, %loadA
|
||
|
|
%mul1 = mul i16 %mul, %loadC
|
||
|
|
|
||
|
|
%add = add nuw nsw i64 %storemerge3, 1
|
||
|
|
%arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
|
||
|
|
store i16 %mul1, i16* %arrayidxA_plus_2, align 2
|
||
|
|
|
||
|
|
%exitcond = icmp eq i64 %add, 20
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.body
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.convergent() #0
|
||
|
|
|
||
|
|
attributes #0 = { nounwind readnone convergent }
|
||
|
|
attributes #1 = { nounwind convergent }
|