41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; RUN: opt -basic-aa -loop-versioning -S < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
; Do not version this loop because of a convergent operation
|
|
|
|
; CHECK-LABEL: @f(
|
|
; CHECK: call i32 @llvm.convergent(
|
|
; CHECK-NOT: call i32 @llvm.convergent(
|
|
define void @f(i32* %a, i32* %b, i32* %c) #0 {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
|
|
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
%loadA = load i32, i32* %arrayidxA, align 4
|
|
|
|
%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
|
|
%loadB = load i32, i32* %arrayidxB, align 4
|
|
%convergentB = call i32 @llvm.convergent(i32 %loadB)
|
|
|
|
%mulC = mul i32 %loadA, %convergentB
|
|
|
|
%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
|
|
store i32 %mulC, i32* %arrayidxC, align 4
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
declare i32 @llvm.convergent(i32) #1
|
|
|
|
attributes #0 = { nounwind convergent }
|
|
attributes #1 = { nounwind readnone convergent }
|