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[LV][DebugInfo] Set DL to the middle block Icmp instruction 

Reviewers: hsaito

Differential Revision: https://reviews.llvm.org/D49746

llvm-svn: 338106
This commit is contained in:
Anastasis Grammenos 2018-07-27 07:12:44 +00:00
parent 05277170a4
commit 03948d0e0f
2 changed files with 36 additions and 1 deletions
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4
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
View File

@ -2948,9 +2948,11 @@ BasicBlock *InnerLoopVectorizer::createVectorizedLoopSkeleton() {
// Add a check in the middle block to see if we have completed
// all of the iterations in the first vector loop.
// If (N - N%VF) == N, then we *don't* need to run the remainder.
Value *CmpN =
CmpInst *CmpN =
CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_EQ, Count,
CountRoundDown, "cmp.n", MiddleBlock->getTerminator());
// Copy the DL from loop start location to the check.
CmpN->setDebugLoc(OrigLoop->getStartLoc());
ReplaceInstWithInst(MiddleBlock->getTerminator(),
BranchInst::Create(ExitBlock, ScalarPH, CmpN));

33
llvm/test/Transforms/LoopVectorize/debugloc-skeleton.ll Normal file
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@ -0,0 +1,33 @@
; RUN: opt -S -debugify -loop-vectorize -force-vector-width=2 -force-vector-interleave=1 < %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
; Test that the new vectorized loop has proper debug location.
define i32 @vect(i32* %a) {
entry:
br label %for.body
; CHECK-LABEL: vector.body:
; CHECK: [[index:%.*]] = phi i64 {{.*}}, !dbg ![[line2:[0-9]+]]
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%red.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%add = add nsw i32 %0, %red.05
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 255
br i1 %exitcond, label %for.end, label %for.body
; CHECK-LABEL: middle.block:
; CHECK: %cmp.n = icmp {{.*}}, !dbg ![[line1:[0-9]+]]
; CHECK: br i1 %cmp.n, {{.*}}, !dbg ![[line1]]
for.end:
ret i32 %add
}
; CHECK: ![[line1]] = !DILocation(line: 1
; CHECK: ![[line2]] = !DILocation(line: 2