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[DebugInfo][LoopVectorize] Preserve DL in induction PHI and Add 

Differential Revision: https://reviews.llvm.org/D48968

llvm-svn: 336667
This commit is contained in:
Anastasis Grammenos 2018-07-10 13:29:50 +00:00
parent 9cc6d3b305
commit 612bf7cac5
2 changed files with 12 additions and 0 deletions
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2
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -1821,6 +1821,7 @@ void InnerLoopVectorizer::createVectorIntOrFpInductionPHI(
// factor. The last of those goes into the PHI.
PHINode *VecInd = PHINode::Create(SteppedStart->getType(), 2, "vec.ind",
&*LoopVectorBody->getFirstInsertionPt());
VecInd->setDebugLoc(EntryVal->getDebugLoc());
Instruction *LastInduction = VecInd;
for (unsigned Part = 0; Part < UF; ++Part) {
VectorLoopValueMap.setVectorValue(EntryVal, Part, LastInduction);
@ -1831,6 +1832,7 @@ void InnerLoopVectorizer::createVectorIntOrFpInductionPHI(
LastInduction = cast<Instruction>(addFastMathFlag(
Builder.CreateBinOp(AddOp, LastInduction, SplatVF, "step.add")));
LastInduction->setDebugLoc(EntryVal->getDebugLoc());
}
// Move the last step to the end of the latch block. This ensures consistent

10
llvm/test/Transforms/LoopVectorize/i8-induction.ll
View File

@ -1,4 +1,5 @@
; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S
; RUN: opt < %s -debugify -loop-vectorize -S | FileCheck %s --check-prefix=DEBUGLOC
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"
@ -6,6 +7,12 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
@b = common global i8 0, align 1
define void @f() nounwind uwtable ssp {
; Check that the induction phis and adds have debug location.
;
; DEBUGLOC-LABEL: vector.body:
; DEBUGLOC: %vec.ind = phi {{.*}}, !dbg ![[DbgLoc:[0-9]+]]
; DEBUGLOC: %vec.ind.next = add {{.*}}, !dbg ![[DbgLoc]]
scalar.ph:
store i8 0, i8* inttoptr (i64 1 to i8*), align 1
%0 = load i8, i8* @a, align 1
@ -28,3 +35,6 @@ for.end: ; preds = %for.body
store i8 %mul, i8* @b, align 1
ret void
}
; Check that the location of the new phi comes from %c.015 = phi i8
; DEBUGLOC: ![[DbgLoc]] = !DILocation(line: 5