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[LoopDataPrefetch] Make it testable with opt 

Summary:
Since this is an IR pass it's nice to be able to write tests without
llc.  This is the counterpart of the llc test under
CodeGen/PowerPC/loop-data-prefetch.ll.

Reviewers: hfinkel

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D17464

llvm-svn: 261578
This commit is contained in:
Adam Nemet 2016-02-22 21:41:22 +00:00
parent d84f600653
commit fb31d580ea
4 changed files with 29 additions and 0 deletions
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1
llvm/include/llvm/InitializePasses.h
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@ -163,6 +163,7 @@ void initializeLiveStacksPass(PassRegistry&);
void initializeLiveVariablesPass(PassRegistry&);
void initializeLoaderPassPass(PassRegistry&);
void initializeLocalStackSlotPassPass(PassRegistry&);
void initializeLoopDataPrefetchPass(PassRegistry&);
void initializeLoopPassPass(PassRegistry&);
void initializeLoopDeletionPass(PassRegistry&);
void initializeLoopExtractorPass(PassRegistry&);

1
llvm/lib/Transforms/Scalar/Scalar.cpp
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@ -47,6 +47,7 @@ void llvm::initializeScalarOpts(PassRegistry &Registry) {
initializeIndVarSimplifyPass(Registry);
initializeJumpThreadingPass(Registry);
initializeLICMPass(Registry);
initializeLoopDataPrefetchPass(Registry);
initializeLoopDeletionPass(Registry);
initializeLoopAccessAnalysisPass(Registry);
initializeLoopInstSimplifyPass(Registry);

25
llvm/test/Transforms/LoopDataPrefetch/PowerPC/basic.ll Normal file
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@ -0,0 +1,25 @@
; RUN: opt -mcpu=a2 -loop-data-prefetch -S < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-bgq-linux"
define void @foo(double* nocapture %a, double* nocapture readonly %b) {
entry:
br label %for.body
; CHECK: for.body:
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %b, i64 %indvars.iv
; CHECK: call void @llvm.prefetch
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %a, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 1600
br i1 %exitcond, label %for.end, label %for.body
; CHECK: for.end:
for.end: ; preds = %for.body
ret void
}

2
llvm/test/Transforms/LoopDataPrefetch/PowerPC/lit.local.cfg Normal file
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@ -0,0 +1,2 @@
if not 'PowerPC' in config.root.targets:
config.unsupported = True