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[PowerPC] Really iterate over all loops in PPCLoopDataPrefetch/PPCLoopPreIncPrep

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When I fixed these a couple of days ago to iterate over all loops, not just
depth == 1 loops, I inadvertently made it such that we'd only look at the first
top-level loop. Make sure that we really look at all of them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234705 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel 2015-04-12 17:18:56 +00:00
parent e0f4a11a89
commit ad96655905
3 changed files with 54 additions and 14 deletions
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10
lib/Target/PowerPC/PPCLoopDataPrefetch.cpp
View File

@ -111,13 +111,9 @@ bool PPCLoopDataPrefetch::runOnFunction(Function &F) {
bool MadeChange = false;
if (LI->empty())
return MadeChange;
for (auto I = df_begin(*LI->begin()), E = df_end(*LI->begin()); I != E; ++I) {
Loop *L = *I;
MadeChange |= runOnLoop(L);
}
for (auto I = LI->begin(), IE = LI->end(); I != IE; ++I)
for (auto L = df_begin(*I), LE = df_end(*I); L != LE; ++L)
MadeChange |= runOnLoop(*L);
return MadeChange;
}

10
lib/Target/PowerPC/PPCLoopPreIncPrep.cpp
View File

@ -144,13 +144,9 @@ bool PPCLoopPreIncPrep::runOnFunction(Function &F) {
bool MadeChange = false;
if (LI->empty())
return MadeChange;
for (auto I = df_begin(*LI->begin()), E = df_end(*LI->begin()); I != E; ++I) {
Loop *L = *I;
MadeChange |= runOnLoop(L);
}
for (auto I = LI->begin(), IE = LI->end(); I != IE; ++I)
for (auto L = df_begin(*I), LE = df_end(*I); L != LE; ++L)
MadeChange |= runOnLoop(*L);
return MadeChange;
}

48
test/CodeGen/PowerPC/loop-prep-all.ll Normal file
View File

@ -0,0 +1,48 @@
; RUN: llc < %s | FileCheck %s
; RUN: llc -mtriple=powerpc64-bgq-linux < %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-BGQ
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
; Function Attrs: nounwind
define void @foo(double* nocapture %x, double* nocapture readonly %y) #0 {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %y, i64 %indvars.iv
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %x, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond19 = icmp eq i64 %indvars.iv.next, 1600
br i1 %exitcond19, label %for.body7, label %for.body
; CHECK-LABEL: @foo
; CHECK-BGQ-DAG: dcbt 4, 5
; CHECK-DAG: lfdu [[REG1:[0-9]+]], 8({{[0-9]+}})
; CHECK-DAG: fadd [[REG2:[0-9]+]], [[REG1]], 0
; CHECK-DAG: stfdu [[REG2]], 8({{[0-9]+}})
; CHECK: bdnz
; CHECK: blr
for.cond.cleanup6: ; preds = %for.body7
ret void
for.body7: ; preds = %for.body, %for.body7
%i3.017 = phi i32 [ %inc9, %for.body7 ], [ 0, %for.body ]
tail call void bitcast (void (...)* @bar to void ()*)() #2
%inc9 = add nuw nsw i32 %i3.017, 1
%exitcond = icmp eq i32 %inc9, 1024
br i1 %exitcond, label %for.cond.cleanup6, label %for.body7
}
declare void @bar(...) #1
attributes #0 = { nounwind "target-cpu"="a2q" }
attributes #1 = { "target-cpu"="a2q" }
attributes #2 = { nounwind }