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Revert r190764: PPC: Don't restrict lvsl generation to after type legalization

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This is causing test-suite failures.

Original commit message:

The PPC backend uses a target-specific DAG combine to turn unaligned Altivec
loads into a permutation-based sequence when possible. Unfortunately, the
target-specific DAG combine is not always called on all loads of interest
(sometimes the routines in DAGCombine call CombineTo such that the new node and
users are not added to the worklist); allowing the combine to trigger early
(before type legalization) mitigates this problem. Because the autovectorizers
only create legal vector types, I don't expect a lot of cases where this
optimization is enabled by type legalization in practice.

llvm-svn: 190765
This commit is contained in:
Hal Finkel 2013-09-15 15:41:11 +00:00
parent ae7feec56e
commit c45bfe85cc
2 changed files with 1 additions and 154 deletions
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1
lib/Target/PowerPC/PPCISelLowering.cpp
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@ -7177,6 +7177,7 @@ SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
unsigned ABIAlignment = getDataLayout()->getABITypeAlignment(Ty);
if (ISD::isNON_EXTLoad(N) && VT.isVector() &&
TM.getSubtarget<PPCSubtarget>().hasAltivec() &&
DCI.getDAGCombineLevel() == AfterLegalizeTypes &&
LD->getAlignment() < ABIAlignment) {
// This is a type-legal unaligned Altivec load.
SDValue Chain = LD->getChain();

154
test/CodeGen/PowerPC/unal-altivec2.ll
View File

@ -1,154 +0,0 @@
; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %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-f128:128:128-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
; Function Attrs: nounwind
define void @foo(float* noalias nocapture %x, float* noalias nocapture readonly %y) #0 {
entry:
br label %vector.body
vector.body: ; preds = %vector.body, %entry
; CHECK-LABEL: @foo
; CHECK: lvsl
; CHECK: blr
%index = phi i64 [ 0, %entry ], [ %index.next.15, %vector.body ]
%0 = getelementptr inbounds float* %y, i64 %index
%1 = bitcast float* %0 to <4 x float>*
%wide.load = load <4 x float>* %1, align 4
%2 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load)
%3 = getelementptr inbounds float* %x, i64 %index
%4 = bitcast float* %3 to <4 x float>*
store <4 x float> %2, <4 x float>* %4, align 4
%index.next = add i64 %index, 4
%5 = getelementptr inbounds float* %y, i64 %index.next
%6 = bitcast float* %5 to <4 x float>*
%wide.load.1 = load <4 x float>* %6, align 4
%7 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.1)
%8 = getelementptr inbounds float* %x, i64 %index.next
%9 = bitcast float* %8 to <4 x float>*
store <4 x float> %7, <4 x float>* %9, align 4
%index.next.1 = add i64 %index.next, 4
%10 = getelementptr inbounds float* %y, i64 %index.next.1
%11 = bitcast float* %10 to <4 x float>*
%wide.load.2 = load <4 x float>* %11, align 4
%12 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.2)
%13 = getelementptr inbounds float* %x, i64 %index.next.1
%14 = bitcast float* %13 to <4 x float>*
store <4 x float> %12, <4 x float>* %14, align 4
%index.next.2 = add i64 %index.next.1, 4
%15 = getelementptr inbounds float* %y, i64 %index.next.2
%16 = bitcast float* %15 to <4 x float>*
%wide.load.3 = load <4 x float>* %16, align 4
%17 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.3)
%18 = getelementptr inbounds float* %x, i64 %index.next.2
%19 = bitcast float* %18 to <4 x float>*
store <4 x float> %17, <4 x float>* %19, align 4
%index.next.3 = add i64 %index.next.2, 4
%20 = getelementptr inbounds float* %y, i64 %index.next.3
%21 = bitcast float* %20 to <4 x float>*
%wide.load.4 = load <4 x float>* %21, align 4
%22 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.4)
%23 = getelementptr inbounds float* %x, i64 %index.next.3
%24 = bitcast float* %23 to <4 x float>*
store <4 x float> %22, <4 x float>* %24, align 4
%index.next.4 = add i64 %index.next.3, 4
%25 = getelementptr inbounds float* %y, i64 %index.next.4
%26 = bitcast float* %25 to <4 x float>*
%wide.load.5 = load <4 x float>* %26, align 4
%27 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.5)
%28 = getelementptr inbounds float* %x, i64 %index.next.4
%29 = bitcast float* %28 to <4 x float>*
store <4 x float> %27, <4 x float>* %29, align 4
%index.next.5 = add i64 %index.next.4, 4
%30 = getelementptr inbounds float* %y, i64 %index.next.5
%31 = bitcast float* %30 to <4 x float>*
%wide.load.6 = load <4 x float>* %31, align 4
%32 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.6)
%33 = getelementptr inbounds float* %x, i64 %index.next.5
%34 = bitcast float* %33 to <4 x float>*
store <4 x float> %32, <4 x float>* %34, align 4
%index.next.6 = add i64 %index.next.5, 4
%35 = getelementptr inbounds float* %y, i64 %index.next.6
%36 = bitcast float* %35 to <4 x float>*
%wide.load.7 = load <4 x float>* %36, align 4
%37 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.7)
%38 = getelementptr inbounds float* %x, i64 %index.next.6
%39 = bitcast float* %38 to <4 x float>*
store <4 x float> %37, <4 x float>* %39, align 4
%index.next.7 = add i64 %index.next.6, 4
%40 = getelementptr inbounds float* %y, i64 %index.next.7
%41 = bitcast float* %40 to <4 x float>*
%wide.load.8 = load <4 x float>* %41, align 4
%42 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.8)
%43 = getelementptr inbounds float* %x, i64 %index.next.7
%44 = bitcast float* %43 to <4 x float>*
store <4 x float> %42, <4 x float>* %44, align 4
%index.next.8 = add i64 %index.next.7, 4
%45 = getelementptr inbounds float* %y, i64 %index.next.8
%46 = bitcast float* %45 to <4 x float>*
%wide.load.9 = load <4 x float>* %46, align 4
%47 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.9)
%48 = getelementptr inbounds float* %x, i64 %index.next.8
%49 = bitcast float* %48 to <4 x float>*
store <4 x float> %47, <4 x float>* %49, align 4
%index.next.9 = add i64 %index.next.8, 4
%50 = getelementptr inbounds float* %y, i64 %index.next.9
%51 = bitcast float* %50 to <4 x float>*
%wide.load.10 = load <4 x float>* %51, align 4
%52 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.10)
%53 = getelementptr inbounds float* %x, i64 %index.next.9
%54 = bitcast float* %53 to <4 x float>*
store <4 x float> %52, <4 x float>* %54, align 4
%index.next.10 = add i64 %index.next.9, 4
%55 = getelementptr inbounds float* %y, i64 %index.next.10
%56 = bitcast float* %55 to <4 x float>*
%wide.load.11 = load <4 x float>* %56, align 4
%57 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.11)
%58 = getelementptr inbounds float* %x, i64 %index.next.10
%59 = bitcast float* %58 to <4 x float>*
store <4 x float> %57, <4 x float>* %59, align 4
%index.next.11 = add i64 %index.next.10, 4
%60 = getelementptr inbounds float* %y, i64 %index.next.11
%61 = bitcast float* %60 to <4 x float>*
%wide.load.12 = load <4 x float>* %61, align 4
%62 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.12)
%63 = getelementptr inbounds float* %x, i64 %index.next.11
%64 = bitcast float* %63 to <4 x float>*
store <4 x float> %62, <4 x float>* %64, align 4
%index.next.12 = add i64 %index.next.11, 4
%65 = getelementptr inbounds float* %y, i64 %index.next.12
%66 = bitcast float* %65 to <4 x float>*
%wide.load.13 = load <4 x float>* %66, align 4
%67 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.13)
%68 = getelementptr inbounds float* %x, i64 %index.next.12
%69 = bitcast float* %68 to <4 x float>*
store <4 x float> %67, <4 x float>* %69, align 4
%index.next.13 = add i64 %index.next.12, 4
%70 = getelementptr inbounds float* %y, i64 %index.next.13
%71 = bitcast float* %70 to <4 x float>*
%wide.load.14 = load <4 x float>* %71, align 4
%72 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.14)
%73 = getelementptr inbounds float* %x, i64 %index.next.13
%74 = bitcast float* %73 to <4 x float>*
store <4 x float> %72, <4 x float>* %74, align 4
%index.next.14 = add i64 %index.next.13, 4
%75 = getelementptr inbounds float* %y, i64 %index.next.14
%76 = bitcast float* %75 to <4 x float>*
%wide.load.15 = load <4 x float>* %76, align 4
%77 = call <4 x float> @llvm_cos_v4f32(<4 x float> %wide.load.15)
%78 = getelementptr inbounds float* %x, i64 %index.next.14
%79 = bitcast float* %78 to <4 x float>*
store <4 x float> %77, <4 x float>* %79, align 4
%index.next.15 = add i64 %index.next.14, 4
%80 = icmp eq i64 %index.next.15, 2048
br i1 %80, label %for.end, label %vector.body
for.end: ; preds = %vector.body
ret void
}
; Function Attrs: nounwind readonly
declare <4 x float> @llvm_cos_v4f32(<4 x float>) #1
attributes #0 = { nounwind }
attributes #1 = { nounwind readonly }