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14f881da7f
The VSX versions have the advantage of a full 64-register target whereas the FP ones have the advantage of lower latency and higher throughput. So what we’re after is using the faster instructions in low register pressure situations and using the larger register file in high register pressure situations. The heuristic chooses between the following 7 pairs of instructions. PPC::LXSSPX vs PPC::LFSX PPC::LXSDX vs PPC::LFDX PPC::STXSSPX vs PPC::STFSX PPC::STXSDX vs PPC::STFDX PPC::LXSIWAX vs PPC::LFIWAX PPC::LXSIWZX vs PPC::LFIWZX PPC::STXSIWX vs PPC::STFIWX Differential Revision: https://reviews.llvm.org/D38486 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318651 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
2.9 KiB
LLVM
63 lines
2.9 KiB
LLVM
; RUN: llc -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
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; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck \
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; RUN: --check-prefix=CHECK-P9 %s
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; Verify correct generation of an lxsspx rather than an invalid optimization
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; to lxvdsx. Bugpoint-reduced test from Eric Schweitz.
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%struct.BSS38.51.4488.9911.14348.16813.20264.24701.28152.31603.35054.39491.44914.45407.46393.46886.47872.49351.49844.50830.51323.52309.53295.53788.54281.55267.55760.59211.61625 = type <{ [28 x i8] }>
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%struct_main1_2_.491.4928.10351.14788.17253.20704.25141.28592.32043.35494.39931.45354.45847.46833.47326.48312.49791.50284.51270.51763.52749.53735.54228.54721.55707.56200.59651.61626 = type <{ [64 x i8] }>
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@.BSS38 = external global %struct.BSS38.51.4488.9911.14348.16813.20264.24701.28152.31603.35054.39491.44914.45407.46393.46886.47872.49351.49844.50830.51323.52309.53295.53788.54281.55267.55760.59211.61625, align 32
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@_main1_2_ = external global %struct_main1_2_.491.4928.10351.14788.17253.20704.25141.28592.32043.35494.39931.45354.45847.46833.47326.48312.49791.50284.51270.51763.52749.53735.54228.54721.55707.56200.59651.61626, section ".comm", align 16
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define void @aercalc_() {
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L.entry:
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br i1 undef, label %L.LB38_2426, label %L.LB38_2911
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L.LB38_2911:
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br i1 undef, label %L.LB38_2140, label %L.LB38_2640
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L.LB38_2640:
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unreachable
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L.LB38_2426:
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br i1 undef, label %L.LB38_2438, label %L.LB38_2920
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L.LB38_2920:
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br i1 undef, label %L.LB38_2438, label %L.LB38_2921
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L.LB38_2921:
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br label %L.LB38_2140
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L.LB38_2140:
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ret void
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L.LB38_2438:
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br i1 undef, label %L.LB38_2451, label %L.LB38_2935
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L.LB38_2935:
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br i1 undef, label %L.LB38_2451, label %L.LB38_2936
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L.LB38_2936:
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unreachable
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L.LB38_2451:
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br i1 undef, label %L.LB38_2452, label %L.LB38_2937
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L.LB38_2937:
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unreachable
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L.LB38_2452:
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%0 = load float, float* bitcast (i8* getelementptr inbounds (%struct.BSS38.51.4488.9911.14348.16813.20264.24701.28152.31603.35054.39491.44914.45407.46393.46886.47872.49351.49844.50830.51323.52309.53295.53788.54281.55267.55760.59211.61625, %struct.BSS38.51.4488.9911.14348.16813.20264.24701.28152.31603.35054.39491.44914.45407.46393.46886.47872.49351.49844.50830.51323.52309.53295.53788.54281.55267.55760.59211.61625* @.BSS38, i64 0, i32 0, i64 16) to float*), align 16
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%1 = fpext float %0 to double
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%2 = insertelement <2 x double> undef, double %1, i32 1
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store <2 x double> %2, <2 x double>* bitcast (i8* getelementptr inbounds (%struct_main1_2_.491.4928.10351.14788.17253.20704.25141.28592.32043.35494.39931.45354.45847.46833.47326.48312.49791.50284.51270.51763.52749.53735.54228.54721.55707.56200.59651.61626, %struct_main1_2_.491.4928.10351.14788.17253.20704.25141.28592.32043.35494.39931.45354.45847.46833.47326.48312.49791.50284.51270.51763.52749.53735.54228.54721.55707.56200.59651.61626* @_main1_2_, i64 0, i32 0, i64 32) to <2 x double>*), align 16
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unreachable
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}
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; CHECK-LABEL: @aercalc_
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; CHECK: lfsx
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; CHECK-P9-LABEL: @aercalc_
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; CHECK-P9: lfs
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