mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-28 04:33:05 +00:00
75277b9f70
A few minor changes to prevent @llvm.assume from interfering with loop vectorization. First, treat @llvm.assume like the lifetime intrinsics, which are scalarized (but don't otherwise interfere with the legality checking). Second, ignore the cost of ephemeral instructions in the loop (these will go away anyway during CodeGen). Alignment assumptions and other uses of @llvm.assume can often end up inside of loops that should be vectorized (this is not uncommon for assumptions generated by __attribute__((align_value(n))), for example). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219741 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.1 KiB
LLVM
101 lines
3.1 KiB
LLVM
; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define void @test1(float* noalias nocapture %a, float* noalias nocapture readonly %b) #0 {
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entry:
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br label %for.body
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; CHECK-LABEL: @test1
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; CHECK: vector.body:
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: for.body:
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; CHECK: ret void
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv
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%0 = load float* %arrayidx, align 4
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%cmp1 = fcmp ogt float %0, 1.000000e+02
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tail call void @llvm.assume(i1 %cmp1)
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%add = fadd float %0, 1.000000e+00
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%arrayidx5 = getelementptr inbounds float* %a, i64 %indvars.iv
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store float %add, float* %arrayidx5, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 1599
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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; Function Attrs: nounwind
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declare void @llvm.assume(i1) #1
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind }
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%struct.data = type { float*, float* }
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; Function Attrs: nounwind uwtable
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define void @test2(%struct.data* nocapture readonly %d) #0 {
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entry:
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%b = getelementptr inbounds %struct.data* %d, i64 0, i32 1
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%0 = load float** %b, align 8
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%ptrint = ptrtoint float* %0 to i64
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%maskedptr = and i64 %ptrint, 31
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%maskcond = icmp eq i64 %maskedptr, 0
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%a = getelementptr inbounds %struct.data* %d, i64 0, i32 0
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%1 = load float** %a, align 8
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%ptrint2 = ptrtoint float* %1 to i64
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%maskedptr3 = and i64 %ptrint2, 31
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%maskcond4 = icmp eq i64 %maskedptr3, 0
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br label %for.body
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; CHECK-LABEL: @test2
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; CHECK: vector.body:
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: @llvm.assume
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; CHECK: for.body:
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; CHECK: ret void
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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tail call void @llvm.assume(i1 %maskcond)
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%arrayidx = getelementptr inbounds float* %0, i64 %indvars.iv
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%2 = load float* %arrayidx, align 4
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%add = fadd float %2, 1.000000e+00
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tail call void @llvm.assume(i1 %maskcond4)
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%arrayidx5 = getelementptr inbounds float* %1, i64 %indvars.iv
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store float %add, float* %arrayidx5, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 1599
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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