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https://github.com/c64scene-ar/llvm-6502.git
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9a6c6a3736
small loops. On small loops post-loop that handles scalars (and runs slower) can take more time to execute than the rest of the loop. This patch disables widening of loops with a small static trip count. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171798 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.8 KiB
LLVM
51 lines
1.8 KiB
LLVM
; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx2 -force-vector-width=4 -force-vector-unroll=0 -dce -S | FileCheck %s
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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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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;CHECK: @foo
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;CHECK: load <4 x i32>
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;CHECK-NOT: load <4 x i32>
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;CHECK: store <4 x i32>
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;CHECK-NOT: store <4 x i32>
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;CHECK: ret
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define i32 @foo(i32* nocapture %A) nounwind uwtable ssp {
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br label %1
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; <label>:1 ; preds = %1, %0
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%indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
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%2 = getelementptr inbounds i32* %A, i64 %indvars.iv
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%3 = load i32* %2, align 4
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%4 = add nsw i32 %3, 6
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store i32 %4, i32* %2, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 100
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br i1 %exitcond, label %5, label %1
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; <label>:5 ; preds = %1
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ret i32 undef
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}
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;CHECK: @bar
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;CHECK: store <4 x i32>
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;CHECK: store <4 x i32>
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;CHECK: ret
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define i32 @bar(i32* nocapture %A, i32 %n) nounwind uwtable ssp {
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%1 = icmp sgt i32 %n, 0
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br i1 %1, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %0, %.lr.ph
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%indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
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%2 = getelementptr inbounds i32* %A, i64 %indvars.iv
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%3 = load i32* %2, align 4
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%4 = add nsw i32 %3, 6
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store i32 %4, i32* %2, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret i32 undef
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}
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