45 lines
1.3 KiB
LLVM
45 lines
1.3 KiB
LLVM
; RUN: opt -O2 -S %s | FileCheck %s
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; RUN: opt -passes='default<O2>' -S %s | FileCheck %s
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx"
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; The loop below needs to be peeled first to eliminate the constant PHI %first
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; before loop vectorization.
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;
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; Test case from PR47671.
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define i32 @test(i32* readonly %p, i32* readnone %q) {
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; CHECK-LABEL: define i32 @test(
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; CHECK: vector.body:
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; CHECK: %index.next = add i64 %index, 8
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; CHECK: middle.block:
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;
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entry:
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%cmp.not7 = icmp eq i32* %p, %q
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br i1 %cmp.not7, label %exit, label %loop.ph
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loop.ph:
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br label %loop
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loop:
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%sum = phi i32 [ %sum.next, %loop ], [ 0, %loop.ph ]
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%first = phi i1 [ false, %loop ], [ true, %loop.ph ]
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%iv = phi i32* [ %iv.next, %loop ], [ %p, %loop.ph ]
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%add = add nsw i32 %sum, 2
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%spec.select = select i1 %first, i32 %sum, i32 %add
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%lv = load i32, i32* %iv, align 4
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%sum.next = add nsw i32 %lv, %spec.select
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%iv.next = getelementptr inbounds i32, i32* %iv, i64 1
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%cmp.not = icmp eq i32* %iv.next, %q
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br i1 %cmp.not, label %loopexit, label %loop
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loopexit:
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%sum.next.lcssa = phi i32 [ %sum.next, %loop ]
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br label %exit
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exit:
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.next.lcssa, %loopexit ]
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ret i32 %sum.0.lcssa
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}
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