43 lines
1.5 KiB
LLVM
43 lines
1.5 KiB
LLVM
; RUN: opt -passes='loop-vectorize' -force-vector-width=2 -S < %s | FileCheck %s
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;
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; Forcing VF=2 to trigger vector code gen
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;
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; This is a test case that let's vectorizer's code gen to generate
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; more than one BasicBlocks in the loop body (emulated masked scatter)
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; for those targets that do not support masked scatter. Broadcast
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; code generation was previously dependent on loop body being
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; a single basic block and this test case exposed incorrect code gen
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; resulting in an assert in IL verification. Test passes if IL verification
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; does not fail.
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;
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; Performing minimal check in the output to ensure the loop is actually
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; vectorized.
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;
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; CHECK: vector.body
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@a = external global [2 x i16], align 1
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define void @f1() {
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entry:
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br label %for.body
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for.body: ; preds = %land.end, %entry
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%0 = phi i32 [ undef, %entry ], [ %dec, %land.end ]
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br i1 undef, label %land.end, label %land.rhs
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land.rhs: ; preds = %for.body
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%1 = load i32, i32* undef, align 1
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br label %land.end
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land.end: ; preds = %land.rhs, %for.body
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%2 = trunc i32 %0 to i16
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%arrayidx = getelementptr inbounds [2 x i16], [2 x i16]* @a, i16 0, i16 %2
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store i16 undef, i16* %arrayidx, align 1
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%dec = add nsw i32 %0, -1
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%cmp = icmp sgt i32 %0, 1
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
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for.cond.for.end_crit_edge: ; preds = %land.end
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unreachable
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}
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