51 lines
1.8 KiB
LLVM
51 lines
1.8 KiB
LLVM
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; RUN: opt -passes='loop-vectorize' -mcpu=z13 -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 to exercise more cases in truncateToMinimalBitWidths().
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; Test passes if vector code is generated w/o hitting llvm_unreachable().
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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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target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
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target triple = "s390x-ibm-linux"
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define void @test(i32 zeroext %width, i8* nocapture %row, i16 zeroext %src, i16* nocapture readonly %dst) {
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entry:
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%cmp10 = icmp eq i32 %width, 0
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br i1 %cmp10, label %for.end, label %for.body.lr.ph
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for.body.lr.ph: ; preds = %entry
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%conv1 = zext i16 %src to i32
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br label %for.body
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for.body: ; preds = %for.inc, %for.body.lr.ph
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%i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
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%sp.011 = phi i8* [ %row, %for.body.lr.ph ], [ %incdec.ptr, %for.inc ]
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%0 = load i8, i8* %sp.011, align 1
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%conv = zext i8 %0 to i32
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%cmp2 = icmp eq i32 %conv, %conv1
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br i1 %cmp2, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i16, i16* %dst, align 2
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%conv4 = trunc i16 %1 to i8
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store i8 %conv4, i8* %sp.011, align 1
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%inc = add nuw i32 %i.012, 1
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%incdec.ptr = getelementptr inbounds i8, i8* %sp.011, i64 1
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%exitcond = icmp eq i32 %inc, %width
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit: ; preds = %for.inc
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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}
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