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1; RUN: opt -passes='loop-vectorize' -mcpu=z13 -force-vector-width=2 -S < %s | FileCheck %s2;3; Forcing VF=2 to trigger vector code gen4;5; This is a test case to exercise more cases in truncateToMinimalBitWidths().6; Test passes if vector code is generated w/o hitting llvm_unreachable().7;8; Performing minimal check in the output to ensure the loop is actually9; vectorized.10;11; CHECK: vector.body12 13target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"14target triple = "s390x-ibm-linux"15 16define void @test(i32 zeroext %width, ptr nocapture %row, i16 zeroext %src, ptr nocapture readonly %dst) {17entry:18 %cmp10 = icmp eq i32 %width, 019 br i1 %cmp10, label %for.end, label %for.body.lr.ph20 21for.body.lr.ph: ; preds = %entry22 %conv1 = zext i16 %src to i3223 br label %for.body24 25for.body: ; preds = %for.inc, %for.body.lr.ph26 %i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]27 %sp.011 = phi ptr [ %row, %for.body.lr.ph ], [ %incdec.ptr, %for.inc ]28 %0 = load i8, ptr %sp.011, align 129 %conv = zext i8 %0 to i3230 %cmp2 = icmp eq i32 %conv, %conv131 br i1 %cmp2, label %if.then, label %for.inc32 33if.then: ; preds = %for.body34 %1 = load i16, ptr %dst, align 235 %conv4 = trunc i16 %1 to i836 store i8 %conv4, ptr %sp.011, align 137 br label %for.inc38 39for.inc: ; preds = %for.body, %if.then40 %inc = add nuw i32 %i.012, 141 %incdec.ptr = getelementptr inbounds i8, ptr %sp.011, i64 142 %exitcond = icmp eq i32 %inc, %width43 br i1 %exitcond, label %for.end.loopexit, label %for.body44 45for.end.loopexit: ; preds = %for.inc46 br label %for.end47 48for.end: ; preds = %for.end.loopexit, %entry49 ret void50}51