1; RUN: opt -passes='loop-vectorize' -mcpu=z13 -force-vector-width=2 -S < %s | FileCheck %s 2; 3; Forcing VF=2 to trigger vector code gen 4; 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 actually 9; vectorized. 10; 11; CHECK: vector.body 12 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, i8* nocapture %row, i16 zeroext %src, i16* nocapture readonly %dst) { 17entry: 18 %cmp10 = icmp eq i32 %width, 0 19 br i1 %cmp10, label %for.end, label %for.body.lr.ph 20 21for.body.lr.ph: ; preds = %entry 22 %conv1 = zext i16 %src to i32 23 br label %for.body 24 25for.body: ; preds = %for.inc, %for.body.lr.ph 26 %i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ] 27 %sp.011 = phi i8* [ %row, %for.body.lr.ph ], [ %incdec.ptr, %for.inc ] 28 %0 = load i8, i8* %sp.011, align 1 29 %conv = zext i8 %0 to i32 30 %cmp2 = icmp eq i32 %conv, %conv1 31 br i1 %cmp2, label %if.then, label %for.inc 32 33if.then: ; preds = %for.body 34 %1 = load i16, i16* %dst, align 2 35 %conv4 = trunc i16 %1 to i8 36 store i8 %conv4, i8* %sp.011, align 1 37 br label %for.inc 38 39for.inc: ; preds = %for.body, %if.then 40 %inc = add nuw i32 %i.012, 1 41 %incdec.ptr = getelementptr inbounds i8, i8* %sp.011, i64 1 42 %exitcond = icmp eq i32 %inc, %width 43 br i1 %exitcond, label %for.end.loopexit, label %for.body 44 45for.end.loopexit: ; preds = %for.inc 46 br label %for.end 47 48for.end: ; preds = %for.end.loopexit, %entry 49 ret void 50} 51