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