| ; 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, i8* nocapture %row, i16 zeroext %src, i16* 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 i8* [ %row, %for.body.lr.ph ], [ %incdec.ptr, %for.inc ] | |
| %0 = load i8, i8* %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, i16* %dst, align 2 | |
| %conv4 = trunc i16 %1 to i8 | |
| store i8 %conv4, i8* %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, i8* %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 | |
| } |