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clang-p2996/llvm/test/Transforms/LoopUnrollAndJam/pragma-explicit.ll
Whitney Tsang d27a15fed7 [NFCI][LoopUnrollAndJam] Changing LoopUnrollAndJamPass to a function 
pass.

Summary: This patch changes LoopUnrollAndJamPass to a function pass, and
keeps the loops traversal order same as defined in
FunctionToLoopPassAdaptor LoopPassManager.h.

The next patch will change the loop traversal to outer to inner order,
so more loops can be transform.

Discussion in llvm-dev mailing list:
https://groups.google.com/forum/#!topic/llvm-dev/LF4rUjkVI2g
Reviewer: dmgreen, jdoerfert, Meinersbur, kbarton, bmahjour, etiotto
Reviewed By: dmgreen
Subscribers: hiraditya, zzheng, llvm-commits
Tag: LLVM
Differential Revision: https://reviews.llvm.org/D72230
2020-01-09 16:18:36 +00:00

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; RUN: opt -loop-unroll-and-jam -allow-unroll-and-jam -unroll-runtime -unroll-partial-threshold=60 < %s -S | FileCheck %s
; RUN: opt -aa-pipeline=type-based-aa,basic-aa -passes='unroll-and-jam' -allow-unroll-and-jam -unroll-runtime -unroll-partial-threshold=60 < %s -S | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: function
; The explicit metadata here should force this to be unroll and jammed 4 times (hence the %.pre60.3)
; CHECK: %.pre = phi i8 [ %.pre60.3, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %.pre.pre, %for.cond1.preheader.us.preheader.new ]
; CHECK: %indvars.iv.3 = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next.3, %for.body4.us ]
define void @function(i8* noalias nocapture %dst, i32 %dst_stride, i8* noalias nocapture readonly %src, i32 %src_stride, i32 %A, i32 %B, i32 %C, i32 %D, i32 %width, i32 %height) {
entry:
%idxprom = sext i32 %src_stride to i64
%cmp52 = icmp sgt i32 %height, 0
br i1 %cmp52, label %for.cond1.preheader.lr.ph, label %for.cond.cleanup
for.cond1.preheader.lr.ph: ; preds = %entry
%cmp249 = icmp sgt i32 %width, 0
%idx.ext = sext i32 %dst_stride to i64
br i1 %cmp249, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup
for.cond1.preheader.us.preheader: ; preds = %for.cond1.preheader.lr.ph
%.pre.pre = load i8, i8* %src, align 1
%wide.trip.count = zext i32 %width to i64
br label %for.cond1.preheader.us
for.cond1.preheader.us: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %for.cond1.preheader.us.preheader
%.pre = phi i8 [ %.pre60, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %.pre.pre, %for.cond1.preheader.us.preheader ]
%srcp.056.us.pn = phi i8* [ %srcp.056.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %src, %for.cond1.preheader.us.preheader ]
%y.055.us = phi i32 [ %inc30.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
%dst.addr.054.us = phi i8* [ %add.ptr.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %dst, %for.cond1.preheader.us.preheader ]
%srcp.056.us = getelementptr inbounds i8, i8* %srcp.056.us.pn, i64 %idxprom
%.pre60 = load i8, i8* %srcp.056.us, align 1
br label %for.body4.us
for.body4.us: ; preds = %for.body4.us, %for.cond1.preheader.us
%0 = phi i8 [ %.pre60, %for.cond1.preheader.us ], [ %3, %for.body4.us ]
%1 = phi i8 [ %.pre, %for.cond1.preheader.us ], [ %2, %for.body4.us ]
%indvars.iv = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next, %for.body4.us ]
%conv.us = zext i8 %1 to i32
%mul.us = mul nsw i32 %conv.us, %A
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%arrayidx8.us = getelementptr inbounds i8, i8* %srcp.056.us.pn, i64 %indvars.iv.next
%2 = load i8, i8* %arrayidx8.us, align 1
%conv9.us = zext i8 %2 to i32
%mul10.us = mul nsw i32 %conv9.us, %B
%conv14.us = zext i8 %0 to i32
%mul15.us = mul nsw i32 %conv14.us, %C
%arrayidx19.us = getelementptr inbounds i8, i8* %srcp.056.us, i64 %indvars.iv.next
%3 = load i8, i8* %arrayidx19.us, align 1
%conv20.us = zext i8 %3 to i32
%mul21.us = mul nsw i32 %conv20.us, %D
%add11.us = add i32 %mul.us, 32
%add16.us = add i32 %add11.us, %mul10.us
%add22.us = add i32 %add16.us, %mul15.us
%add23.us = add i32 %add22.us, %mul21.us
%4 = lshr i32 %add23.us, 6
%conv24.us = trunc i32 %4 to i8
%arrayidx26.us = getelementptr inbounds i8, i8* %dst.addr.054.us, i64 %indvars.iv
store i8 %conv24.us, i8* %arrayidx26.us, align 1
%exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.cond1.for.cond.cleanup3_crit_edge.us, label %for.body4.us
for.cond1.for.cond.cleanup3_crit_edge.us: ; preds = %for.body4.us
%add.ptr.us = getelementptr inbounds i8, i8* %dst.addr.054.us, i64 %idx.ext
%inc30.us = add nuw nsw i32 %y.055.us, 1
%exitcond58 = icmp eq i32 %inc30.us, %height
br i1 %exitcond58, label %for.cond.cleanup, label %for.cond1.preheader.us, !llvm.loop !5
for.cond.cleanup: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %for.cond1.preheader.lr.ph, %entry
ret void
}
; CHECK-LABEL: function2
; The explicit metadata here should force this to be unroll and jammed, but
; the count is left to thresholds. In this case 2 (hence %.pre60.1).
; CHECK: %.pre = phi i8 [ %.pre60.1, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %.pre.pre, %for.cond1.preheader.us.preheader.new ]
; CHECK: %indvars.iv.1 = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next.1, %for.body4.us ]
define void @function2(i8* noalias nocapture %dst, i32 %dst_stride, i8* noalias nocapture readonly %src, i32 %src_stride, i32 %A, i32 %B, i32 %C, i32 %D, i32 %width, i32 %height) {
entry:
%idxprom = sext i32 %src_stride to i64
%cmp52 = icmp sgt i32 %height, 0
br i1 %cmp52, label %for.cond1.preheader.lr.ph, label %for.cond.cleanup
for.cond1.preheader.lr.ph: ; preds = %entry
%cmp249 = icmp sgt i32 %width, 0
%idx.ext = sext i32 %dst_stride to i64
br i1 %cmp249, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup
for.cond1.preheader.us.preheader: ; preds = %for.cond1.preheader.lr.ph
%.pre.pre = load i8, i8* %src, align 1
%wide.trip.count = zext i32 %width to i64
br label %for.cond1.preheader.us
for.cond1.preheader.us: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %for.cond1.preheader.us.preheader
%.pre = phi i8 [ %.pre60, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %.pre.pre, %for.cond1.preheader.us.preheader ]
%srcp.056.us.pn = phi i8* [ %srcp.056.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %src, %for.cond1.preheader.us.preheader ]
%y.055.us = phi i32 [ %inc30.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
%dst.addr.054.us = phi i8* [ %add.ptr.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ %dst, %for.cond1.preheader.us.preheader ]
%srcp.056.us = getelementptr inbounds i8, i8* %srcp.056.us.pn, i64 %idxprom
%.pre60 = load i8, i8* %srcp.056.us, align 1
br label %for.body4.us
for.body4.us: ; preds = %for.body4.us, %for.cond1.preheader.us
%0 = phi i8 [ %.pre60, %for.cond1.preheader.us ], [ %3, %for.body4.us ]
%1 = phi i8 [ %.pre, %for.cond1.preheader.us ], [ %2, %for.body4.us ]
%indvars.iv = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next, %for.body4.us ]
%conv.us = zext i8 %1 to i32
%mul.us = mul nsw i32 %conv.us, %A
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%arrayidx8.us = getelementptr inbounds i8, i8* %srcp.056.us.pn, i64 %indvars.iv.next
%2 = load i8, i8* %arrayidx8.us, align 1
%conv9.us = zext i8 %2 to i32
%mul10.us = mul nsw i32 %conv9.us, %B
%conv14.us = zext i8 %0 to i32
%mul15.us = mul nsw i32 %conv14.us, %C
%arrayidx19.us = getelementptr inbounds i8, i8* %srcp.056.us, i64 %indvars.iv.next
%3 = load i8, i8* %arrayidx19.us, align 1
%conv20.us = zext i8 %3 to i32
%mul21.us = mul nsw i32 %conv20.us, %D
%add11.us = add i32 %mul.us, 32
%add16.us = add i32 %add11.us, %mul10.us
%add22.us = add i32 %add16.us, %mul15.us
%add23.us = add i32 %add22.us, %mul21.us
%4 = lshr i32 %add23.us, 6
%conv24.us = trunc i32 %4 to i8
%arrayidx26.us = getelementptr inbounds i8, i8* %dst.addr.054.us, i64 %indvars.iv
store i8 %conv24.us, i8* %arrayidx26.us, align 1
%exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.cond1.for.cond.cleanup3_crit_edge.us, label %for.body4.us
for.cond1.for.cond.cleanup3_crit_edge.us: ; preds = %for.body4.us
%add.ptr.us = getelementptr inbounds i8, i8* %dst.addr.054.us, i64 %idx.ext
%inc30.us = add nuw nsw i32 %y.055.us, 1
%exitcond58 = icmp eq i32 %inc30.us, %height
br i1 %exitcond58, label %for.cond.cleanup, label %for.cond1.preheader.us, !llvm.loop !7
for.cond.cleanup: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %for.cond1.preheader.lr.ph, %entry
ret void
}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.unroll_and_jam.count", i32 4}
!7 = distinct !{!7, !8}
!8 = !{!"llvm.loop.unroll_and_jam.enable"}
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