| ; PR41445: This test checks the case when LSR split critical edge |
| ; and phi node has other pending fixup operands |
| |
| ; RUN: opt -S -loop-reduce < %s | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; We have %indvars.iv.lcssa phi node where 4 input operands |
| ; need to be rewritten: %tmp1, %tmp2, %tmp3, %tmp4. |
| ; When we try to rewrite %tmp1, we first split the critical edge. |
| ; All the other PHI inputs besides %tmp1 go to a new phi node. |
| ; This test checks that LSR is still able to rewrite %tmp2, %tmp3, %tmp4. |
| define i32 @foo(i32* %A, i32 %t) { |
| entry: |
| br label %loop.32 |
| |
| loop.exit: ; preds = %then.8.1, %then.8, %ifmerge.42, %ifmerge.38, %ifmerge.34, %then.34 |
| %indvars.iv.lcssa = phi i64 [ 48, %then.8 ], [ 49, %then.8.1 ], [ %tmp4, %ifmerge.42 ], [ %tmp3, %ifmerge.38 ], [ %tmp2, %ifmerge.34 ], [ %tmp1, %then.34 ] |
| %tmp = trunc i64 %indvars.iv.lcssa to i32 |
| br label %for.end |
| |
| for.end: ; preds = %then.8.1, %ifmerge.8, %loop.exit |
| %i.0.lcssa = phi i32 [ %tmp, %loop.exit ], [ 50, %then.8.1 ], [ 50, %ifmerge.8 ] |
| ret i32 %i.0.lcssa |
| |
| ; shl instruction will be dead eliminated when all it's uses will be rewritten. |
| ; CHECK-LABEL: loop.32: |
| ; CHECK-NOT: shl |
| loop.32: ; preds = %ifmerge.46, %entry |
| %i1.i64.0 = phi i64 [ 0, %entry ], [ %nextivloop.32, %ifmerge.46 ] |
| %tmp1 = shl i64 %i1.i64.0, 2 |
| %tmp2 = or i64 %tmp1, 1 |
| %arrayIdx = getelementptr inbounds i32, i32* %A, i64 %tmp2 |
| %gepload = load i32, i32* %arrayIdx, align 4 |
| %cmp.34 = icmp sgt i32 %gepload, %t |
| br i1 %cmp.34, label %then.34, label %ifmerge.34 |
| |
| ; CHECK-LABEL: then.34: |
| then.34: ; preds = %loop.32 |
| %arrayIdx17 = getelementptr inbounds i32, i32* %A, i64 %tmp1 |
| %gepload18 = load i32, i32* %arrayIdx17, align 4 |
| %cmp.35 = icmp slt i32 %gepload18, %t |
| br i1 %cmp.35, label %loop.exit, label %ifmerge.34 |
| |
| ifmerge.34: ; preds = %then.34, %loop.32 |
| %tmp3 = or i64 %tmp1, 2 |
| %arrayIdx19 = getelementptr inbounds i32, i32* %A, i64 %tmp3 |
| %gepload20 = load i32, i32* %arrayIdx19, align 4 |
| %cmp.38 = icmp sgt i32 %gepload20, %t |
| %cmp.39 = icmp slt i32 %gepload, %t |
| %or.cond = and i1 %cmp.38, %cmp.39 |
| br i1 %or.cond, label %loop.exit, label %ifmerge.38 |
| |
| ifmerge.38: ; preds = %ifmerge.34 |
| %tmp4 = or i64 %tmp1, 3 |
| %arrayIdx23 = getelementptr inbounds i32, i32* %A, i64 %tmp4 |
| %gepload24 = load i32, i32* %arrayIdx23, align 4 |
| %cmp.42 = icmp sgt i32 %gepload24, %t |
| %cmp.43 = icmp slt i32 %gepload20, %t |
| %or.cond55 = and i1 %cmp.42, %cmp.43 |
| br i1 %or.cond55, label %loop.exit, label %ifmerge.42 |
| |
| ifmerge.42: ; preds = %ifmerge.38 |
| %tmp5 = add i64 %tmp1, 4 |
| %arrayIdx27 = getelementptr inbounds i32, i32* %A, i64 %tmp5 |
| %gepload28 = load i32, i32* %arrayIdx27, align 4 |
| %cmp.46 = icmp sgt i32 %gepload28, %t |
| %cmp.47 = icmp slt i32 %gepload24, %t |
| %or.cond56 = and i1 %cmp.46, %cmp.47 |
| br i1 %or.cond56, label %loop.exit, label %ifmerge.46 |
| |
| ifmerge.46: ; preds = %ifmerge.42 |
| %nextivloop.32 = add nuw nsw i64 %i1.i64.0, 1 |
| %condloop.32 = icmp ult i64 %nextivloop.32, 12 |
| br i1 %condloop.32, label %loop.32, label %loop.25 |
| |
| loop.25: ; preds = %ifmerge.46 |
| %arrayIdx31 = getelementptr inbounds i32, i32* %A, i64 49 |
| %gepload32 = load i32, i32* %arrayIdx31, align 4 |
| %cmp.8 = icmp sgt i32 %gepload32, %t |
| br i1 %cmp.8, label %then.8, label %ifmerge.8 |
| |
| then.8: ; preds = %loop.25 |
| %arrayIdx33 = getelementptr inbounds i32, i32* %A, i64 48 |
| %gepload34 = load i32, i32* %arrayIdx33, align 4 |
| %cmp.15 = icmp slt i32 %gepload34, %t |
| br i1 %cmp.15, label %loop.exit, label %ifmerge.8 |
| |
| ifmerge.8: ; preds = %then.8, %loop.25 |
| %arrayIdx31.1 = getelementptr inbounds i32, i32* %A, i64 50 |
| %gepload32.1 = load i32, i32* %arrayIdx31.1, align 4 |
| %cmp.8.1 = icmp sgt i32 %gepload32.1, %t |
| br i1 %cmp.8.1, label %then.8.1, label %for.end |
| |
| then.8.1: ; preds = %ifmerge.8 |
| %arrayIdx33.1 = getelementptr inbounds i32, i32* %A, i64 49 |
| %gepload34.1 = load i32, i32* %arrayIdx33.1, align 4 |
| %cmp.15.1 = icmp slt i32 %gepload34.1, %t |
| br i1 %cmp.15.1, label %loop.exit, label %for.end |
| } |