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clang-p2996/llvm/test/Transforms/DFAJumpThreading/dfa-unfold-select.ll
Usman Nadeem c9325f8a2e [DFAJumpThreading] Add an early exit heuristic for unpredictable values (#85015) 
Right now the algorithm does not exit on unpredictable values. It
waits until all the paths have been enumerated to see if any of
those paths have that value. Waiting this late leads to a lot of
wasteful computation and higher compile time.

In this patch I have added a heuristic that checks if the value
comes from the same inner loops as the switch, if so, then it is
likely that the value will also be seen on a threadable path and
the code in `getStateDefMap()` return an empty map.

I tested this on the llvm test suite and the only change in the
number of threaded switches was in 7zip (before 23, after 18).
In all of those cases the current algorithm was partially threading
the loop because it was hitting a limit on the number of paths to
be explored. On increasing this limit even the current algorithm
finds paths where the unpredictable value is seen.

Compile time(with pass enabled by default and this patch):

https://llvm-compile-time-tracker.com/compare.php?from=8c5e9cf737138aba22a4a8f64ef2c5efc80dd7f9&to=42c75d888058b35c6d15901b34e36251d8f766b9&stat=instructions:u
2024-03-16 11:24:42 -07:00

372 lines
17 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=dfa-jump-threading -dfa-early-exit-heuristic=false %s | FileCheck %s
; These tests check if selects are unfolded properly for jump threading
; opportunities. There are three different patterns to consider:
; 1) Both operands are constant and the false branch is unfolded by default
; 2) One operand is constant and the other is another select to be unfolded. In
; this case a single select is sunk to a new block to unfold.
; 3) Both operands are a select, and both should be sunk to new blocks.
define i32 @test1(i32 %num) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
; CHECK-NEXT: ]
; CHECK: for.body.jt2:
; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
; CHECK-NEXT: br label [[CASE2]]
; CHECK: for.body.jt1:
; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: br label [[CASE1]]
; CHECK: case1:
; CHECK-NEXT: [[COUNT2:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: case2:
; CHECK-NEXT: [[COUNT1:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[COUNT1]], 50
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE:%.*]]
; CHECK: si.unfold.false:
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.inc.jt2:
; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT1]], [[SI_UNFOLD_FALSE]] ], [ [[COUNT2]], [[CASE1]] ]
; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ 2, [[SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT4]], 1
; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
; CHECK: for.inc.jt1:
; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT1]], [[CASE2]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[CASE2]] ], [ 1, [[FOR_BODY]] ]
; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT3]], 1
; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret i32 0
;
entry:
br label %for.body
for.body:
%count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
switch i32 %state, label %for.inc [
i32 1, label %case1
i32 2, label %case2
]
case1:
br label %for.inc
case2:
%cmp = icmp slt i32 %count, 50
%sel = select i1 %cmp, i32 1, i32 2
br label %for.inc
for.inc:
%state.next = phi i32 [ %sel, %case2 ], [ 1, %for.body ], [ 2, %case1 ]
%inc = add nsw i32 %count, 1
%cmp.exit = icmp slt i32 %inc, %num
br i1 %cmp.exit, label %for.body, label %for.end
for.end:
ret i32 0
}
define i32 @test2(i32 %num) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
; CHECK-NEXT: ]
; CHECK: for.body.jt3:
; CHECK-NEXT: [[COUNT_JT3:%.*]] = phi i32 [ [[INC_JT3:%.*]], [[FOR_INC_JT3:%.*]] ]
; CHECK-NEXT: [[STATE_JT3:%.*]] = phi i32 [ [[STATE_NEXT_JT3:%.*]], [[FOR_INC_JT3]] ]
; CHECK-NEXT: br label [[FOR_INC_JT1]]
; CHECK: for.body.jt2:
; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
; CHECK-NEXT: br label [[CASE2]]
; CHECK: for.body.jt1:
; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: br label [[CASE1]]
; CHECK: case1:
; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP_C1:%.*]] = icmp slt i32 [[COUNT5]], 50
; CHECK-NEXT: [[CMP2_C1:%.*]] = icmp slt i32 [[COUNT5]], 100
; CHECK-NEXT: br i1 [[CMP2_C1]], label [[SI_UNFOLD_TRUE:%.*]], label [[FOR_INC_JT3]]
; CHECK: case2:
; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP_C2:%.*]] = icmp slt i32 [[COUNT3]], 50
; CHECK-NEXT: [[CMP2_C2:%.*]] = icmp sgt i32 [[COUNT3]], 100
; CHECK-NEXT: br i1 [[CMP2_C2]], label [[FOR_INC_JT3]], label [[SI_UNFOLD_FALSE:%.*]]
; CHECK: si.unfold.false:
; CHECK-NEXT: br i1 [[CMP_C2]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE1:%.*]]
; CHECK: si.unfold.false1:
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_C1]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE2:%.*]]
; CHECK: si.unfold.false2:
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.inc.jt3:
; CHECK-NEXT: [[COUNT6:%.*]] = phi i32 [ [[COUNT3]], [[CASE2]] ], [ [[COUNT5]], [[CASE1]] ]
; CHECK-NEXT: [[STATE_NEXT_JT3]] = phi i32 [ 3, [[CASE1]] ], [ 3, [[CASE2]] ]
; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT6]], 1
; CHECK-NEXT: [[CMP_EXIT_JT3:%.*]] = icmp slt i32 [[INC_JT3]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT3]], label [[FOR_BODY_JT3:%.*]], label [[FOR_END]]
; CHECK: for.inc.jt2:
; CHECK-NEXT: [[COUNT7:%.*]] = phi i32 [ [[COUNT3]], [[SI_UNFOLD_FALSE1]] ], [ [[COUNT5]], [[SI_UNFOLD_FALSE2]] ]
; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[SI_UNFOLD_FALSE1]] ], [ 2, [[SI_UNFOLD_FALSE2]] ]
; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT7]], 1
; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
; CHECK: for.inc.jt1:
; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT_JT3]], [[FOR_BODY_JT3]] ], [ [[COUNT3]], [[SI_UNFOLD_FALSE]] ], [ [[COUNT5]], [[SI_UNFOLD_TRUE]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ 1, [[SI_UNFOLD_FALSE]] ], [ 1, [[SI_UNFOLD_TRUE]] ], [ 1, [[FOR_BODY_JT3]] ]
; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT4]], 1
; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret i32 0
;
entry:
br label %for.body
for.body:
%count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
switch i32 %state, label %for.inc [
i32 1, label %case1
i32 2, label %case2
]
case1:
%cmp.c1 = icmp slt i32 %count, 50
%cmp2.c1 = icmp slt i32 %count, 100
%state1.1 = select i1 %cmp.c1, i32 1, i32 2
%state1.2 = select i1 %cmp2.c1, i32 %state1.1, i32 3
br label %for.inc
case2:
%cmp.c2 = icmp slt i32 %count, 50
%cmp2.c2 = icmp sgt i32 %count, 100
%state2.1 = select i1 %cmp.c2, i32 1, i32 2
%state2.2 = select i1 %cmp2.c2, i32 3, i32 %state2.1
br label %for.inc
for.inc:
%state.next = phi i32 [ %state1.2, %case1 ], [ %state2.2, %case2 ], [ 1, %for.body ]
%inc = add nsw i32 %count, 1
%cmp.exit = icmp slt i32 %inc, %num
br i1 %cmp.exit, label %for.body, label %for.end
for.end:
ret i32 0
}
define i32 @test3(i32 %num) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
; CHECK-NEXT: ]
; CHECK: for.body.jt4:
; CHECK-NEXT: [[COUNT_JT4:%.*]] = phi i32 [ [[INC_JT4:%.*]], [[FOR_INC_JT4:%.*]] ]
; CHECK-NEXT: [[STATE_JT4:%.*]] = phi i32 [ [[STATE_NEXT_JT4:%.*]], [[FOR_INC_JT4]] ]
; CHECK-NEXT: br label [[FOR_INC_JT1]]
; CHECK: for.body.jt3:
; CHECK-NEXT: [[COUNT_JT3:%.*]] = phi i32 [ [[INC_JT3:%.*]], [[FOR_INC_JT3:%.*]] ]
; CHECK-NEXT: [[STATE_JT3:%.*]] = phi i32 [ [[STATE_NEXT_JT3:%.*]], [[FOR_INC_JT3]] ]
; CHECK-NEXT: br label [[FOR_INC_JT1]]
; CHECK: for.body.jt2:
; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
; CHECK-NEXT: br label [[CASE2]]
; CHECK: for.body.jt1:
; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
; CHECK-NEXT: br label [[CASE1]]
; CHECK: case1:
; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: case2:
; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP_1:%.*]] = icmp slt i32 [[COUNT4]], 50
; CHECK-NEXT: [[CMP_2:%.*]] = icmp slt i32 [[COUNT4]], 100
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[COUNT4]], 1
; CHECK-NEXT: [[CMP_3:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT: br i1 [[CMP_3]], label [[SI_UNFOLD_TRUE:%.*]], label [[SI_UNFOLD_FALSE:%.*]]
; CHECK: si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE2:%.*]]
; CHECK: si.unfold.false:
; CHECK-NEXT: br i1 [[CMP_2]], label [[FOR_INC_JT3]], label [[SI_UNFOLD_FALSE1:%.*]]
; CHECK: si.unfold.false1:
; CHECK-NEXT: br label [[FOR_INC_JT4]]
; CHECK: si.unfold.false2:
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.inc.jt4:
; CHECK-NEXT: [[STATE_NEXT_JT4]] = phi i32 [ 4, [[SI_UNFOLD_FALSE1]] ]
; CHECK-NEXT: [[INC_JT4]] = add nsw i32 [[COUNT4]], 1
; CHECK-NEXT: [[CMP_EXIT_JT4:%.*]] = icmp slt i32 [[INC_JT4]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT4]], label [[FOR_BODY_JT4:%.*]], label [[FOR_END]]
; CHECK: for.inc.jt3:
; CHECK-NEXT: [[STATE_NEXT_JT3]] = phi i32 [ 3, [[SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT4]], 1
; CHECK-NEXT: [[CMP_EXIT_JT3:%.*]] = icmp slt i32 [[INC_JT3]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT3]], label [[FOR_BODY_JT3:%.*]], label [[FOR_END]]
; CHECK: for.inc.jt2:
; CHECK-NEXT: [[COUNT6:%.*]] = phi i32 [ [[COUNT4]], [[SI_UNFOLD_FALSE2]] ], [ [[COUNT5]], [[CASE1]] ]
; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ 2, [[SI_UNFOLD_FALSE2]] ]
; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT6]], 1
; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
; CHECK: for.inc.jt1:
; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT_JT4]], [[FOR_BODY_JT4]] ], [ [[COUNT_JT3]], [[FOR_BODY_JT3]] ], [ [[COUNT4]], [[SI_UNFOLD_TRUE]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ 1, [[SI_UNFOLD_TRUE]] ], [ 1, [[FOR_BODY_JT3]] ], [ 1, [[FOR_BODY_JT4]] ]
; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT3]], 1
; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret i32 0
;
entry:
br label %for.body
for.body:
%count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
switch i32 %state, label %for.inc [
i32 1, label %case1
i32 2, label %case2
]
case1:
br label %for.inc
case2:
%cmp.1 = icmp slt i32 %count, 50
%cmp.2 = icmp slt i32 %count, 100
%0 = and i32 %count, 1
%cmp.3 = icmp eq i32 %0, 0
%sel.1 = select i1 %cmp.1, i32 1, i32 2
%sel.2 = select i1 %cmp.2, i32 3, i32 4
%sel.3 = select i1 %cmp.3, i32 %sel.1, i32 %sel.2
br label %for.inc
for.inc:
%state.next = phi i32 [ %sel.3, %case2 ], [ 1, %for.body ], [ 2, %case1 ]
%inc = add nsw i32 %count, 1
%cmp.exit = icmp slt i32 %inc, %num
br i1 %cmp.exit, label %for.body, label %for.end
for.end:
ret i32 0
}
define void @select_coming_elsewhere(i1 %cond, i16 %a, i16 %b) {
; CHECK-LABEL: @select_coming_elsewhere(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = select i1 [[COND:%.*]], i16 [[A:%.*]], i16 [[B:%.*]]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[E_ADDR_0:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[DIV]], [[LOR_END:%.*]] ]
; CHECK-NEXT: switch i16 [[E_ADDR_0]], label [[LOR_END]] [
; CHECK-NEXT: ]
; CHECK: lor.end:
; CHECK-NEXT: br label [[FOR_COND]]
;
entry:
%div = select i1 %cond, i16 %a, i16 %b
br label %for.cond
for.cond: ; preds = %lor.end, %entry
%e.addr.0 = phi i16 [ 0, %entry ], [ %div, %lor.end ]
switch i16 %e.addr.0, label %lor.end [
]
lor.end: ; preds = %for.cond
br label %for.cond
}
define void @pr65222(i32 %flags, i1 %cmp, i1 %tobool.not) {
; CHECK-LABEL: @pr65222(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: br i1 [[CMP:%.*]], label [[THEN:%.*]], label [[IF_END:%.*]]
; CHECK: then:
; CHECK-NEXT: br i1 [[TOBOOL_NOT:%.*]], label [[SI_UNFOLD_TRUE:%.*]], label [[SI_UNFOLD_FALSE:%.*]]
; CHECK: si.unfold.true:
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END]], label [[SI_UNFOLD_FALSE2:%.*]]
; CHECK: si.unfold.false:
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END]], label [[SI_UNFOLD_FALSE1:%.*]]
; CHECK: si.unfold.false1:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: si.unfold.false2:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[UNFOLDED:%.*]] = phi i32 [ [[FLAGS:%.*]], [[WHILE_COND]] ], [ 3, [[SI_UNFOLD_TRUE]] ], [ 2, [[SI_UNFOLD_FALSE]] ], [ 0, [[SI_UNFOLD_FALSE1]] ], [ 1, [[SI_UNFOLD_FALSE2]] ]
; CHECK-NEXT: [[OTHER:%.*]] = phi i32 [ [[FLAGS]], [[WHILE_COND]] ], [ 0, [[SI_UNFOLD_TRUE]] ], [ 0, [[SI_UNFOLD_FALSE]] ], [ 0, [[SI_UNFOLD_FALSE1]] ], [ 0, [[SI_UNFOLD_FALSE2]] ]
; CHECK-NEXT: switch i32 [[UNFOLDED]], label [[UNREACHABLE:%.*]] [
; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
; CHECK-NEXT: ]
; CHECK: unreachable:
; CHECK-NEXT: unreachable
; CHECK: sw.bb:
; CHECK-NEXT: br label [[WHILE_COND]]
;
entry:
br label %while.cond
while.cond: ; preds = %sw.bb147, %if.end, %entry
br i1 %cmp, label %then, label %if.end
then: ; preds = %while.cond
%cond = select i1 %cmp, i32 2, i32 0
%cond1 = select i1 %cmp, i32 3, i32 1
%tounfold = select i1 %tobool.not, i32 %cond1, i32 %cond
br label %if.end
if.end: ; preds = %then, %while.cond
%unfolded = phi i32 [ %tounfold, %then ], [ %flags, %while.cond ]
%other = phi i32 [ 0, %then ], [ %flags, %while.cond ]
switch i32 %unfolded, label %unreachable [
i32 0, label %sw.bb
]
unreachable:
unreachable
sw.bb: ; preds = %if.end
br label %while.cond
}
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