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llvm-project/llvm/test/Transforms/DFAJumpThreading/dfa-unfold-select.ll
Hongyu Chen a05e004b28
[DFAJumpThreading] Unfold select to the incoming block of phi user (#160987) 
Fixes #160250
We previously assumed the select to unfold is defined in the incoming
block of phi user, as `isValidSelectInst` filters other cases at the
initial stage. However, the selects not defined in the incoming block
may occur after unfolding the arms of the unfolded select.
This patch sinks the select into the incoming block of the phi user and
unfolds it at the incoming block.
2025-10-01 14:06:08 +00:00

550 lines
29 KiB
LLVM
Raw Blame History

; 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]] ], [ [[STATE_NEXT:%.*]], [[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 [[SEL_SI_UNFOLD_FALSE_JT2:%.*]]
; CHECK: sel.si.unfold.false:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: sel.si.unfold.false.jt2:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI_JT2:%.*]] = phi i32 [ 2, [[CASE2]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[STATE_NEXT]] = phi i32 [ poison, [[SEL_SI_UNFOLD_FALSE:%.*]] ]
; 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]], [[SEL_SI_UNFOLD_FALSE_JT2]] ], [ [[COUNT2]], [[CASE1]] ]
; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ [[DOTSI_UNFOLD_PHI_JT2]], [[SEL_SI_UNFOLD_FALSE_JT2]] ]
; 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 [ [[COUNT]], [[FOR_BODY]] ], [ [[COUNT1]], [[CASE2]] ]
; 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]] ], [ [[STATE_NEXT:%.*]], [[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: 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]]
; CHECK: case1:
; CHECK-NEXT: [[COUNT6:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP_C1:%.*]] = icmp slt i32 [[COUNT6]], 50
; CHECK-NEXT: [[CMP2_C1:%.*]] = icmp slt i32 [[COUNT6]], 100
; CHECK-NEXT: br i1 [[CMP2_C1]], label [[STATE1_1_SI_UNFOLD_TRUE_JT1:%.*]], label [[STATE1_2_SI_UNFOLD_FALSE_JT3:%.*]]
; CHECK: case2:
; CHECK-NEXT: [[CMP_C2:%.*]] = icmp slt i32 [[COUNT]], 50
; CHECK-NEXT: [[CMP2_C2:%.*]] = icmp sgt i32 [[COUNT]], 100
; CHECK-NEXT: br i1 [[CMP2_C2]], label [[FOR_INC_JT3]], label [[STATE2_1_SI_UNFOLD_TRUE_JT1:%.*]]
; CHECK: state2.1.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_C2]], label [[STATE2_2_SI_UNFOLD_FALSE:%.*]], label [[STATE2_1_SI_UNFOLD_FALSE_JT2:%.*]]
; CHECK: state2.1.si.unfold.true.jt1:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI_JT1:%.*]] = phi i32 [ 1, [[CASE2]] ]
; CHECK-NEXT: br i1 [[CMP_C2]], label [[STATE2_2_SI_UNFOLD_FALSE_JT1:%.*]], label [[STATE2_1_SI_UNFOLD_FALSE:%.*]]
; CHECK: state2.1.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1:%.*]] = phi i32 [ 2, [[STATE2_1_SI_UNFOLD_TRUE_JT1]] ]
; CHECK-NEXT: br label [[STATE2_2_SI_UNFOLD_FALSE]]
; CHECK: state2.1.si.unfold.false.jt2:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1_JT2:%.*]] = phi i32 [ 2, [[STATE2_1_SI_UNFOLD_TRUE:%.*]] ]
; CHECK-NEXT: br label [[STATE2_2_SI_UNFOLD_FALSE_JT2:%.*]]
; CHECK: state2.2.si.unfold.false:
; CHECK-NEXT: [[STATE2_1_SI_UNFOLD_PHI:%.*]] = phi i32 [ poison, [[STATE2_1_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI1]], [[STATE2_1_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: state2.2.si.unfold.false.jt2:
; CHECK-NEXT: [[STATE2_1_SI_UNFOLD_PHI_JT2:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI1_JT2]], [[STATE2_1_SI_UNFOLD_FALSE_JT2]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: state2.2.si.unfold.false.jt1:
; CHECK-NEXT: [[STATE2_1_SI_UNFOLD_PHI_JT1:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI_JT1]], [[STATE2_1_SI_UNFOLD_TRUE_JT1]] ]
; CHECK-NEXT: br label [[FOR_INC_JT1]]
; CHECK: state1.2.si.unfold.false:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: state1.2.si.unfold.false.jt3:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI2_JT3:%.*]] = phi i32 [ 3, [[CASE1]] ]
; CHECK-NEXT: br label [[FOR_INC_JT3]]
; CHECK: state1.1.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_C1]], label [[FOR_INC]], label [[STATE1_1_SI_UNFOLD_FALSE_JT2:%.*]]
; CHECK: state1.1.si.unfold.true.jt1:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3_JT1:%.*]] = phi i32 [ 1, [[CASE1]] ]
; CHECK-NEXT: br i1 [[CMP_C1]], label [[FOR_INC_JT1]], label [[STATE1_1_SI_UNFOLD_FALSE:%.*]]
; CHECK: state1.1.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI4:%.*]] = phi i32 [ 2, [[STATE1_1_SI_UNFOLD_TRUE_JT1]] ]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: state1.1.si.unfold.false.jt2:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI4_JT2:%.*]] = phi i32 [ 2, [[STATE1_1_SI_UNFOLD_TRUE:%.*]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT3]], [[FOR_BODY_JT3:%.*]] ], [ undef, [[STATE1_1_SI_UNFOLD_TRUE]] ], [ [[COUNT6]], [[STATE1_1_SI_UNFOLD_FALSE]] ], [ undef, [[STATE1_2_SI_UNFOLD_FALSE:%.*]] ], [ [[COUNT]], [[STATE2_2_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[STATE_NEXT]] = phi i32 [ [[STATE2_1_SI_UNFOLD_PHI]], [[STATE2_2_SI_UNFOLD_FALSE]] ], [ poison, [[STATE1_2_SI_UNFOLD_FALSE]] ], [ poison, [[STATE1_1_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI4]], [[STATE1_1_SI_UNFOLD_FALSE]] ], [ 1, [[FOR_BODY_JT3]] ]
; CHECK-NEXT: [[INC]] = add nsw i32 [[COUNT5]], 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: [[STATE_NEXT_JT2]] = phi i32 [ [[STATE2_1_SI_UNFOLD_PHI_JT2]], [[STATE2_2_SI_UNFOLD_FALSE_JT2]] ], [ [[DOTSI_UNFOLD_PHI4_JT2]], [[STATE1_1_SI_UNFOLD_FALSE_JT2]] ]
; CHECK-NEXT: [[INC_JT2]] = add nsw i32 undef, 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: [[COUNT7:%.*]] = phi i32 [ [[COUNT6]], [[STATE1_1_SI_UNFOLD_TRUE_JT1]] ], [ [[COUNT]], [[STATE2_2_SI_UNFOLD_FALSE_JT1]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ [[STATE2_1_SI_UNFOLD_PHI_JT1]], [[STATE2_2_SI_UNFOLD_FALSE_JT1]] ], [ [[DOTSI_UNFOLD_PHI3_JT1]], [[STATE1_1_SI_UNFOLD_TRUE_JT1]] ]
; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT7]], 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.inc.jt3:
; CHECK-NEXT: [[COUNT8:%.*]] = phi i32 [ [[COUNT6]], [[STATE1_2_SI_UNFOLD_FALSE_JT3]] ], [ [[COUNT]], [[CASE2]] ]
; CHECK-NEXT: [[STATE_NEXT_JT3]] = phi i32 [ 3, [[CASE2]] ], [ [[DOTSI_UNFOLD_PHI2_JT3]], [[STATE1_2_SI_UNFOLD_FALSE_JT3]] ]
; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT8]], 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.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]] ], [ [[STATE_NEXT:%.*]], [[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: [[COUNT6:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: case2:
; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[CMP_1:%.*]] = icmp slt i32 [[COUNT5]], 50
; CHECK-NEXT: [[CMP_2:%.*]] = icmp slt i32 [[COUNT5]], 100
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[COUNT5]], 1
; CHECK-NEXT: [[CMP_3:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT: br i1 [[CMP_3]], label [[SEL_1_SI_UNFOLD_TRUE_JT1:%.*]], label [[SEL_2_SI_UNFOLD_TRUE_JT3:%.*]]
; CHECK: sel.2.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_2]], label [[SEL_3_SI_UNFOLD_FALSE:%.*]], label [[SEL_2_SI_UNFOLD_FALSE_JT4:%.*]]
; CHECK: sel.2.si.unfold.true.jt3:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI_JT3:%.*]] = phi i32 [ 3, [[CASE2]] ]
; CHECK-NEXT: br i1 [[CMP_2]], label [[SEL_3_SI_UNFOLD_FALSE_JT3:%.*]], label [[SEL_2_SI_UNFOLD_FALSE:%.*]]
; CHECK: sel.2.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1:%.*]] = phi i32 [ 4, [[SEL_2_SI_UNFOLD_TRUE_JT3]] ]
; CHECK-NEXT: br label [[SEL_3_SI_UNFOLD_FALSE]]
; CHECK: sel.2.si.unfold.false.jt4:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1_JT4:%.*]] = phi i32 [ 4, [[SEL_2_SI_UNFOLD_TRUE:%.*]] ]
; CHECK-NEXT: br label [[SEL_3_SI_UNFOLD_FALSE_JT4:%.*]]
; CHECK: sel.3.si.unfold.false:
; CHECK-NEXT: [[SEL_2_SI_UNFOLD_PHI:%.*]] = phi i32 [ poison, [[SEL_2_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI1]], [[SEL_2_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: sel.3.si.unfold.false.jt4:
; CHECK-NEXT: [[SEL_2_SI_UNFOLD_PHI_JT4:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI1_JT4]], [[SEL_2_SI_UNFOLD_FALSE_JT4]] ]
; CHECK-NEXT: br label [[FOR_INC_JT4]]
; CHECK: sel.3.si.unfold.false.jt3:
; CHECK-NEXT: [[SEL_2_SI_UNFOLD_PHI_JT3:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI_JT3]], [[SEL_2_SI_UNFOLD_TRUE_JT3]] ]
; CHECK-NEXT: br label [[FOR_INC_JT3]]
; CHECK: sel.1.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_INC]], label [[SEL_1_SI_UNFOLD_FALSE_JT2:%.*]]
; CHECK: sel.1.si.unfold.true.jt1:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI2_JT1:%.*]] = phi i32 [ 1, [[CASE2]] ]
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_INC_JT1]], label [[SEL_1_SI_UNFOLD_FALSE:%.*]]
; CHECK: sel.1.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3:%.*]] = phi i32 [ 2, [[SEL_1_SI_UNFOLD_TRUE_JT1]] ]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: sel.1.si.unfold.false.jt2:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3_JT2:%.*]] = phi i32 [ 2, [[SEL_1_SI_UNFOLD_TRUE:%.*]] ]
; CHECK-NEXT: br label [[FOR_INC_JT2]]
; CHECK: for.inc:
; CHECK-NEXT: [[STATE_NEXT]] = phi i32 [ [[SEL_2_SI_UNFOLD_PHI]], [[SEL_3_SI_UNFOLD_FALSE]] ], [ poison, [[SEL_1_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI3]], [[SEL_1_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[INC]] = add nsw i32 [[COUNT5]], 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 [ [[SEL_2_SI_UNFOLD_PHI_JT4]], [[SEL_3_SI_UNFOLD_FALSE_JT4]] ]
; CHECK-NEXT: [[INC_JT4]] = add nsw i32 undef, 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 [ [[SEL_2_SI_UNFOLD_PHI_JT3]], [[SEL_3_SI_UNFOLD_FALSE_JT3]] ]
; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT5]], 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: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ [[DOTSI_UNFOLD_PHI3_JT2]], [[SEL_1_SI_UNFOLD_FALSE_JT2]] ]
; 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: [[COUNT4:%.*]] = phi i32 [ [[COUNT_JT4]], [[FOR_BODY_JT4]] ], [ [[COUNT_JT3]], [[FOR_BODY_JT3]] ], [ [[COUNT5]], [[SEL_1_SI_UNFOLD_TRUE_JT1]] ], [ [[COUNT]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ 1, [[FOR_BODY_JT3]] ], [ 1, [[FOR_BODY_JT4]] ], [ [[DOTSI_UNFOLD_PHI2_JT1]], [[SEL_1_SI_UNFOLD_TRUE_JT1]] ]
; 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:
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 [[COND1_SI_UNFOLD_TRUE:%.*]], label [[COND_SI_UNFOLD_TRUE:%.*]]
; CHECK: cond.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP]], label [[TOUNFOLD_SI_UNFOLD_FALSE1:%.*]], label [[COND_SI_UNFOLD_FALSE_JT0:%.*]]
; CHECK: cond.si.unfold.true.jt2:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI:%.*]] = phi i32 [ 2, [[THEN]] ]
; CHECK-NEXT: br i1 [[CMP]], label [[TOUNFOLD_SI_UNFOLD_FALSE:%.*]], label [[COND_SI_UNFOLD_FALSE:%.*]]
; CHECK: cond.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1:%.*]] = phi i32 [ 0, [[COND_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[TOUNFOLD_SI_UNFOLD_FALSE1]]
; CHECK: cond.si.unfold.false.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1_JT0:%.*]] = phi i32 [ 0, [[COND_SI_UNFOLD_TRUE1:%.*]] ]
; CHECK-NEXT: br label [[TOUNFOLD_SI_UNFOLD_FALSE_JT0:%.*]]
; CHECK: tounfold.si.unfold.false:
; CHECK-NEXT: [[COND_SI_UNFOLD_PHI:%.*]] = phi i32 [ poison, [[COND_SI_UNFOLD_TRUE1]] ], [ [[DOTSI_UNFOLD_PHI1]], [[COND_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: tounfold.si.unfold.false.jt0:
; CHECK-NEXT: [[COND_SI_UNFOLD_PHI_JT0:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI1_JT0]], [[COND_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: br label [[IF_END_JT0:%.*]]
; CHECK: tounfold.si.unfold.false.jt2:
; CHECK-NEXT: [[COND_SI_UNFOLD_PHI_JT2:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI]], [[COND_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[IF_END_JT2:%.*]]
; CHECK: cond1.si.unfold.true:
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END]], label [[COND1_SI_UNFOLD_FALSE_JT1:%.*]]
; CHECK: cond1.si.unfold.true.jt3:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI2:%.*]] = phi i32 [ 3, [[THEN]] ]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END_JT3:%.*]], label [[COND1_SI_UNFOLD_FALSE:%.*]]
; CHECK: cond1.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3:%.*]] = phi i32 [ 1, [[COND1_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: cond1.si.unfold.false.jt1:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3_JT1:%.*]] = phi i32 [ 1, [[COND1_SI_UNFOLD_TRUE1:%.*]] ]
; CHECK-NEXT: br label [[IF_END_JT1:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[UNFOLDED:%.*]] = phi i32 [ [[FLAGS:%.*]], [[WHILE_COND]] ], [ [[COND_SI_UNFOLD_PHI]], [[TOUNFOLD_SI_UNFOLD_FALSE1]] ], [ poison, [[COND1_SI_UNFOLD_TRUE1]] ], [ [[DOTSI_UNFOLD_PHI3]], [[COND1_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[OTHER:%.*]] = phi i32 [ [[FLAGS]], [[WHILE_COND]] ], [ 0, [[TOUNFOLD_SI_UNFOLD_FALSE1]] ], [ 0, [[COND1_SI_UNFOLD_TRUE1]] ], [ 0, [[COND1_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: switch i32 [[UNFOLDED]], label [[UNREACHABLE:%.*]] [
; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
; CHECK-NEXT: ]
; CHECK: if.end.jt1:
; CHECK-NEXT: [[UNFOLDED_JT1:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI3_JT1]], [[COND1_SI_UNFOLD_FALSE_JT1]] ]
; CHECK-NEXT: [[OTHER_JT1:%.*]] = phi i32 [ 0, [[COND1_SI_UNFOLD_FALSE_JT1]] ]
; CHECK-NEXT: br label [[UNREACHABLE]]
; CHECK: if.end.jt3:
; CHECK-NEXT: [[UNFOLDED_JT3:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI2]], [[COND1_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: [[OTHER_JT3:%.*]] = phi i32 [ 0, [[COND1_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[UNREACHABLE]]
; CHECK: if.end.jt0:
; CHECK-NEXT: [[UNFOLDED_JT0:%.*]] = phi i32 [ [[COND_SI_UNFOLD_PHI_JT0]], [[TOUNFOLD_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: [[OTHER_JT0:%.*]] = phi i32 [ 0, [[TOUNFOLD_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: br label [[SW_BB]]
; CHECK: if.end.jt2:
; CHECK-NEXT: [[UNFOLDED_JT2:%.*]] = phi i32 [ [[COND_SI_UNFOLD_PHI_JT2]], [[TOUNFOLD_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: [[OTHER_JT2:%.*]] = phi i32 [ 0, [[TOUNFOLD_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: br label [[UNREACHABLE]]
; 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
}
define i16 @pr160250() {
; CHECK-LABEL: @pr160250(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND48:%.*]]
; CHECK: for.cond48:
; CHECK-NEXT: br i1 false, label [[CLEANUP87_JT0:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.else:
; CHECK-NEXT: br i1 false, label [[DOT6_SI_UNFOLD_TRUE:%.*]], label [[DOT5_SI_UNFOLD_TRUE:%.*]]
; CHECK: .5.si.unfold.true:
; CHECK-NEXT: br i1 false, label [[SPEC_SELECT1_SI_UNFOLD_TRUE1:%.*]], label [[DOT5_SI_UNFOLD_FALSE_JT0:%.*]]
; CHECK: .5.si.unfold.true.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI1:%.*]] = phi i32 [ 0, [[IF_ELSE]] ]
; CHECK-NEXT: br i1 false, label [[SPEC_SELECT1_SI_UNFOLD_TRUE:%.*]], label [[DOT5_SI_UNFOLD_FALSE:%.*]]
; CHECK: .5.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI2:%.*]] = phi i32 [ 0, [[DOT5_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[SPEC_SELECT1_SI_UNFOLD_TRUE1]]
; CHECK: .5.si.unfold.false.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI2_JT0:%.*]] = phi i32 [ 0, [[DOT5_SI_UNFOLD_TRUE1:%.*]] ]
; CHECK-NEXT: br label [[SPEC_SELECT1_SI_UNFOLD_TRUE]]
; CHECK: spec.select1.si.unfold.true:
; CHECK-NEXT: [[DOT5_SI_UNFOLD_PHI:%.*]] = phi i32 [ poison, [[DOT5_SI_UNFOLD_TRUE1]] ], [ [[DOTSI_UNFOLD_PHI2]], [[DOT5_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: br i1 false, label [[SPEC_SELECT_SI_UNFOLD_FALSE1:%.*]], label [[SPEC_SELECT1_SI_UNFOLD_FALSE_JT1:%.*]]
; CHECK: spec.select1.si.unfold.true.jt0:
; CHECK-NEXT: [[DOT5_SI_UNFOLD_PHI_JT0:%.*]] = phi i32 [ [[DOTSI_UNFOLD_PHI1]], [[DOT5_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI2_JT0]], [[DOT5_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: br i1 false, label [[SPEC_SELECT_SI_UNFOLD_FALSE:%.*]], label [[SPEC_SELECT1_SI_UNFOLD_FALSE_JT0:%.*]]
; CHECK: spec.select1.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI:%.*]] = phi i32 [ 0, [[SPEC_SELECT1_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[SPEC_SELECT_SI_UNFOLD_FALSE1]]
; CHECK: spec.select1.si.unfold.false.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI_JT0:%.*]] = phi i32 [ 0, [[SPEC_SELECT1_SI_UNFOLD_TRUE1]] ]
; CHECK-NEXT: br label [[SPEC_SELECT_SI_UNFOLD_FALSE]]
; CHECK: spec.select.si.unfold.false:
; CHECK-NEXT: [[SPEC_SELECT1_SI_UNFOLD_PHI:%.*]] = phi i32 [ [[DOT5_SI_UNFOLD_PHI]], [[SPEC_SELECT1_SI_UNFOLD_TRUE1]] ], [ [[DOTSI_UNFOLD_PHI]], [[SPEC_SELECT1_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: br label [[CLEANUP87:%.*]]
; CHECK: spec.select.si.unfold.false.jt0:
; CHECK-NEXT: [[SPEC_SELECT1_SI_UNFOLD_PHI_JT0:%.*]] = phi i32 [ [[DOT5_SI_UNFOLD_PHI_JT0]], [[SPEC_SELECT1_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI_JT0]], [[SPEC_SELECT1_SI_UNFOLD_FALSE_JT1]] ]
; CHECK-NEXT: br label [[CLEANUP87_JT0]]
; CHECK: .6.si.unfold.true:
; CHECK-NEXT: br i1 false, label [[CLEANUP87]], label [[DOT6_SI_UNFOLD_FALSE_JT0:%.*]]
; CHECK: .6.si.unfold.true.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI3:%.*]] = phi i32 [ 0, [[IF_ELSE]] ]
; CHECK-NEXT: br i1 false, label [[CLEANUP87_JT0]], label [[DOT6_SI_UNFOLD_FALSE:%.*]]
; CHECK: .6.si.unfold.false:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI4:%.*]] = phi i32 [ 0, [[DOT6_SI_UNFOLD_TRUE]] ]
; CHECK-NEXT: br label [[CLEANUP87]]
; CHECK: .6.si.unfold.false.jt0:
; CHECK-NEXT: [[DOTSI_UNFOLD_PHI4_JT0:%.*]] = phi i32 [ 0, [[DOT6_SI_UNFOLD_TRUE1:%.*]] ]
; CHECK-NEXT: br label [[CLEANUP87_JT0]]
; CHECK: cleanup87:
; CHECK-NEXT: [[CLEANUP_DEST_SLOT_3:%.*]] = phi i32 [ [[SPEC_SELECT1_SI_UNFOLD_PHI]], [[SPEC_SELECT_SI_UNFOLD_FALSE1]] ], [ poison, [[DOT6_SI_UNFOLD_TRUE1]] ], [ [[DOTSI_UNFOLD_PHI4]], [[DOT6_SI_UNFOLD_FALSE]] ]
; CHECK-NEXT: switch i32 [[CLEANUP_DEST_SLOT_3]], label [[FOR_COND48_BACKEDGE:%.*]] [
; CHECK-NEXT: i32 0, label [[FOR_COND48_BACKEDGE]]
; CHECK-NEXT: i32 1, label [[FOR_COND48_BACKEDGE]]
; CHECK-NEXT: ]
; CHECK: cleanup87.jt0:
; CHECK-NEXT: [[CLEANUP_DEST_SLOT_3_JT0:%.*]] = phi i32 [ 0, [[FOR_COND48]] ], [ [[SPEC_SELECT1_SI_UNFOLD_PHI_JT0]], [[SPEC_SELECT_SI_UNFOLD_FALSE]] ], [ [[DOTSI_UNFOLD_PHI3]], [[DOT6_SI_UNFOLD_TRUE]] ], [ [[DOTSI_UNFOLD_PHI4_JT0]], [[DOT6_SI_UNFOLD_FALSE_JT0]] ]
; CHECK-NEXT: br label [[FOR_COND48_BACKEDGE]]
; CHECK: for.cond48.backedge:
; CHECK-NEXT: br label [[FOR_COND48]]
;
entry:
%.5 = select i1 false, i32 0, i32 0
%.6 = select i1 false, i32 0, i32 0
br label %for.cond48
for.cond48: ; preds = %for.cond48.backedge, %entry
br i1 false, label %cleanup87, label %if.else
if.else: ; preds = %for.cond48
%spec.select1 = select i1 false, i32 %.5, i32 0
%spec.select = select i1 false, i32 %.6, i32 %spec.select1
br label %cleanup87
cleanup87: ; preds = %if.else, %for.cond48
%cleanup.dest.slot.3 = phi i32 [ 0, %for.cond48 ], [ %spec.select, %if.else ]
switch i32 %cleanup.dest.slot.3, label %for.cond48.backedge [
i32 0, label %for.cond48.backedge
i32 1, label %for.cond48.backedge
]
for.cond48.backedge: ; preds = %cleanup87, %cleanup87, %cleanup87
br label %for.cond48
}
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