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llvm-project/llvm/test/Transforms/LoopUnroll/ARM/multi-blocks.ll
Joel E. Denny 6d44b9082e
[LoopUnroll] Skip remainder loop guard if skip unrolled loop (#156549) 
The original loop (OL) that serves as input to LoopUnroll has basic
blocks that are arranged as follows:

```
OLPreHeader
OLHeader <-.
...        |
OLLatch ---'
OLExit
```

In this depiction, every block has an implicit edge to the next block
below, so any explicit edge indicates a conditional branch.

Given OL and unroll count N, LoopUnroll sometimes creates an unrolled
loop (UL) with a remainder loop (RL) epilogue arranged like this:

```
,-- ULGuard
|   ULPreHeader
|   ULHeader <-.
|   ...        |
|   ULLatch ---'
|   ULExit
`-> RLGuard -----.
    RLPreHeader  |
,-> RLHeader     |
|   ...          |
`-- RLLatch      |
    RLExit       |
    OLExit <-----'
```

Each UL iteration executes N OL iterations, but each RL iteration
executes 1 OL iteration. ULGuard or RLGuard checks whether the first
iteration of UL or RL should execute, respectively. If so, ULLatch or
RLLatch checks whether to execute each subsequent iteration.

Once reached, OL always executes its first iteration but not necessarily
the next N-1 iterations. Thus, ULGuard is always required before the
first UL iteration. However, when control flows from ULGuard directly to
RLGuard, the first OL iteration has yet to execute, so RLGuard is then
redundant before the first RL iteration.

Thus, this patch makes the following changes:
- Adjust ULGuard to branch to RLPreHeader instead of RLGuard, thus
eliminating RLGuard's unnecessary branch instruction for that path.
- Eliminate the creation of RLGuard phi node poison values. Without this
patch, RLGuard has such a phi node for each value that is defined by any
OL iteration and used in OLExit. The poison value is required where
ULGuard is the predecessor. The poison value indicates that control flow
from ULGuard to RLGuard to Exit has no counterpart in OL because the
first OL iteration must execute either in UL or RL.
- Simplify the CFG by not splitting ULExit and RLGuard because, without
the ULGuard predecessor, the single block can now be a dedicated UL
exit.
- To RLPreHeader, add an `llvm.assume` call that asserts the RL trip
count is non-zero. Without this patch, RLPreHeader is reachable only
when RLGuard guarantees that assertion is true. With this patch, RLGuard
guarantees it only when RLGuard is the predecessor, and the OL structure
guarantees it when ULGuard is the predecessor. If RL itself is unrolled
later, this guarantee somehow prevents ScalarEvolution from giving up
when trying to compute a maximum trip count for RL. That maximum trip
count enables the branch instruction in the final unrolled instance of
RLLatch to be eliminated. Without the `llvm.assume` call, some existing
unroll tests start to fail because that instruction is not eliminated.

The original motivation for this patch is to facilitate later patches
that fix LoopUnroll's computation of branch weights so that they
maintain the block frequency of OL's body (see #135812). Specifically,
this patch ensures RLGuard's branch weights do not affect RL's
contribution to the block frequency of OL's body in the case that
ULGuard skips UL.
2025-10-07 10:45:49 -04:00

773 lines
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -mtriple=thumbv8m.main -mcpu=cortex-m33 -passes=loop-unroll -S < %s -o - | FileCheck %s
; RUN: opt -mtriple=thumbv7em -mcpu=cortex-m7 -passes=loop-unroll -S < %s -o - | FileCheck %s
define void @test_three_blocks(ptr nocapture %Output, ptr nocapture readonly %Condition, ptr nocapture readonly %Input, i32 %MaxJ) {
; CHECK-LABEL: @test_three_blocks(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP8:%.*]] = icmp eq i32 [[MAXJ:%.*]], 0
; CHECK-NEXT: br i1 [[CMP8]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[MAXJ]], -1
; CHECK-NEXT: [[XTRAITER:%.*]] = and i32 [[MAXJ]], 3
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], 3
; CHECK-NEXT: br i1 [[TMP1]], label [[FOR_BODY_EPIL_PREHEADER:%.*]], label [[FOR_BODY_PREHEADER_NEW:%.*]]
; CHECK: for.body.preheader.new:
; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i32 [[MAXJ]], [[XTRAITER]]
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.cond.cleanup.loopexit.unr-lcssa:
; CHECK-NEXT: [[TEMP_1_LCSSA_PH_PH:%.*]] = phi i32 [ [[TEMP_1_3:%.*]], [[FOR_INC_3:%.*]] ]
; CHECK-NEXT: [[J_010_UNR_PH:%.*]] = phi i32 [ [[INC_3:%.*]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[TEMP_09_UNR_PH:%.*]] = phi i32 [ [[TEMP_1_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[LCMP_MOD1:%.*]] = icmp ne i32 [[XTRAITER]], 0
; CHECK-NEXT: br i1 [[LCMP_MOD1]], label [[FOR_BODY_EPIL_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK: for.body.epil.preheader:
; CHECK-NEXT: [[J_010_UNR:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[J_010_UNR_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA:%.*]] ]
; CHECK-NEXT: [[TEMP_09_UNR:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[TEMP_09_UNR_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]] ]
; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i32 [[XTRAITER]], 0
; CHECK-NEXT: call void @llvm.assume(i1 [[LCMP_MOD]])
; CHECK-NEXT: br label [[FOR_BODY_EPIL:%.*]]
; CHECK: for.body.epil:
; CHECK-NEXT: [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds i32, ptr [[CONDITION:%.*]], i32 [[J_010_UNR]]
; CHECK-NEXT: [[I_EPIL:%.*]] = load i32, ptr [[ARRAYIDX_EPIL]], align 4
; CHECK-NEXT: [[TOBOOL_EPIL:%.*]] = icmp eq i32 [[I_EPIL]], 0
; CHECK-NEXT: br i1 [[TOBOOL_EPIL]], label [[FOR_INC_EPIL:%.*]], label [[IF_THEN_EPIL:%.*]]
; CHECK: if.then.epil:
; CHECK-NEXT: [[ARRAYIDX1_EPIL:%.*]] = getelementptr inbounds i32, ptr [[INPUT:%.*]], i32 [[J_010_UNR]]
; CHECK-NEXT: [[I1_EPIL:%.*]] = load i32, ptr [[ARRAYIDX1_EPIL]], align 4
; CHECK-NEXT: [[ADD_EPIL:%.*]] = add i32 [[I1_EPIL]], [[TEMP_09_UNR]]
; CHECK-NEXT: br label [[FOR_INC_EPIL]]
; CHECK: for.inc.epil:
; CHECK-NEXT: [[TEMP_1_EPIL:%.*]] = phi i32 [ [[ADD_EPIL]], [[IF_THEN_EPIL]] ], [ [[TEMP_09_UNR]], [[FOR_BODY_EPIL]] ]
; CHECK-NEXT: [[INC_EPIL:%.*]] = add nuw i32 [[J_010_UNR]], 1
; CHECK-NEXT: [[EPIL_ITER_CMP:%.*]] = icmp ne i32 1, [[XTRAITER]]
; CHECK-NEXT: br i1 [[EPIL_ITER_CMP]], label [[FOR_BODY_EPIL_1:%.*]], label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA:%.*]]
; CHECK: for.body.epil.1:
; CHECK-NEXT: [[ARRAYIDX_EPIL_1:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_EPIL]]
; CHECK-NEXT: [[I_EPIL_1:%.*]] = load i32, ptr [[ARRAYIDX_EPIL_1]], align 4
; CHECK-NEXT: [[TOBOOL_EPIL_1:%.*]] = icmp eq i32 [[I_EPIL_1]], 0
; CHECK-NEXT: br i1 [[TOBOOL_EPIL_1]], label [[FOR_INC_EPIL_1:%.*]], label [[IF_THEN_EPIL_1:%.*]]
; CHECK: if.then.epil.1:
; CHECK-NEXT: [[ARRAYIDX1_EPIL_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_EPIL]]
; CHECK-NEXT: [[I1_EPIL_1:%.*]] = load i32, ptr [[ARRAYIDX1_EPIL_1]], align 4
; CHECK-NEXT: [[ADD_EPIL_1:%.*]] = add i32 [[I1_EPIL_1]], [[TEMP_1_EPIL]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_1]]
; CHECK: for.inc.epil.1:
; CHECK-NEXT: [[TEMP_1_EPIL_1:%.*]] = phi i32 [ [[ADD_EPIL_1]], [[IF_THEN_EPIL_1]] ], [ [[TEMP_1_EPIL]], [[FOR_BODY_EPIL_1]] ]
; CHECK-NEXT: [[INC_EPIL_1:%.*]] = add nuw i32 [[J_010_UNR]], 2
; CHECK-NEXT: [[EPIL_ITER_CMP_1:%.*]] = icmp ne i32 2, [[XTRAITER]]
; CHECK-NEXT: br i1 [[EPIL_ITER_CMP_1]], label [[FOR_BODY_EPIL_2:%.*]], label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]]
; CHECK: for.body.epil.2:
; CHECK-NEXT: [[ARRAYIDX_EPIL_2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_EPIL_1]]
; CHECK-NEXT: [[I_EPIL_2:%.*]] = load i32, ptr [[ARRAYIDX_EPIL_2]], align 4
; CHECK-NEXT: [[TOBOOL_EPIL_2:%.*]] = icmp eq i32 [[I_EPIL_2]], 0
; CHECK-NEXT: br i1 [[TOBOOL_EPIL_2]], label [[FOR_INC_EPIL_2:%.*]], label [[IF_THEN_EPIL_2:%.*]]
; CHECK: if.then.epil.2:
; CHECK-NEXT: [[ARRAYIDX1_EPIL_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_EPIL_1]]
; CHECK-NEXT: [[I1_EPIL_2:%.*]] = load i32, ptr [[ARRAYIDX1_EPIL_2]], align 4
; CHECK-NEXT: [[ADD_EPIL_2:%.*]] = add i32 [[I1_EPIL_2]], [[TEMP_1_EPIL_1]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_2]]
; CHECK: for.inc.epil.2:
; CHECK-NEXT: [[TEMP_1_EPIL_2:%.*]] = phi i32 [ [[ADD_EPIL_2]], [[IF_THEN_EPIL_2]] ], [ [[TEMP_1_EPIL_1]], [[FOR_BODY_EPIL_2]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]]
; CHECK: for.cond.cleanup.loopexit.epilog-lcssa:
; CHECK-NEXT: [[TEMP_1_LCSSA_PH1:%.*]] = phi i32 [ [[TEMP_1_EPIL]], [[FOR_INC_EPIL]] ], [ [[TEMP_1_EPIL_1]], [[FOR_INC_EPIL_1]] ], [ [[TEMP_1_EPIL_2]], [[FOR_INC_EPIL_2]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP_LOOPEXIT]]
; CHECK: for.cond.cleanup.loopexit:
; CHECK-NEXT: [[TEMP_1_LCSSA:%.*]] = phi i32 [ [[TEMP_1_LCSSA_PH_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]] ], [ [[TEMP_1_LCSSA_PH1]], [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: [[TEMP_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TEMP_1_LCSSA]], [[FOR_COND_CLEANUP_LOOPEXIT]] ]
; CHECK-NEXT: store i32 [[TEMP_0_LCSSA]], ptr [[OUTPUT:%.*]], align 4
; CHECK-NEXT: ret void
; CHECK: for.body:
; CHECK-NEXT: [[J_010:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[INC_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[TEMP_09:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[TEMP_1_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[NITER:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[NITER_NEXT_3:%.*]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[J_010]]
; CHECK-NEXT: [[I:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[I]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[FOR_INC:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[J_010]]
; CHECK-NEXT: [[I1:%.*]] = load i32, ptr [[ARRAYIDX1]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[I1]], [[TEMP_09]]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[TEMP_1:%.*]] = phi i32 [ [[ADD]], [[IF_THEN]] ], [ [[TEMP_09]], [[FOR_BODY]] ]
; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i32 [[J_010]], 1
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC]]
; CHECK-NEXT: [[I_1:%.*]] = load i32, ptr [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[TOBOOL_1:%.*]] = icmp eq i32 [[I_1]], 0
; CHECK-NEXT: br i1 [[TOBOOL_1]], label [[FOR_INC_1:%.*]], label [[IF_THEN_1:%.*]]
; CHECK: if.then.1:
; CHECK-NEXT: [[ARRAYIDX1_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC]]
; CHECK-NEXT: [[I1_1:%.*]] = load i32, ptr [[ARRAYIDX1_1]], align 4
; CHECK-NEXT: [[ADD_1:%.*]] = add i32 [[I1_1]], [[TEMP_1]]
; CHECK-NEXT: br label [[FOR_INC_1]]
; CHECK: for.inc.1:
; CHECK-NEXT: [[TEMP_1_1:%.*]] = phi i32 [ [[ADD_1]], [[IF_THEN_1]] ], [ [[TEMP_1]], [[FOR_INC]] ]
; CHECK-NEXT: [[INC_1:%.*]] = add nuw nsw i32 [[J_010]], 2
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_1]]
; CHECK-NEXT: [[I_2:%.*]] = load i32, ptr [[ARRAYIDX_2]], align 4
; CHECK-NEXT: [[TOBOOL_2:%.*]] = icmp eq i32 [[I_2]], 0
; CHECK-NEXT: br i1 [[TOBOOL_2]], label [[FOR_INC_2:%.*]], label [[IF_THEN_2:%.*]]
; CHECK: if.then.2:
; CHECK-NEXT: [[ARRAYIDX1_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_1]]
; CHECK-NEXT: [[I1_2:%.*]] = load i32, ptr [[ARRAYIDX1_2]], align 4
; CHECK-NEXT: [[ADD_2:%.*]] = add i32 [[I1_2]], [[TEMP_1_1]]
; CHECK-NEXT: br label [[FOR_INC_2]]
; CHECK: for.inc.2:
; CHECK-NEXT: [[TEMP_1_2:%.*]] = phi i32 [ [[ADD_2]], [[IF_THEN_2]] ], [ [[TEMP_1_1]], [[FOR_INC_1]] ]
; CHECK-NEXT: [[INC_2:%.*]] = add nuw nsw i32 [[J_010]], 3
; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_2]]
; CHECK-NEXT: [[I_3:%.*]] = load i32, ptr [[ARRAYIDX_3]], align 4
; CHECK-NEXT: [[TOBOOL_3:%.*]] = icmp eq i32 [[I_3]], 0
; CHECK-NEXT: br i1 [[TOBOOL_3]], label [[FOR_INC_3]], label [[IF_THEN_3:%.*]]
; CHECK: if.then.3:
; CHECK-NEXT: [[ARRAYIDX1_3:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_2]]
; CHECK-NEXT: [[I1_3:%.*]] = load i32, ptr [[ARRAYIDX1_3]], align 4
; CHECK-NEXT: [[ADD_3:%.*]] = add i32 [[I1_3]], [[TEMP_1_2]]
; CHECK-NEXT: br label [[FOR_INC_3]]
; CHECK: for.inc.3:
; CHECK-NEXT: [[TEMP_1_3]] = phi i32 [ [[ADD_3]], [[IF_THEN_3]] ], [ [[TEMP_1_2]], [[FOR_INC_2]] ]
; CHECK-NEXT: [[INC_3]] = add nuw i32 [[J_010]], 4
; CHECK-NEXT: [[NITER_NEXT_3]] = add i32 [[NITER]], 4
; CHECK-NEXT: [[NITER_NCMP_3:%.*]] = icmp eq i32 [[NITER_NEXT_3]], [[UNROLL_ITER]]
; CHECK-NEXT: br i1 [[NITER_NCMP_3]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]], label [[FOR_BODY]]
;
entry:
%cmp8 = icmp eq i32 %MaxJ, 0
br i1 %cmp8, label %for.cond.cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.1, %for.inc ]
store i32 %temp.0.lcssa, ptr %Output, align 4
ret void
for.body: ; preds = %for.inc, %for.body.preheader
%j.010 = phi i32 [ %inc, %for.inc ], [ 0, %for.body.preheader ]
%temp.09 = phi i32 [ %temp.1, %for.inc ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %Condition, i32 %j.010
%i = load i32, ptr %arrayidx, align 4
%tobool = icmp eq i32 %i, 0
br i1 %tobool, label %for.inc, label %if.then
if.then: ; preds = %for.body
%arrayidx1 = getelementptr inbounds i32, ptr %Input, i32 %j.010
%i1 = load i32, ptr %arrayidx1, align 4
%add = add i32 %i1, %temp.09
br label %for.inc
for.inc: ; preds = %if.then, %for.body
%temp.1 = phi i32 [ %add, %if.then ], [ %temp.09, %for.body ]
%inc = add nuw i32 %j.010, 1
%exitcond = icmp eq i32 %inc, %MaxJ
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
define void @test_two_exits(ptr nocapture %Output, ptr nocapture readonly %Condition, ptr nocapture readonly %Input, i32 %MaxJ) {
; CHECK-LABEL: @test_two_exits(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP14:%.*]] = icmp eq i32 [[MAXJ:%.*]], 0
; CHECK-NEXT: br i1 [[CMP14]], label [[CLEANUP:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[J_016:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INC_3:%.*]], [[IF_END_3:%.*]] ]
; CHECK-NEXT: [[TEMP_015:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[TEMP_0_ADD_3:%.*]], [[IF_END_3]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[INPUT:%.*]], i32 [[J_016]]
; CHECK-NEXT: [[I:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[I]], 65535
; CHECK-NEXT: br i1 [[CMP1]], label [[CLEANUP_LOOPEXIT:%.*]], label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION:%.*]], i32 [[J_016]]
; CHECK-NEXT: [[I1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[I1]], 0
; CHECK-NEXT: [[ADD:%.*]] = select i1 [[TOBOOL]], i32 0, i32 [[I]]
; CHECK-NEXT: [[TEMP_0_ADD:%.*]] = add i32 [[ADD]], [[TEMP_015]]
; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i32 [[J_016]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[INC]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_1:%.*]], label [[CLEANUP_LOOPEXIT]]
; CHECK: for.body.1:
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC]]
; CHECK-NEXT: [[I_1:%.*]] = load i32, ptr [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[CMP1_1:%.*]] = icmp ugt i32 [[I_1]], 65535
; CHECK-NEXT: br i1 [[CMP1_1]], label [[CLEANUP_LOOPEXIT]], label [[IF_END_1:%.*]]
; CHECK: if.end.1:
; CHECK-NEXT: [[ARRAYIDX2_1:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC]]
; CHECK-NEXT: [[I1_1:%.*]] = load i32, ptr [[ARRAYIDX2_1]], align 4
; CHECK-NEXT: [[TOBOOL_1:%.*]] = icmp eq i32 [[I1_1]], 0
; CHECK-NEXT: [[ADD_1:%.*]] = select i1 [[TOBOOL_1]], i32 0, i32 [[I_1]]
; CHECK-NEXT: [[TEMP_0_ADD_1:%.*]] = add i32 [[ADD_1]], [[TEMP_0_ADD]]
; CHECK-NEXT: [[INC_1:%.*]] = add nuw nsw i32 [[J_016]], 2
; CHECK-NEXT: [[CMP_1:%.*]] = icmp ult i32 [[INC_1]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_BODY_2:%.*]], label [[CLEANUP_LOOPEXIT]]
; CHECK: for.body.2:
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_1]]
; CHECK-NEXT: [[I_2:%.*]] = load i32, ptr [[ARRAYIDX_2]], align 4
; CHECK-NEXT: [[CMP1_2:%.*]] = icmp ugt i32 [[I_2]], 65535
; CHECK-NEXT: br i1 [[CMP1_2]], label [[CLEANUP_LOOPEXIT]], label [[IF_END_2:%.*]]
; CHECK: if.end.2:
; CHECK-NEXT: [[ARRAYIDX2_2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_1]]
; CHECK-NEXT: [[I1_2:%.*]] = load i32, ptr [[ARRAYIDX2_2]], align 4
; CHECK-NEXT: [[TOBOOL_2:%.*]] = icmp eq i32 [[I1_2]], 0
; CHECK-NEXT: [[ADD_2:%.*]] = select i1 [[TOBOOL_2]], i32 0, i32 [[I_2]]
; CHECK-NEXT: [[TEMP_0_ADD_2:%.*]] = add i32 [[ADD_2]], [[TEMP_0_ADD_1]]
; CHECK-NEXT: [[INC_2:%.*]] = add nuw nsw i32 [[J_016]], 3
; CHECK-NEXT: [[CMP_2:%.*]] = icmp ult i32 [[INC_2]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP_2]], label [[FOR_BODY_3:%.*]], label [[CLEANUP_LOOPEXIT]]
; CHECK: for.body.3:
; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_2]]
; CHECK-NEXT: [[I_3:%.*]] = load i32, ptr [[ARRAYIDX_3]], align 4
; CHECK-NEXT: [[CMP1_3:%.*]] = icmp ugt i32 [[I_3]], 65535
; CHECK-NEXT: br i1 [[CMP1_3]], label [[CLEANUP_LOOPEXIT]], label [[IF_END_3]]
; CHECK: if.end.3:
; CHECK-NEXT: [[ARRAYIDX2_3:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_2]]
; CHECK-NEXT: [[I1_3:%.*]] = load i32, ptr [[ARRAYIDX2_3]], align 4
; CHECK-NEXT: [[TOBOOL_3:%.*]] = icmp eq i32 [[I1_3]], 0
; CHECK-NEXT: [[ADD_3:%.*]] = select i1 [[TOBOOL_3]], i32 0, i32 [[I_3]]
; CHECK-NEXT: [[TEMP_0_ADD_3]] = add i32 [[ADD_3]], [[TEMP_0_ADD_2]]
; CHECK-NEXT: [[INC_3]] = add nuw i32 [[J_016]], 4
; CHECK-NEXT: [[CMP_3:%.*]] = icmp ult i32 [[INC_3]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP_3]], label [[FOR_BODY]], label [[CLEANUP_LOOPEXIT]]
; CHECK: cleanup.loopexit:
; CHECK-NEXT: [[TEMP_0_LCSSA_PH:%.*]] = phi i32 [ [[TEMP_0_ADD]], [[IF_END]] ], [ [[TEMP_015]], [[FOR_BODY]] ], [ [[TEMP_0_ADD]], [[FOR_BODY_1]] ], [ [[TEMP_0_ADD_1]], [[IF_END_1]] ], [ [[TEMP_0_ADD_1]], [[FOR_BODY_2]] ], [ [[TEMP_0_ADD_2]], [[IF_END_2]] ], [ [[TEMP_0_ADD_2]], [[FOR_BODY_3]] ], [ [[TEMP_0_ADD_3]], [[IF_END_3]] ]
; CHECK-NEXT: br label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[TEMP_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TEMP_0_LCSSA_PH]], [[CLEANUP_LOOPEXIT]] ]
; CHECK-NEXT: store i32 [[TEMP_0_LCSSA]], ptr [[OUTPUT:%.*]], align 4
; CHECK-NEXT: ret void
;
entry:
%cmp14 = icmp eq i32 %MaxJ, 0
br i1 %cmp14, label %cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %if.end, %for.body.preheader
%j.016 = phi i32 [ %inc, %if.end ], [ 0, %for.body.preheader ]
%temp.015 = phi i32 [ %temp.0.add, %if.end ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %Input, i32 %j.016
%i = load i32, ptr %arrayidx, align 4
%cmp1 = icmp ugt i32 %i, 65535
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, ptr %Condition, i32 %j.016
%i1 = load i32, ptr %arrayidx2, align 4
%tobool = icmp eq i32 %i1, 0
%add = select i1 %tobool, i32 0, i32 %i
%temp.0.add = add i32 %add, %temp.015
%inc = add nuw i32 %j.016, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %if.end, %for.body, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.015, %for.body ], [ %temp.0.add, %if.end ]
store i32 %temp.0.lcssa, ptr %Output, align 4
ret void
}
define void @test_three_exits(ptr nocapture %Output, ptr nocapture readonly %Condition, ptr nocapture readonly %Input, i32 %MaxJ) {
; CHECK-LABEL: @test_three_exits(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP20:%.*]] = icmp eq i32 [[MAXJ:%.*]], 0
; CHECK-NEXT: br i1 [[CMP20]], label [[CLEANUP:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[J_022:%.*]] = phi i32 [ [[INC:%.*]], [[IF_END5:%.*]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[TEMP_021:%.*]] = phi i32 [ [[TEMP_0_ADD:%.*]], [[IF_END5]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[CONDITION:%.*]], i32 [[J_022]]
; CHECK-NEXT: [[I:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[I]], 65535
; CHECK-NEXT: br i1 [[CMP1]], label [[CLEANUP_LOOPEXIT:%.*]], label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[INPUT:%.*]], i32 [[J_022]]
; CHECK-NEXT: [[I1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[CMP3:%.*]] = icmp ugt i32 [[I1]], 65535
; CHECK-NEXT: br i1 [[CMP3]], label [[CLEANUP_LOOPEXIT]], label [[IF_END5]]
; CHECK: if.end5:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[I]], 0
; CHECK-NEXT: [[ADD:%.*]] = select i1 [[TOBOOL]], i32 0, i32 [[I1]]
; CHECK-NEXT: [[TEMP_0_ADD]] = add i32 [[ADD]], [[TEMP_021]]
; CHECK-NEXT: [[INC]] = add nuw i32 [[J_022]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[INC]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP_LOOPEXIT]]
; CHECK: cleanup.loopexit:
; CHECK-NEXT: [[TEMP_0_LCSSA_PH:%.*]] = phi i32 [ [[TEMP_0_ADD]], [[IF_END5]] ], [ [[TEMP_021]], [[FOR_BODY]] ], [ [[TEMP_021]], [[IF_END]] ]
; CHECK-NEXT: br label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[TEMP_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TEMP_0_LCSSA_PH]], [[CLEANUP_LOOPEXIT]] ]
; CHECK-NEXT: store i32 [[TEMP_0_LCSSA]], ptr [[OUTPUT:%.*]], align 4
; CHECK-NEXT: ret void
;
entry:
%cmp20 = icmp eq i32 %MaxJ, 0
br i1 %cmp20, label %cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %if.end5, %for.body.preheader
%j.022 = phi i32 [ %inc, %if.end5 ], [ 0, %for.body.preheader ]
%temp.021 = phi i32 [ %temp.0.add, %if.end5 ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %Condition, i32 %j.022
%i = load i32, ptr %arrayidx, align 4
%cmp1 = icmp ugt i32 %i, 65535
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, ptr %Input, i32 %j.022
%i1 = load i32, ptr %arrayidx2, align 4
%cmp3 = icmp ugt i32 %i1, 65535
br i1 %cmp3, label %cleanup, label %if.end5
if.end5: ; preds = %if.end
%tobool = icmp eq i32 %i, 0
%add = select i1 %tobool, i32 0, i32 %i1
%temp.0.add = add i32 %add, %temp.021
%inc = add nuw i32 %j.022, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %if.end5, %if.end, %for.body, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.021, %if.end ], [ %temp.021, %for.body ], [ %temp.0.add, %if.end5 ]
store i32 %temp.0.lcssa, ptr %Output, align 4
ret void
}
define void @test_four_blocks(ptr nocapture %Output, ptr nocapture readonly %Condition, ptr nocapture readonly %Input, i32 %MaxJ) {
; CHECK-LABEL: @test_four_blocks(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP25:%.*]] = icmp ugt i32 [[MAXJ:%.*]], 1
; CHECK-NEXT: br i1 [[CMP25]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr [[INPUT:%.*]], align 4
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[MAXJ]], -1
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[MAXJ]], -2
; CHECK-NEXT: [[XTRAITER:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[TMP1]], 3
; CHECK-NEXT: br i1 [[TMP2]], label [[FOR_BODY_EPIL_PREHEADER:%.*]], label [[FOR_BODY_LR_PH_NEW:%.*]]
; CHECK: for.body.lr.ph.new:
; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i32 [[TMP0]], [[XTRAITER]]
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.cond.cleanup.loopexit.unr-lcssa:
; CHECK-NEXT: [[TEMP_1_LCSSA_PH_PH:%.*]] = phi i32 [ [[TEMP_1_3:%.*]], [[FOR_INC_3:%.*]] ]
; CHECK-NEXT: [[I_UNR_PH:%.*]] = phi i32 [ [[I2_3:%.*]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[J_027_UNR_PH:%.*]] = phi i32 [ [[INC_3:%.*]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[TEMP_026_UNR_PH:%.*]] = phi i32 [ [[TEMP_1_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[LCMP_MOD1:%.*]] = icmp ne i32 [[XTRAITER]], 0
; CHECK-NEXT: br i1 [[LCMP_MOD1]], label [[FOR_BODY_EPIL_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK: for.body.epil.preheader:
; CHECK-NEXT: [[I_UNR:%.*]] = phi i32 [ [[DOTPRE]], [[FOR_BODY_LR_PH]] ], [ [[I_UNR_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA:%.*]] ]
; CHECK-NEXT: [[J_027_UNR:%.*]] = phi i32 [ 1, [[FOR_BODY_LR_PH]] ], [ [[J_027_UNR_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]] ]
; CHECK-NEXT: [[TEMP_026_UNR:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[TEMP_026_UNR_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]] ]
; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i32 [[XTRAITER]], 0
; CHECK-NEXT: call void @llvm.assume(i1 [[LCMP_MOD]])
; CHECK-NEXT: br label [[FOR_BODY_EPIL:%.*]]
; CHECK: for.body.epil:
; CHECK-NEXT: [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds i32, ptr [[CONDITION:%.*]], i32 [[J_027_UNR]]
; CHECK-NEXT: [[I1_EPIL:%.*]] = load i32, ptr [[ARRAYIDX_EPIL]], align 4
; CHECK-NEXT: [[CMP1_EPIL:%.*]] = icmp ugt i32 [[I1_EPIL]], 65535
; CHECK-NEXT: [[ARRAYIDX2_EPIL:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[J_027_UNR]]
; CHECK-NEXT: [[I2_EPIL:%.*]] = load i32, ptr [[ARRAYIDX2_EPIL]], align 4
; CHECK-NEXT: [[CMP4_EPIL:%.*]] = icmp ugt i32 [[I2_EPIL]], [[I_UNR]]
; CHECK-NEXT: br i1 [[CMP1_EPIL]], label [[IF_THEN_EPIL:%.*]], label [[IF_ELSE_EPIL:%.*]]
; CHECK: if.else.epil:
; CHECK-NEXT: [[NOT_CMP4_EPIL:%.*]] = xor i1 [[CMP4_EPIL]], true
; CHECK-NEXT: [[SUB_EPIL:%.*]] = sext i1 [[NOT_CMP4_EPIL]] to i32
; CHECK-NEXT: [[SUB10_SINK_EPIL:%.*]] = add i32 [[J_027_UNR]], [[SUB_EPIL]]
; CHECK-NEXT: [[ARRAYIDX11_EPIL:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_EPIL]]
; CHECK-NEXT: [[I3_EPIL:%.*]] = load i32, ptr [[ARRAYIDX11_EPIL]], align 4
; CHECK-NEXT: [[SUB13_EPIL:%.*]] = sub i32 [[TEMP_026_UNR]], [[I3_EPIL]]
; CHECK-NEXT: br label [[FOR_INC_EPIL:%.*]]
; CHECK: if.then.epil:
; CHECK-NEXT: [[COND_EPIL:%.*]] = zext i1 [[CMP4_EPIL]] to i32
; CHECK-NEXT: [[ADD_EPIL:%.*]] = add i32 [[TEMP_026_UNR]], [[COND_EPIL]]
; CHECK-NEXT: br label [[FOR_INC_EPIL]]
; CHECK: for.inc.epil:
; CHECK-NEXT: [[TEMP_1_EPIL:%.*]] = phi i32 [ [[ADD_EPIL]], [[IF_THEN_EPIL]] ], [ [[SUB13_EPIL]], [[IF_ELSE_EPIL]] ]
; CHECK-NEXT: [[INC_EPIL:%.*]] = add nuw i32 [[J_027_UNR]], 1
; CHECK-NEXT: [[EPIL_ITER_CMP:%.*]] = icmp ne i32 1, [[XTRAITER]]
; CHECK-NEXT: br i1 [[EPIL_ITER_CMP]], label [[FOR_BODY_EPIL_1:%.*]], label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA:%.*]]
; CHECK: for.body.epil.1:
; CHECK-NEXT: [[ARRAYIDX_EPIL_1:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_EPIL]]
; CHECK-NEXT: [[I1_EPIL_1:%.*]] = load i32, ptr [[ARRAYIDX_EPIL_1]], align 4
; CHECK-NEXT: [[CMP1_EPIL_1:%.*]] = icmp ugt i32 [[I1_EPIL_1]], 65535
; CHECK-NEXT: [[ARRAYIDX2_EPIL_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_EPIL]]
; CHECK-NEXT: [[I2_EPIL_1:%.*]] = load i32, ptr [[ARRAYIDX2_EPIL_1]], align 4
; CHECK-NEXT: [[CMP4_EPIL_1:%.*]] = icmp ugt i32 [[I2_EPIL_1]], [[I2_EPIL]]
; CHECK-NEXT: br i1 [[CMP1_EPIL_1]], label [[IF_THEN_EPIL_1:%.*]], label [[IF_ELSE_EPIL_1:%.*]]
; CHECK: if.else.epil.1:
; CHECK-NEXT: [[NOT_CMP4_EPIL_1:%.*]] = xor i1 [[CMP4_EPIL_1]], true
; CHECK-NEXT: [[SUB_EPIL_1:%.*]] = sext i1 [[NOT_CMP4_EPIL_1]] to i32
; CHECK-NEXT: [[SUB10_SINK_EPIL_1:%.*]] = add i32 [[INC_EPIL]], [[SUB_EPIL_1]]
; CHECK-NEXT: [[ARRAYIDX11_EPIL_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_EPIL_1]]
; CHECK-NEXT: [[I3_EPIL_1:%.*]] = load i32, ptr [[ARRAYIDX11_EPIL_1]], align 4
; CHECK-NEXT: [[SUB13_EPIL_1:%.*]] = sub i32 [[TEMP_1_EPIL]], [[I3_EPIL_1]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_1:%.*]]
; CHECK: if.then.epil.1:
; CHECK-NEXT: [[COND_EPIL_1:%.*]] = zext i1 [[CMP4_EPIL_1]] to i32
; CHECK-NEXT: [[ADD_EPIL_1:%.*]] = add i32 [[TEMP_1_EPIL]], [[COND_EPIL_1]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_1]]
; CHECK: for.inc.epil.1:
; CHECK-NEXT: [[TEMP_1_EPIL_1:%.*]] = phi i32 [ [[ADD_EPIL_1]], [[IF_THEN_EPIL_1]] ], [ [[SUB13_EPIL_1]], [[IF_ELSE_EPIL_1]] ]
; CHECK-NEXT: [[INC_EPIL_1:%.*]] = add nuw i32 [[J_027_UNR]], 2
; CHECK-NEXT: [[EPIL_ITER_CMP_1:%.*]] = icmp ne i32 2, [[XTRAITER]]
; CHECK-NEXT: br i1 [[EPIL_ITER_CMP_1]], label [[FOR_BODY_EPIL_2:%.*]], label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]]
; CHECK: for.body.epil.2:
; CHECK-NEXT: [[ARRAYIDX_EPIL_2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_EPIL_1]]
; CHECK-NEXT: [[I1_EPIL_2:%.*]] = load i32, ptr [[ARRAYIDX_EPIL_2]], align 4
; CHECK-NEXT: [[CMP1_EPIL_2:%.*]] = icmp ugt i32 [[I1_EPIL_2]], 65535
; CHECK-NEXT: [[ARRAYIDX2_EPIL_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_EPIL_1]]
; CHECK-NEXT: [[I2_EPIL_2:%.*]] = load i32, ptr [[ARRAYIDX2_EPIL_2]], align 4
; CHECK-NEXT: [[CMP4_EPIL_2:%.*]] = icmp ugt i32 [[I2_EPIL_2]], [[I2_EPIL_1]]
; CHECK-NEXT: br i1 [[CMP1_EPIL_2]], label [[IF_THEN_EPIL_2:%.*]], label [[IF_ELSE_EPIL_2:%.*]]
; CHECK: if.else.epil.2:
; CHECK-NEXT: [[NOT_CMP4_EPIL_2:%.*]] = xor i1 [[CMP4_EPIL_2]], true
; CHECK-NEXT: [[SUB_EPIL_2:%.*]] = sext i1 [[NOT_CMP4_EPIL_2]] to i32
; CHECK-NEXT: [[SUB10_SINK_EPIL_2:%.*]] = add i32 [[INC_EPIL_1]], [[SUB_EPIL_2]]
; CHECK-NEXT: [[ARRAYIDX11_EPIL_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_EPIL_2]]
; CHECK-NEXT: [[I3_EPIL_2:%.*]] = load i32, ptr [[ARRAYIDX11_EPIL_2]], align 4
; CHECK-NEXT: [[SUB13_EPIL_2:%.*]] = sub i32 [[TEMP_1_EPIL_1]], [[I3_EPIL_2]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_2:%.*]]
; CHECK: if.then.epil.2:
; CHECK-NEXT: [[COND_EPIL_2:%.*]] = zext i1 [[CMP4_EPIL_2]] to i32
; CHECK-NEXT: [[ADD_EPIL_2:%.*]] = add i32 [[TEMP_1_EPIL_1]], [[COND_EPIL_2]]
; CHECK-NEXT: br label [[FOR_INC_EPIL_2]]
; CHECK: for.inc.epil.2:
; CHECK-NEXT: [[TEMP_1_EPIL_2:%.*]] = phi i32 [ [[ADD_EPIL_2]], [[IF_THEN_EPIL_2]] ], [ [[SUB13_EPIL_2]], [[IF_ELSE_EPIL_2]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]]
; CHECK: for.cond.cleanup.loopexit.epilog-lcssa:
; CHECK-NEXT: [[TEMP_1_LCSSA_PH1:%.*]] = phi i32 [ [[TEMP_1_EPIL]], [[FOR_INC_EPIL]] ], [ [[TEMP_1_EPIL_1]], [[FOR_INC_EPIL_1]] ], [ [[TEMP_1_EPIL_2]], [[FOR_INC_EPIL_2]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP_LOOPEXIT]]
; CHECK: for.cond.cleanup.loopexit:
; CHECK-NEXT: [[TEMP_1_LCSSA:%.*]] = phi i32 [ [[TEMP_1_LCSSA_PH_PH]], [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]] ], [ [[TEMP_1_LCSSA_PH1]], [[FOR_COND_CLEANUP_LOOPEXIT_EPILOG_LCSSA]] ]
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: [[TEMP_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TEMP_1_LCSSA]], [[FOR_COND_CLEANUP_LOOPEXIT]] ]
; CHECK-NEXT: store i32 [[TEMP_0_LCSSA]], ptr [[OUTPUT:%.*]], align 4
; CHECK-NEXT: ret void
; CHECK: for.body:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[DOTPRE]], [[FOR_BODY_LR_PH_NEW]] ], [ [[I2_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[J_027:%.*]] = phi i32 [ 1, [[FOR_BODY_LR_PH_NEW]] ], [ [[INC_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[TEMP_026:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH_NEW]] ], [ [[TEMP_1_3]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[NITER:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH_NEW]] ], [ [[NITER_NEXT_3:%.*]], [[FOR_INC_3]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[J_027]]
; CHECK-NEXT: [[I1:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[I1]], 65535
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[J_027]]
; CHECK-NEXT: [[I2:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[CMP4:%.*]] = icmp ugt i32 [[I2]], [[I]]
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[COND:%.*]] = zext i1 [[CMP4]] to i32
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[TEMP_026]], [[COND]]
; CHECK-NEXT: br label [[FOR_INC:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[NOT_CMP4:%.*]] = xor i1 [[CMP4]], true
; CHECK-NEXT: [[SUB:%.*]] = sext i1 [[NOT_CMP4]] to i32
; CHECK-NEXT: [[SUB10_SINK:%.*]] = add i32 [[J_027]], [[SUB]]
; CHECK-NEXT: [[ARRAYIDX11:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK]]
; CHECK-NEXT: [[I3:%.*]] = load i32, ptr [[ARRAYIDX11]], align 4
; CHECK-NEXT: [[SUB13:%.*]] = sub i32 [[TEMP_026]], [[I3]]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[TEMP_1:%.*]] = phi i32 [ [[ADD]], [[IF_THEN]] ], [ [[SUB13]], [[IF_ELSE]] ]
; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i32 [[J_027]], 1
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC]]
; CHECK-NEXT: [[I1_1:%.*]] = load i32, ptr [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[CMP1_1:%.*]] = icmp ugt i32 [[I1_1]], 65535
; CHECK-NEXT: [[ARRAYIDX2_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC]]
; CHECK-NEXT: [[I2_1:%.*]] = load i32, ptr [[ARRAYIDX2_1]], align 4
; CHECK-NEXT: [[CMP4_1:%.*]] = icmp ugt i32 [[I2_1]], [[I2]]
; CHECK-NEXT: br i1 [[CMP1_1]], label [[IF_THEN_1:%.*]], label [[IF_ELSE_1:%.*]]
; CHECK: if.else.1:
; CHECK-NEXT: [[NOT_CMP4_1:%.*]] = xor i1 [[CMP4_1]], true
; CHECK-NEXT: [[SUB_1:%.*]] = sext i1 [[NOT_CMP4_1]] to i32
; CHECK-NEXT: [[SUB10_SINK_1:%.*]] = add i32 [[INC]], [[SUB_1]]
; CHECK-NEXT: [[ARRAYIDX11_1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_1]]
; CHECK-NEXT: [[I3_1:%.*]] = load i32, ptr [[ARRAYIDX11_1]], align 4
; CHECK-NEXT: [[SUB13_1:%.*]] = sub i32 [[TEMP_1]], [[I3_1]]
; CHECK-NEXT: br label [[FOR_INC_1:%.*]]
; CHECK: if.then.1:
; CHECK-NEXT: [[COND_1:%.*]] = zext i1 [[CMP4_1]] to i32
; CHECK-NEXT: [[ADD_1:%.*]] = add i32 [[TEMP_1]], [[COND_1]]
; CHECK-NEXT: br label [[FOR_INC_1]]
; CHECK: for.inc.1:
; CHECK-NEXT: [[TEMP_1_1:%.*]] = phi i32 [ [[ADD_1]], [[IF_THEN_1]] ], [ [[SUB13_1]], [[IF_ELSE_1]] ]
; CHECK-NEXT: [[INC_1:%.*]] = add nuw nsw i32 [[J_027]], 2
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_1]]
; CHECK-NEXT: [[I1_2:%.*]] = load i32, ptr [[ARRAYIDX_2]], align 4
; CHECK-NEXT: [[CMP1_2:%.*]] = icmp ugt i32 [[I1_2]], 65535
; CHECK-NEXT: [[ARRAYIDX2_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_1]]
; CHECK-NEXT: [[I2_2:%.*]] = load i32, ptr [[ARRAYIDX2_2]], align 4
; CHECK-NEXT: [[CMP4_2:%.*]] = icmp ugt i32 [[I2_2]], [[I2_1]]
; CHECK-NEXT: br i1 [[CMP1_2]], label [[IF_THEN_2:%.*]], label [[IF_ELSE_2:%.*]]
; CHECK: if.else.2:
; CHECK-NEXT: [[NOT_CMP4_2:%.*]] = xor i1 [[CMP4_2]], true
; CHECK-NEXT: [[SUB_2:%.*]] = sext i1 [[NOT_CMP4_2]] to i32
; CHECK-NEXT: [[SUB10_SINK_2:%.*]] = add i32 [[INC_1]], [[SUB_2]]
; CHECK-NEXT: [[ARRAYIDX11_2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_2]]
; CHECK-NEXT: [[I3_2:%.*]] = load i32, ptr [[ARRAYIDX11_2]], align 4
; CHECK-NEXT: [[SUB13_2:%.*]] = sub i32 [[TEMP_1_1]], [[I3_2]]
; CHECK-NEXT: br label [[FOR_INC_2:%.*]]
; CHECK: if.then.2:
; CHECK-NEXT: [[COND_2:%.*]] = zext i1 [[CMP4_2]] to i32
; CHECK-NEXT: [[ADD_2:%.*]] = add i32 [[TEMP_1_1]], [[COND_2]]
; CHECK-NEXT: br label [[FOR_INC_2]]
; CHECK: for.inc.2:
; CHECK-NEXT: [[TEMP_1_2:%.*]] = phi i32 [ [[ADD_2]], [[IF_THEN_2]] ], [ [[SUB13_2]], [[IF_ELSE_2]] ]
; CHECK-NEXT: [[INC_2:%.*]] = add nuw i32 [[J_027]], 3
; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i32, ptr [[CONDITION]], i32 [[INC_2]]
; CHECK-NEXT: [[I1_3:%.*]] = load i32, ptr [[ARRAYIDX_3]], align 4
; CHECK-NEXT: [[CMP1_3:%.*]] = icmp ugt i32 [[I1_3]], 65535
; CHECK-NEXT: [[ARRAYIDX2_3:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[INC_2]]
; CHECK-NEXT: [[I2_3]] = load i32, ptr [[ARRAYIDX2_3]], align 4
; CHECK-NEXT: [[CMP4_3:%.*]] = icmp ugt i32 [[I2_3]], [[I2_2]]
; CHECK-NEXT: br i1 [[CMP1_3]], label [[IF_THEN_3:%.*]], label [[IF_ELSE_3:%.*]]
; CHECK: if.else.3:
; CHECK-NEXT: [[NOT_CMP4_3:%.*]] = xor i1 [[CMP4_3]], true
; CHECK-NEXT: [[SUB_3:%.*]] = sext i1 [[NOT_CMP4_3]] to i32
; CHECK-NEXT: [[SUB10_SINK_3:%.*]] = add i32 [[INC_2]], [[SUB_3]]
; CHECK-NEXT: [[ARRAYIDX11_3:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB10_SINK_3]]
; CHECK-NEXT: [[I3_3:%.*]] = load i32, ptr [[ARRAYIDX11_3]], align 4
; CHECK-NEXT: [[SUB13_3:%.*]] = sub i32 [[TEMP_1_2]], [[I3_3]]
; CHECK-NEXT: br label [[FOR_INC_3]]
; CHECK: if.then.3:
; CHECK-NEXT: [[COND_3:%.*]] = zext i1 [[CMP4_3]] to i32
; CHECK-NEXT: [[ADD_3:%.*]] = add i32 [[TEMP_1_2]], [[COND_3]]
; CHECK-NEXT: br label [[FOR_INC_3]]
; CHECK: for.inc.3:
; CHECK-NEXT: [[TEMP_1_3]] = phi i32 [ [[ADD_3]], [[IF_THEN_3]] ], [ [[SUB13_3]], [[IF_ELSE_3]] ]
; CHECK-NEXT: [[INC_3]] = add nuw i32 [[J_027]], 4
; CHECK-NEXT: [[NITER_NEXT_3]] = add i32 [[NITER]], 4
; CHECK-NEXT: [[NITER_NCMP_3:%.*]] = icmp eq i32 [[NITER_NEXT_3]], [[UNROLL_ITER]]
; CHECK-NEXT: br i1 [[NITER_NCMP_3]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]], label [[FOR_BODY]]
;
entry:
%cmp25 = icmp ugt i32 %MaxJ, 1
br i1 %cmp25, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
%.pre = load i32, ptr %Input, align 4
br label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.1, %for.inc ]
store i32 %temp.0.lcssa, ptr %Output, align 4
ret void
for.body: ; preds = %for.inc, %for.body.lr.ph
%i = phi i32 [ %.pre, %for.body.lr.ph ], [ %i2, %for.inc ]
%j.027 = phi i32 [ 1, %for.body.lr.ph ], [ %inc, %for.inc ]
%temp.026 = phi i32 [ 0, %for.body.lr.ph ], [ %temp.1, %for.inc ]
%arrayidx = getelementptr inbounds i32, ptr %Condition, i32 %j.027
%i1 = load i32, ptr %arrayidx, align 4
%cmp1 = icmp ugt i32 %i1, 65535
%arrayidx2 = getelementptr inbounds i32, ptr %Input, i32 %j.027
%i2 = load i32, ptr %arrayidx2, align 4
%cmp4 = icmp ugt i32 %i2, %i
br i1 %cmp1, label %if.then, label %if.else
if.then: ; preds = %for.body
%cond = zext i1 %cmp4 to i32
%add = add i32 %temp.026, %cond
br label %for.inc
if.else: ; preds = %for.body
%not.cmp4 = xor i1 %cmp4, true
%sub = sext i1 %not.cmp4 to i32
%sub10.sink = add i32 %j.027, %sub
%arrayidx11 = getelementptr inbounds i32, ptr %Input, i32 %sub10.sink
%i3 = load i32, ptr %arrayidx11, align 4
%sub13 = sub i32 %temp.026, %i3
br label %for.inc
for.inc: ; preds = %if.else, %if.then
%temp.1 = phi i32 [ %add, %if.then ], [ %sub13, %if.else ]
%inc = add nuw i32 %j.027, 1
%exitcond = icmp eq i32 %inc, %MaxJ
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
define void @test_five_blocks(ptr nocapture %Output, ptr nocapture readonly %Condition, ptr nocapture readonly %Input, i32 %MaxJ) {
; CHECK-LABEL: @test_five_blocks(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP24:%.*]] = icmp ugt i32 [[MAXJ:%.*]], 1
; CHECK-NEXT: br i1 [[CMP24]], label [[FOR_BODY_PREHEADER:%.*]], label [[CLEANUP:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[J_026:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 1, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[TEMP_025:%.*]] = phi i32 [ [[TEMP_1:%.*]], [[FOR_INC]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[INPUT:%.*]], i32 [[J_026]]
; CHECK-NEXT: [[I:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[I]], [[TEMP_025]]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[ADD]], 16777215
; CHECK-NEXT: br i1 [[CMP1]], label [[CLEANUP_LOOPEXIT:%.*]], label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[CONDITION:%.*]], i32 [[J_026]]
; CHECK-NEXT: [[I1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[CMP3:%.*]] = icmp ugt i32 [[I1]], 65535
; CHECK-NEXT: br i1 [[CMP3]], label [[IF_THEN4:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then4:
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[J_026]], -1
; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i32 [[SUB]]
; CHECK-NEXT: [[I2:%.*]] = load i32, ptr [[ARRAYIDX6]], align 4
; CHECK-NEXT: [[CMP7:%.*]] = icmp ugt i32 [[I]], [[I2]]
; CHECK-NEXT: [[COND:%.*]] = zext i1 [[CMP7]] to i32
; CHECK-NEXT: [[ADD8:%.*]] = add i32 [[ADD]], [[COND]]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: [[AND:%.*]] = and i32 [[ADD]], [[I]]
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[TEMP_1]] = phi i32 [ [[ADD8]], [[IF_THEN4]] ], [ [[AND]], [[IF_ELSE]] ]
; CHECK-NEXT: [[INC]] = add nuw i32 [[J_026]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[INC]], [[MAXJ]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP_LOOPEXIT]]
; CHECK: cleanup.loopexit:
; CHECK-NEXT: [[TEMP_2_PH:%.*]] = phi i32 [ [[TEMP_1]], [[FOR_INC]] ], [ [[ADD]], [[FOR_BODY]] ]
; CHECK-NEXT: br label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[TEMP_2:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TEMP_2_PH]], [[CLEANUP_LOOPEXIT]] ]
; CHECK-NEXT: store i32 [[TEMP_2]], ptr [[OUTPUT:%.*]], align 4
; CHECK-NEXT: ret void
;
entry:
%cmp24 = icmp ugt i32 %MaxJ, 1
br i1 %cmp24, label %for.body.preheader, label %cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.inc, %for.body.preheader
%j.026 = phi i32 [ %inc, %for.inc ], [ 1, %for.body.preheader ]
%temp.025 = phi i32 [ %temp.1, %for.inc ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %Input, i32 %j.026
%i = load i32, ptr %arrayidx, align 4
%add = add i32 %i, %temp.025
%cmp1 = icmp ugt i32 %add, 16777215
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, ptr %Condition, i32 %j.026
%i1 = load i32, ptr %arrayidx2, align 4
%cmp3 = icmp ugt i32 %i1, 65535
br i1 %cmp3, label %if.then4, label %if.else
if.then4: ; preds = %if.end
%sub = add i32 %j.026, -1
%arrayidx6 = getelementptr inbounds i32, ptr %Input, i32 %sub
%i2 = load i32, ptr %arrayidx6, align 4
%cmp7 = icmp ugt i32 %i, %i2
%cond = zext i1 %cmp7 to i32
%add8 = add i32 %add, %cond
br label %for.inc
if.else: ; preds = %if.end
%and = and i32 %add, %i
br label %for.inc
for.inc: ; preds = %if.else, %if.then4
%temp.1 = phi i32 [ %add8, %if.then4 ], [ %and, %if.else ]
%inc = add nuw i32 %j.026, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %for.inc, %for.body, %entry
%temp.2 = phi i32 [ 0, %entry ], [ %add, %for.body ], [ %temp.1, %for.inc ]
store i32 %temp.2, ptr %Output, align 4
ret void
}
%struct.Node = type { ptr, i32 }
define void @iterate_inc(ptr %n, i32 %limit) {
; CHECK-LABEL: @iterate_inc(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq ptr [[N:%.*]], null
; CHECK-NEXT: br i1 [[TOBOOL5]], label [[WHILE_END:%.*]], label [[LAND_RHS_PREHEADER:%.*]]
; CHECK: land.rhs.preheader:
; CHECK-NEXT: br label [[LAND_RHS:%.*]]
; CHECK: land.rhs:
; CHECK-NEXT: [[LIST_ADDR_06:%.*]] = phi ptr [ [[N]], [[LAND_RHS_PREHEADER]] ], [ [[I2_3:%.*]], [[WHILE_BODY_3:%.*]] ]
; CHECK-NEXT: [[VAL:%.*]] = getelementptr inbounds [[STRUCT_NODE:%.*]], ptr [[LIST_ADDR_06]], i32 0, i32 1
; CHECK-NEXT: [[I:%.*]] = load i32, ptr [[VAL]], align 4
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[LIMIT:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END_LOOPEXIT:%.*]]
; CHECK: while.body:
; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[I]], 1
; CHECK-NEXT: store i32 [[INC]], ptr [[VAL]], align 4
; CHECK-NEXT: [[I2:%.*]] = load ptr, ptr [[LIST_ADDR_06]], align 4
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq ptr [[I2]], null
; CHECK-NEXT: br i1 [[TOBOOL]], label [[WHILE_END_LOOPEXIT]], label [[LAND_RHS_1:%.*]]
; CHECK: land.rhs.1:
; CHECK-NEXT: [[VAL_1:%.*]] = getelementptr inbounds [[STRUCT_NODE]], ptr [[I2]], i32 0, i32 1
; CHECK-NEXT: [[I_1:%.*]] = load i32, ptr [[VAL_1]], align 4
; CHECK-NEXT: [[CMP_1:%.*]] = icmp slt i32 [[I_1]], [[LIMIT]]
; CHECK-NEXT: br i1 [[CMP_1]], label [[WHILE_BODY_1:%.*]], label [[WHILE_END_LOOPEXIT]]
; CHECK: while.body.1:
; CHECK-NEXT: [[INC_1:%.*]] = add nsw i32 [[I_1]], 1
; CHECK-NEXT: store i32 [[INC_1]], ptr [[VAL_1]], align 4
; CHECK-NEXT: [[I2_1:%.*]] = load ptr, ptr [[I2]], align 4
; CHECK-NEXT: [[TOBOOL_1:%.*]] = icmp eq ptr [[I2_1]], null
; CHECK-NEXT: br i1 [[TOBOOL_1]], label [[WHILE_END_LOOPEXIT]], label [[LAND_RHS_2:%.*]]
; CHECK: land.rhs.2:
; CHECK-NEXT: [[VAL_2:%.*]] = getelementptr inbounds [[STRUCT_NODE]], ptr [[I2_1]], i32 0, i32 1
; CHECK-NEXT: [[I_2:%.*]] = load i32, ptr [[VAL_2]], align 4
; CHECK-NEXT: [[CMP_2:%.*]] = icmp slt i32 [[I_2]], [[LIMIT]]
; CHECK-NEXT: br i1 [[CMP_2]], label [[WHILE_BODY_2:%.*]], label [[WHILE_END_LOOPEXIT]]
; CHECK: while.body.2:
; CHECK-NEXT: [[INC_2:%.*]] = add nsw i32 [[I_2]], 1
; CHECK-NEXT: store i32 [[INC_2]], ptr [[VAL_2]], align 4
; CHECK-NEXT: [[I2_2:%.*]] = load ptr, ptr [[I2_1]], align 4
; CHECK-NEXT: [[TOBOOL_2:%.*]] = icmp eq ptr [[I2_2]], null
; CHECK-NEXT: br i1 [[TOBOOL_2]], label [[WHILE_END_LOOPEXIT]], label [[LAND_RHS_3:%.*]]
; CHECK: land.rhs.3:
; CHECK-NEXT: [[VAL_3:%.*]] = getelementptr inbounds [[STRUCT_NODE]], ptr [[I2_2]], i32 0, i32 1
; CHECK-NEXT: [[I_3:%.*]] = load i32, ptr [[VAL_3]], align 4
; CHECK-NEXT: [[CMP_3:%.*]] = icmp slt i32 [[I_3]], [[LIMIT]]
; CHECK-NEXT: br i1 [[CMP_3]], label [[WHILE_BODY_3]], label [[WHILE_END_LOOPEXIT]]
; CHECK: while.body.3:
; CHECK-NEXT: [[INC_3:%.*]] = add nsw i32 [[I_3]], 1
; CHECK-NEXT: store i32 [[INC_3]], ptr [[VAL_3]], align 4
; CHECK-NEXT: [[I2_3]] = load ptr, ptr [[I2_2]], align 4
; CHECK-NEXT: [[TOBOOL_3:%.*]] = icmp eq ptr [[I2_3]], null
; CHECK-NEXT: br i1 [[TOBOOL_3]], label [[WHILE_END_LOOPEXIT]], label [[LAND_RHS]]
; CHECK: while.end.loopexit:
; CHECK-NEXT: br label [[WHILE_END]]
; CHECK: while.end:
; CHECK-NEXT: ret void
;
entry:
%tobool5 = icmp eq ptr %n, null
br i1 %tobool5, label %while.end, label %land.rhs.preheader
land.rhs.preheader: ; preds = %entry
br label %land.rhs
land.rhs: ; preds = %while.body, %land.rhs.preheader
%list.addr.06 = phi ptr [ %i2, %while.body ], [ %n, %land.rhs.preheader ]
%val = getelementptr inbounds %struct.Node, ptr %list.addr.06, i32 0, i32 1
%i = load i32, ptr %val, align 4
%cmp = icmp slt i32 %i, %limit
br i1 %cmp, label %while.body, label %while.end
while.body: ; preds = %land.rhs
%inc = add nsw i32 %i, 1
store i32 %inc, ptr %val, align 4
%i2 = load ptr, ptr %list.addr.06, align 4
%tobool = icmp eq ptr %i2, null
br i1 %tobool, label %while.end, label %land.rhs
while.end: ; preds = %while.body, %land.rhs, %entry
ret void
}
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