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Jul 4, 2025
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[NFC][LoopFuse] Regenerate LoopFusion tests using UTC #146902

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85 changes: 71 additions & 14 deletions llvm/test/Transforms/LoopFusion/four_loops.ll
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Original file line number Diff line number Diff line change
@@ -1,25 +1,82 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion < %s | FileCheck %s

@A = common global [1024 x i32] zeroinitializer, align 16
@B = common global [1024 x i32] zeroinitializer, align 16
@C = common global [1024 x i32] zeroinitializer, align 16
@D = common global [1024 x i32] zeroinitializer, align 16

; CHECK: void @dep_free
; CHECK-NEXT: bb:
; CHECK-NEXT: br label %[[LOOP1HEADER:bb[0-9]+]]
; CHECK: [[LOOP1HEADER]]
; CHECK: br label %[[LOOP2BODY:bb[0-9]+]]
; CHECK: [[LOOP2BODY]]
; CHECK: br label %[[LOOP3BODY:bb[0-9]+]]
; CHECK: [[LOOP3BODY]]
; CHECK: br label %[[LOOP4BODY:bb[0-9]+]]
; CHECK: [[LOOP4BODY]]
; CHECK: br label %[[LOOP1LATCH:bb[0-9]+]]
; CHECK: [[LOOP1LATCH]]
; CHECK: br i1 %{{.*}}, label %[[LOOP1HEADER]], label %[[LOOPEXIT:bb[0-9]+]]
; CHECK: ret void
define void @dep_free() {
; CHECK-LABEL: define void @dep_free() {
; CHECK-NEXT: [[BB:.*]]:
; CHECK-NEXT: br label %[[BB15:.*]]
; CHECK: [[BB15]]:
; CHECK-NEXT: [[DOT08:%.*]] = phi i32 [ 0, %[[BB]] ], [ [[TMP23:%.*]], %[[BB61:.*]] ]
; CHECK-NEXT: [[INDVARS_IV107:%.*]] = phi i64 [ 0, %[[BB]] ], [ [[INDVARS_IV_NEXT11:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[DOT016:%.*]] = phi i32 [ 0, %[[BB]] ], [ [[TMP36:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[INDVARS_IV75:%.*]] = phi i64 [ 0, %[[BB]] ], [ [[INDVARS_IV_NEXT8:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[DOT024:%.*]] = phi i32 [ 0, %[[BB]] ], [ [[TMP49:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[INDVARS_IV43:%.*]] = phi i64 [ 0, %[[BB]] ], [ [[INDVARS_IV_NEXT5:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[DOT032:%.*]] = phi i32 [ 0, %[[BB]] ], [ [[TMP62:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[INDVARS_IV1:%.*]] = phi i64 [ 0, %[[BB]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[BB61]] ]
; CHECK-NEXT: [[TMP:%.*]] = add nsw i32 [[DOT08]], -3
; CHECK-NEXT: [[TMP16:%.*]] = add nuw nsw i64 [[INDVARS_IV107]], 3
; CHECK-NEXT: [[TMP17:%.*]] = trunc i64 [[TMP16]] to i32
; CHECK-NEXT: [[TMP18:%.*]] = mul nsw i32 [[TMP]], [[TMP17]]
; CHECK-NEXT: [[TMP19:%.*]] = trunc i64 [[INDVARS_IV107]] to i32
; CHECK-NEXT: [[TMP20:%.*]] = srem i32 [[TMP18]], [[TMP19]]
; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds [1024 x i32], ptr @A, i64 0, i64 [[INDVARS_IV107]]
; CHECK-NEXT: store i32 [[TMP20]], ptr [[TMP21]], align 4
; CHECK-NEXT: br label %[[BB22:.*]]
; CHECK: [[BB22]]:
; CHECK-NEXT: [[TMP28:%.*]] = add nsw i32 [[DOT016]], -3
; CHECK-NEXT: [[TMP29:%.*]] = add nuw nsw i64 [[INDVARS_IV75]], 3
; CHECK-NEXT: [[TMP30:%.*]] = trunc i64 [[TMP29]] to i32
; CHECK-NEXT: [[TMP31:%.*]] = mul nsw i32 [[TMP28]], [[TMP30]]
; CHECK-NEXT: [[TMP32:%.*]] = trunc i64 [[INDVARS_IV75]] to i32
; CHECK-NEXT: [[TMP33:%.*]] = srem i32 [[TMP31]], [[TMP32]]
; CHECK-NEXT: [[TMP34:%.*]] = getelementptr inbounds [1024 x i32], ptr @B, i64 0, i64 [[INDVARS_IV75]]
; CHECK-NEXT: store i32 [[TMP33]], ptr [[TMP34]], align 4
; CHECK-NEXT: br label %[[BB35:.*]]
; CHECK: [[BB35]]:
; CHECK-NEXT: [[TMP41:%.*]] = add nsw i32 [[DOT024]], -3
; CHECK-NEXT: [[TMP42:%.*]] = add nuw nsw i64 [[INDVARS_IV43]], 3
; CHECK-NEXT: [[TMP43:%.*]] = trunc i64 [[TMP42]] to i32
; CHECK-NEXT: [[TMP44:%.*]] = mul nsw i32 [[TMP41]], [[TMP43]]
; CHECK-NEXT: [[TMP45:%.*]] = trunc i64 [[INDVARS_IV43]] to i32
; CHECK-NEXT: [[TMP46:%.*]] = srem i32 [[TMP44]], [[TMP45]]
; CHECK-NEXT: [[TMP47:%.*]] = getelementptr inbounds [1024 x i32], ptr @C, i64 0, i64 [[INDVARS_IV43]]
; CHECK-NEXT: store i32 [[TMP46]], ptr [[TMP47]], align 4
; CHECK-NEXT: br label %[[BB48:.*]]
; CHECK: [[BB48]]:
; CHECK-NEXT: [[TMP54:%.*]] = add nsw i32 [[DOT032]], -3
; CHECK-NEXT: [[TMP55:%.*]] = add nuw nsw i64 [[INDVARS_IV1]], 3
; CHECK-NEXT: [[TMP56:%.*]] = trunc i64 [[TMP55]] to i32
; CHECK-NEXT: [[TMP57:%.*]] = mul nsw i32 [[TMP54]], [[TMP56]]
; CHECK-NEXT: [[TMP58:%.*]] = trunc i64 [[INDVARS_IV1]] to i32
; CHECK-NEXT: [[TMP59:%.*]] = srem i32 [[TMP57]], [[TMP58]]
; CHECK-NEXT: [[TMP60:%.*]] = getelementptr inbounds [1024 x i32], ptr @D, i64 0, i64 [[INDVARS_IV1]]
; CHECK-NEXT: store i32 [[TMP59]], ptr [[TMP60]], align 4
; CHECK-NEXT: br label %[[BB61]]
; CHECK: [[BB52:.*]]:
; CHECK-NEXT: br label %[[BB63:.*]]
; CHECK: [[BB61]]:
; CHECK-NEXT: [[INDVARS_IV_NEXT11]] = add nuw nsw i64 [[INDVARS_IV107]], 1
; CHECK-NEXT: [[TMP23]] = add nuw nsw i32 [[DOT08]], 1
; CHECK-NEXT: [[EXITCOND12:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT11]], 100
; CHECK-NEXT: [[INDVARS_IV_NEXT8]] = add nuw nsw i64 [[INDVARS_IV75]], 1
; CHECK-NEXT: [[TMP36]] = add nuw nsw i32 [[DOT016]], 1
; CHECK-NEXT: [[EXITCOND9:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT8]], 100
; CHECK-NEXT: [[INDVARS_IV_NEXT5]] = add nuw nsw i64 [[INDVARS_IV43]], 1
; CHECK-NEXT: [[TMP49]] = add nuw nsw i32 [[DOT024]], 1
; CHECK-NEXT: [[EXITCOND6:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT5]], 100
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV1]], 1
; CHECK-NEXT: [[TMP62]] = add nuw nsw i32 [[DOT032]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 100
; CHECK-NEXT: br i1 [[EXITCOND]], label %[[BB15]], label %[[BB52]]
; CHECK: [[BB63]]:
; CHECK-NEXT: ret void
;
bb:
br label %bb15

Expand Down
93 changes: 68 additions & 25 deletions llvm/test/Transforms/LoopFusion/guarded_peel.ll
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion -loop-fusion-peel-max-count=3 < %s | FileCheck %s

; Tests if we are able to fuse two guarded loops which have constant but
Expand All @@ -6,33 +7,75 @@

@B = common global [1024 x i32] zeroinitializer, align 16

; CHECK-LABEL: void @main(ptr noalias %A)
; CHECK-NEXT: entry:
; CHECK: br i1 %cmp4, label %for.first.entry, label %for.end
; CHECK: for.first.entry
; CHECK-NEXT: br label %for.first.peel.begin
; CHECK: for.first.peel.begin:
; CHECK-NEXT: br label %for.first.peel
; CHECK: for.first.peel:
; CHECK: br label %for.first.peel.next
; CHECK: for.first.peel.next:
; CHECK-NEXT: br label %for.first.peel2
; CHECK: for.first.peel2:
; CHECK: br label %for.first.peel.next1
; CHECK: for.first.peel.next1:
; CHECK-NEXT: br label %for.first.peel.next11
; CHECK: for.first.peel.next11:
; CHECK-NEXT: br label %for.first.entry.peel.newph
; CHECK: for.first.entry.peel.newph:
; CHECK: br label %for.first
; CHECK: for.first:
; CHECK: br i1 %cmp3, label %for.first, label %for.second.exit
; CHECK: for.second.exit:
; CHECK: br label %for.end
; CHECK: for.end:
; CHECK-NEXT: ret void

define void @main(ptr noalias %A) {
; CHECK-LABEL: define void @main(
; CHECK-SAME: ptr noalias [[A:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i64 0, 45
; CHECK-NEXT: [[CMP31:%.*]] = icmp slt i64 2, 45
; CHECK-NEXT: br i1 [[CMP4]], label %[[FOR_FIRST_ENTRY:.*]], label %[[FOR_END:.*]]
; CHECK: [[FOR_FIRST_ENTRY]]:
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL_BEGIN:.*]]
; CHECK: [[FOR_FIRST_PEEL_BEGIN]]:
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL:.*]]
; CHECK: [[FOR_FIRST_PEEL]]:
; CHECK-NEXT: [[SUB_PEEL:%.*]] = sub nsw i64 0, 3
; CHECK-NEXT: [[ADD_PEEL:%.*]] = add nsw i64 0, 3
; CHECK-NEXT: [[MUL_PEEL:%.*]] = mul nsw i64 [[SUB_PEEL]], [[ADD_PEEL]]
; CHECK-NEXT: [[REM_PEEL:%.*]] = srem i64 [[MUL_PEEL]], 0
; CHECK-NEXT: [[CONV_PEEL:%.*]] = trunc i64 [[REM_PEEL]] to i32
; CHECK-NEXT: [[ARRAYIDX_PEEL:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 0
; CHECK-NEXT: store i32 [[CONV_PEEL]], ptr [[ARRAYIDX_PEEL]], align 4
; CHECK-NEXT: [[INC_PEEL:%.*]] = add nsw i64 0, 1
; CHECK-NEXT: [[CMP_PEEL:%.*]] = icmp slt i64 [[INC_PEEL]], 45
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL_NEXT:.*]]
; CHECK: [[FOR_FIRST_PEEL_NEXT]]:
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL2:.*]]
; CHECK: [[FOR_FIRST_PEEL2]]:
; CHECK-NEXT: [[SUB_PEEL3:%.*]] = sub nsw i64 [[INC_PEEL]], 3
; CHECK-NEXT: [[ADD_PEEL4:%.*]] = add nsw i64 [[INC_PEEL]], 3
; CHECK-NEXT: [[MUL_PEEL5:%.*]] = mul nsw i64 [[SUB_PEEL3]], [[ADD_PEEL4]]
; CHECK-NEXT: [[REM_PEEL6:%.*]] = srem i64 [[MUL_PEEL5]], [[INC_PEEL]]
; CHECK-NEXT: [[CONV_PEEL7:%.*]] = trunc i64 [[REM_PEEL6]] to i32
; CHECK-NEXT: [[ARRAYIDX_PEEL8:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INC_PEEL]]
; CHECK-NEXT: store i32 [[CONV_PEEL7]], ptr [[ARRAYIDX_PEEL8]], align 4
; CHECK-NEXT: [[INC_PEEL9:%.*]] = add nsw i64 [[INC_PEEL]], 1
; CHECK-NEXT: [[CMP_PEEL10:%.*]] = icmp slt i64 [[INC_PEEL9]], 45
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL_NEXT1:.*]]
; CHECK: [[FOR_FIRST_PEEL_NEXT1]]:
; CHECK-NEXT: br label %[[FOR_FIRST_PEEL_NEXT11:.*]]
; CHECK: [[FOR_FIRST_PEEL_NEXT11]]:
; CHECK-NEXT: br label %[[FOR_FIRST_ENTRY_PEEL_NEWPH:.*]]
; CHECK: [[FOR_FIRST_ENTRY_PEEL_NEWPH]]:
; CHECK-NEXT: br label %[[FOR_FIRST:.*]]
; CHECK: [[FOR_FIRST]]:
; CHECK-NEXT: [[I_05:%.*]] = phi i64 [ [[INC:%.*]], %[[FOR_FIRST]] ], [ [[INC_PEEL9]], %[[FOR_FIRST_ENTRY_PEEL_NEWPH]] ]
; CHECK-NEXT: [[I1_02:%.*]] = phi i64 [ [[INC14:%.*]], %[[FOR_FIRST]] ], [ 2, %[[FOR_FIRST_ENTRY_PEEL_NEWPH]] ]
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i64 [[I_05]], 3
; CHECK-NEXT: [[ADD:%.*]] = add nsw i64 [[I_05]], 3
; CHECK-NEXT: [[MUL:%.*]] = mul nsw i64 [[SUB]], [[ADD]]
; CHECK-NEXT: [[REM:%.*]] = srem i64 [[MUL]], [[I_05]]
; CHECK-NEXT: [[CONV:%.*]] = trunc i64 [[REM]] to i32
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[I_05]]
; CHECK-NEXT: store i32 [[CONV]], ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add nsw i64 [[I_05]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[INC]], 45
; CHECK-NEXT: [[SUB7:%.*]] = sub nsw i64 [[I1_02]], 3
; CHECK-NEXT: [[ADD8:%.*]] = add nsw i64 [[I1_02]], 3
; CHECK-NEXT: [[MUL9:%.*]] = mul nsw i64 [[SUB7]], [[ADD8]]
; CHECK-NEXT: [[REM10:%.*]] = srem i64 [[MUL9]], [[I1_02]]
; CHECK-NEXT: [[CONV11:%.*]] = trunc i64 [[REM10]] to i32
; CHECK-NEXT: [[ARRAYIDX12:%.*]] = getelementptr inbounds [1024 x i32], ptr @B, i64 0, i64 [[I1_02]]
; CHECK-NEXT: store i32 [[CONV11]], ptr [[ARRAYIDX12]], align 4
; CHECK-NEXT: [[INC14]] = add nsw i64 [[I1_02]], 1
; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i64 [[INC14]], 45
; CHECK-NEXT: br i1 [[CMP3]], label %[[FOR_FIRST]], label %[[FOR_SECOND_EXIT:.*]]
; CHECK: [[FOR_SECOND_EXIT]]:
; CHECK-NEXT: br label %[[FOR_END]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: ret void
;
entry:
%cmp4 = icmp slt i64 0, 45
br i1 %cmp4, label %for.first.entry, label %for.second.guard
Expand Down
55 changes: 35 additions & 20 deletions llvm/test/Transforms/LoopFusion/guarded_unsafeblock_peel.ll
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion -loop-fusion-peel-max-count=3 < %s | FileCheck %s

; Tests that we do not fuse two guarded loops together.
Expand All @@ -6,28 +7,42 @@
; loops unsafe to fuse together.
; The expected output of this test is the function as below.

; CHECK-LABEL: void @unsafe_exitblock(ptr noalias %A, ptr noalias %B)
; CHECK: for.first.guard
; CHECK: br i1 %cmp3, label %for.first.preheader, label %for.second.guard
; CHECK: for.first.preheader:
; CHECK-NEXT: br label %for.first
; CHECK: for.first:
; CHECK: br i1 %cmp, label %for.first, label %for.first.exit
; CHECK: for.first.exit:
; CHECK-NEXT: call void @bar()
; CHECK-NEXT: br label %for.second.guard
; CHECK: for.second.guard:
; CHECK: br i1 %cmp21, label %for.second.preheader, label %for.end
; CHECK: for.second.preheader:
; CHECK-NEXT: br label %for.second
; CHECK: for.second:
; CHECK: br i1 %cmp2, label %for.second, label %for.second.exit
; CHECK: for.second.exit:
; CHECK-NEXT: br label %for.end
; CHECK: for.end:
; CHECK-NEXT: ret void

define void @unsafe_exitblock(ptr noalias %A, ptr noalias %B) {
; CHECK-LABEL: define void @unsafe_exitblock(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]]) {
; CHECK-NEXT: [[FOR_FIRST_GUARD:.*:]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i64 0, 45
; CHECK-NEXT: br i1 [[CMP3]], label %[[FOR_FIRST_PREHEADER:.*]], label %[[FOR_SECOND_GUARD:.*]]
; CHECK: [[FOR_FIRST_PREHEADER]]:
; CHECK-NEXT: br label %[[FOR_FIRST:.*]]
; CHECK: [[FOR_FIRST]]:
; CHECK-NEXT: [[I_04:%.*]] = phi i64 [ [[INC:%.*]], %[[FOR_FIRST]] ], [ 0, %[[FOR_FIRST_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[I_04]]
; CHECK-NEXT: store i32 0, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add nsw i64 [[I_04]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[INC]], 45
; CHECK-NEXT: br i1 [[CMP]], label %[[FOR_FIRST]], label %[[FOR_FIRST_EXIT:.*]]
; CHECK: [[FOR_FIRST_EXIT]]:
; CHECK-NEXT: call void @bar()
; CHECK-NEXT: br label %[[FOR_SECOND_GUARD]]
; CHECK: [[FOR_SECOND_GUARD]]:
; CHECK-NEXT: [[CMP21:%.*]] = icmp slt i64 2, 45
; CHECK-NEXT: br i1 [[CMP21]], label %[[FOR_SECOND_PREHEADER:.*]], label %[[FOR_END:.*]]
; CHECK: [[FOR_SECOND_PREHEADER]]:
; CHECK-NEXT: br label %[[FOR_SECOND:.*]]
; CHECK: [[FOR_SECOND]]:
; CHECK-NEXT: [[J_02:%.*]] = phi i64 [ [[INC6:%.*]], %[[FOR_SECOND]] ], [ 2, %[[FOR_SECOND_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[J_02]]
; CHECK-NEXT: store i32 0, ptr [[ARRAYIDX4]], align 4
; CHECK-NEXT: [[INC6]] = add nsw i64 [[J_02]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i64 [[INC6]], 45
; CHECK-NEXT: br i1 [[CMP2]], label %[[FOR_SECOND]], label %[[FOR_SECOND_EXIT:.*]]
; CHECK: [[FOR_SECOND_EXIT]]:
; CHECK-NEXT: br label %[[FOR_END]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: ret void
;
for.first.guard:
%cmp3 = icmp slt i64 0, 45
br i1 %cmp3, label %for.first.preheader, label %for.second.guard
Expand Down
25 changes: 18 additions & 7 deletions llvm/test/Transforms/LoopFusion/hoist_preheader.ll
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Original file line number Diff line number Diff line change
@@ -1,16 +1,27 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion < %s | FileCheck %s

define void @hoist_preheader(i32 %N) {

; CHECK:pre1:
; CHECK-NEXT: %hoistme = add i32 1, %N
; CHECK-NEXT: %hoistme2 = add i32 1, %hoistme
; CHECK-NEXT: br label %body1
; CHECK-LABEL: define void @hoist_preheader(
; CHECK-SAME: i32 [[N:%.*]]) {
; CHECK-NEXT: [[PRE1:.*]]:
; CHECK-NEXT: [[HOISTME:%.*]] = add i32 1, [[N]]
; CHECK-NEXT: [[HOISTME2:%.*]] = add i32 1, [[HOISTME]]
; CHECK-NEXT: br label %[[BODY1:.*]]
; CHECK: [[BODY1]]:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], %[[BODY1]] ], [ 0, %[[PRE1]] ]
; CHECK-NEXT: [[I2:%.*]] = phi i32 [ [[I_NEXT2:%.*]], %[[BODY1]] ], [ 0, %[[PRE1]] ]
; CHECK-NEXT: [[I_NEXT]] = add i32 1, [[I]]
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[I]], [[N]]
; CHECK-NEXT: [[I_NEXT2]] = add i32 1, [[I2]]
; CHECK-NEXT: [[COND2:%.*]] = icmp ne i32 [[I2]], [[N]]
; CHECK-NEXT: br i1 [[COND2]], label %[[BODY1]], label %[[EXIT:.*]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret void
;
pre1:
br label %body1

; CHECK: body1:
; CHECK-NOT: %hoistme
body1: ; preds = %pre1, %body1
%i = phi i32 [%i_next, %body1], [0, %pre1]
%i_next = add i32 1, %i
Expand Down
72 changes: 56 additions & 16 deletions llvm/test/Transforms/LoopFusion/inner_loops.ll
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Original file line number Diff line number Diff line change
@@ -1,26 +1,66 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion < %s 2>&1 | FileCheck %s

@A = common global [1024 x [1024 x i32]] zeroinitializer, align 16
@B = common global [1024 x [1024 x i32]] zeroinitializer, align 16

; CHECK: void @dep_free
; CHECK-NEXT: bb:
; CHECK-NEXT: br label %[[LOOP1HEADER:bb[0-9]*]]
; CHECK: [[LOOP1HEADER]]
; CHECK: br i1 %{{.*}}, label %[[LOOP1BODY:bb[0-9]*]], label %[[LOOP2PREHEADER:bb[0-9]+]]
; CHECK: [[LOOP1BODY]]
; CHECK: br label %[[LOOP1LATCH:bb[0-9]*]]
; CHECK: [[LOOP1LATCH]]
; CHECK: br label %[[LOOP2PREHEADER:bb[0-9]+]]
; CHECK: [[LOOP2PREHEADER]]
; CHECK: br i1 %{{.*}}, label %[[LOOP2BODY:bb[0-9]*]], label %[[LOOP2EXIT:bb[0-9]*]]
; CHECK: [[LOOP2BODY]]
; CHECK: br label %[[LOOP2LATCH:bb[0-9]+]]
; CHECK: [[LOOP2LATCH]]
; CHECK: br label %[[LOOP1HEADER]]
; CHECK: ret void

define void @dep_free() {
; CHECK-LABEL: define void @dep_free() {
; CHECK-NEXT: [[BB:.*]]:
; CHECK-NEXT: br label %[[BB9:.*]]
; CHECK: [[BB9]]:
; CHECK-NEXT: [[INDVARS_IV6:%.*]] = phi i64 [ [[INDVARS_IV_NEXT7:%.*]], %[[BB35:.*]] ], [ 0, %[[BB]] ]
; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ 0, %[[BB]] ], [ [[TMP36:%.*]], %[[BB35]] ]
; CHECK-NEXT: [[EXITCOND8:%.*]] = icmp ne i64 [[INDVARS_IV6]], 100
; CHECK-NEXT: br i1 [[EXITCOND8]], label %[[BB11:.*]], label %[[BB10:.*]]
; CHECK: [[BB10]]:
; CHECK-NEXT: br label %[[BB37:.*]]
; CHECK: [[BB11]]:
; CHECK-NEXT: br label %[[BB12:.*]]
; CHECK: [[BB12]]:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], %[[BB21:.*]] ], [ 0, %[[BB11]] ]
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV]], 100
; CHECK-NEXT: br i1 [[EXITCOND]], label %[[BB14:.*]], label %[[BB23_PREHEADER:.*]]
; CHECK: [[BB23_PREHEADER]]:
; CHECK-NEXT: br label %[[BB23:.*]]
; CHECK: [[BB14]]:
; CHECK-NEXT: [[TMP:%.*]] = add nsw i32 [[DOT0]], -3
; CHECK-NEXT: [[TMP15:%.*]] = add nuw nsw i64 [[INDVARS_IV6]], 3
; CHECK-NEXT: [[TMP16:%.*]] = trunc i64 [[TMP15]] to i32
; CHECK-NEXT: [[TMP17:%.*]] = mul nsw i32 [[TMP]], [[TMP16]]
; CHECK-NEXT: [[TMP18:%.*]] = trunc i64 [[INDVARS_IV6]] to i32
; CHECK-NEXT: [[TMP19:%.*]] = srem i32 [[TMP17]], [[TMP18]]
; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds [1024 x [1024 x i32]], ptr @A, i64 0, i64 [[INDVARS_IV6]], i64 [[INDVARS_IV]]
; CHECK-NEXT: store i32 [[TMP19]], ptr [[TMP20]], align 4
; CHECK-NEXT: br label %[[BB21]]
; CHECK: [[BB21]]:
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: br label %[[BB12]]
; CHECK: [[BB23]]:
; CHECK-NEXT: [[INDVARS_IV3:%.*]] = phi i64 [ [[INDVARS_IV_NEXT4:%.*]], %[[BB33:.*]] ], [ 0, %[[BB23_PREHEADER]] ]
; CHECK-NEXT: [[EXITCOND5:%.*]] = icmp ne i64 [[INDVARS_IV3]], 100
; CHECK-NEXT: br i1 [[EXITCOND5]], label %[[BB25:.*]], label %[[BB35]]
; CHECK: [[BB25]]:
; CHECK-NEXT: [[TMP26:%.*]] = add nsw i32 [[DOT0]], -3
; CHECK-NEXT: [[TMP27:%.*]] = add nuw nsw i64 [[INDVARS_IV6]], 3
; CHECK-NEXT: [[TMP28:%.*]] = trunc i64 [[TMP27]] to i32
; CHECK-NEXT: [[TMP29:%.*]] = mul nsw i32 [[TMP26]], [[TMP28]]
; CHECK-NEXT: [[TMP30:%.*]] = trunc i64 [[INDVARS_IV6]] to i32
; CHECK-NEXT: [[TMP31:%.*]] = srem i32 [[TMP29]], [[TMP30]]
; CHECK-NEXT: [[TMP32:%.*]] = getelementptr inbounds [1024 x [1024 x i32]], ptr @B, i64 0, i64 [[INDVARS_IV6]], i64 [[INDVARS_IV3]]
; CHECK-NEXT: store i32 [[TMP31]], ptr [[TMP32]], align 4
; CHECK-NEXT: br label %[[BB33]]
; CHECK: [[BB33]]:
; CHECK-NEXT: [[INDVARS_IV_NEXT4]] = add nuw nsw i64 [[INDVARS_IV3]], 1
; CHECK-NEXT: br label %[[BB23]]
; CHECK: [[BB35]]:
; CHECK-NEXT: [[INDVARS_IV_NEXT7]] = add nuw nsw i64 [[INDVARS_IV6]], 1
; CHECK-NEXT: [[TMP36]] = add nuw nsw i32 [[DOT0]], 1
; CHECK-NEXT: br label %[[BB9]]
; CHECK: [[BB37]]:
; CHECK-NEXT: ret void
;
bb:
br label %bb9

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