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MIPS: Set EnableLoopTermFold (#133378)
Setting `EnableLoopTermFold` enables `loop-term-fold` pass.
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3 files changed

+63
-32
lines changed

3 files changed

+63
-32
lines changed

‎llvm/lib/Target/Mips/MipsTargetMachine.cpp‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -233,6 +233,7 @@ class MipsPassConfig : public TargetPassConfig {
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// can break this requirement, so disable it when long branch pass is
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// enabled.
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EnableTailMerge = !getMipsSubtarget().enableLongBranchPass();
236+
EnableLoopTermFold = true;
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}
237238

238239
MipsTargetMachine &getMipsTargetMachine() const {

‎llvm/test/CodeGen/Mips/brdelayslot.ll‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -134,9 +134,12 @@ declare void @foo11()
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;
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; SUCCBB-LABEL: succbbs_loop1:
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; SUCCBB: blez $5, $BB
137-
; SUCCBB-NEXT: addiu
138-
; SUCCBB: bnez ${{[0-9]+}}, $BB
139-
; SUCCBB-NEXT: addiu
137+
; SUCCBB-NEXT: sll
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; SUCCBB-NEXT: # %bb
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; SUCCBB-NEXT: addu
140+
; SUCCBB: addiu ${{[0-9]+}}, ${{[0-9]+}}, 4
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; SUCCBB-NEXT: bne ${{[0-9]+}}, ${{[0-9]+}}, $BB
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; SUCCBB-NEXT: nop
140143

141144
define i32 @succbbs_loop1(ptr nocapture %a, i32 %n) {
142145
entry:

‎llvm/test/Transforms/LoopStrengthReduce/Mips/long-array-initialize.ll‎

Lines changed: 56 additions & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
11
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
2-
; RUN: opt < %s -passes=loop-reduce -S | FileCheck %s
2+
; RUN: opt < %s -passes=loop-reduce,loop-term-fold -S | FileCheck %s --check-prefix=CHECK-OPT
3+
; RUN: llc < %s -o - | FileCheck %s --check-prefix=CHECK-LLC
34

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target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
56
target triple = "mips-unknown-linux-gnu"
@@ -8,20 +9,34 @@ target triple = "mips-unknown-linux-gnu"
89

910
; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none)
1011
define dso_local void @in128000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 {
11-
; CHECK-LABEL: define dso_local void @in128000(
12-
; CHECK-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
13-
; CHECK-NEXT: [[ENTRY:.*]]:
14-
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
15-
; CHECK: [[FOR_COND_CLEANUP:.*]]:
16-
; CHECK-NEXT: ret void
17-
; CHECK: [[FOR_BODY]]:
18-
; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
19-
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], %[[FOR_BODY]] ], [ 128000, %[[ENTRY]] ]
20-
; CHECK-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
21-
; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i32 [[LSR_IV]], -1
22-
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
23-
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LSR_IV_NEXT]], 0
24-
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
12+
; CHECK-LLC-LABEL: in128000:
13+
; CHECK-LLC: # %bb.0: # %entry
14+
; CHECK-LLC-NEXT: lui $1, %hi(x)
15+
; CHECK-LLC-NEXT: addiu $2, $1, %lo(x)
16+
; CHECK-LLC-NEXT: lui $1, 7
17+
; CHECK-LLC-NEXT: ori $1, $1, 53248
18+
; CHECK-LLC-NEXT: addu $3, $2, $1
19+
; CHECK-LLC-NEXT: $BB0_1: # %for.body
20+
; CHECK-LLC-NEXT: # =>This Inner Loop Header: Depth=1
21+
; CHECK-LLC-NEXT: sw $4, 0($2)
22+
; CHECK-LLC-NEXT: addiu $2, $2, 4
23+
; CHECK-LLC-NEXT: bne $2, $3, $BB0_1
24+
; CHECK-LLC-NEXT: nop
25+
; CHECK-LLC-NEXT: # %bb.2: # %for.cond.cleanup
26+
; CHECK-LLC-NEXT: jr $ra
27+
; CHECK-LLC-NEXT: nop
28+
; CHECK-OPT-LABEL: define dso_local void @in128000(
29+
; CHECK-OPT-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
30+
; CHECK-OPT-NEXT: [[ENTRY:.*]]:
31+
; CHECK-OPT-NEXT: br label %[[FOR_BODY:.*]]
32+
; CHECK-OPT: [[FOR_COND_CLEANUP:.*]]:
33+
; CHECK-OPT-NEXT: ret void
34+
; CHECK-OPT: [[FOR_BODY]]:
35+
; CHECK-OPT-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
36+
; CHECK-OPT-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
37+
; CHECK-OPT-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
38+
; CHECK-OPT-NEXT: [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND:%.*]] = icmp eq ptr [[SCEVGEP]], getelementptr inbounds nuw (i8, ptr @x, i32 512000)
39+
; CHECK-OPT-NEXT: br i1 [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
2540
;
2641
entry:
2742
br label %for.body
@@ -40,20 +55,32 @@ for.body: ; preds = %entry, %for.body
4055

4156
; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none)
4257
define dso_local void @in1000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 {
43-
; CHECK-LABEL: define dso_local void @in1000(
44-
; CHECK-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
45-
; CHECK-NEXT: [[ENTRY:.*]]:
46-
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
47-
; CHECK: [[FOR_COND_CLEANUP:.*]]:
48-
; CHECK-NEXT: ret void
49-
; CHECK: [[FOR_BODY]]:
50-
; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
51-
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], %[[FOR_BODY]] ], [ 1000, %[[ENTRY]] ]
52-
; CHECK-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
53-
; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i32 [[LSR_IV]], -1
54-
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
55-
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LSR_IV_NEXT]], 0
56-
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
58+
; CHECK-LLC-LABEL: in1000:
59+
; CHECK-LLC: # %bb.0: # %entry
60+
; CHECK-LLC-NEXT: lui $1, %hi(x)
61+
; CHECK-LLC-NEXT: addiu $2, $1, %lo(x)
62+
; CHECK-LLC-NEXT: addiu $3, $2, 4000
63+
; CHECK-LLC-NEXT: $BB1_1: # %for.body
64+
; CHECK-LLC-NEXT: # =>This Inner Loop Header: Depth=1
65+
; CHECK-LLC-NEXT: sw $4, 0($2)
66+
; CHECK-LLC-NEXT: addiu $2, $2, 4
67+
; CHECK-LLC-NEXT: bne $2, $3, $BB1_1
68+
; CHECK-LLC-NEXT: nop
69+
; CHECK-LLC-NEXT: # %bb.2: # %for.cond.cleanup
70+
; CHECK-LLC-NEXT: jr $ra
71+
; CHECK-LLC-NEXT: nop
72+
; CHECK-OPT-LABEL: define dso_local void @in1000(
73+
; CHECK-OPT-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
74+
; CHECK-OPT-NEXT: [[ENTRY:.*]]:
75+
; CHECK-OPT-NEXT: br label %[[FOR_BODY:.*]]
76+
; CHECK-OPT: [[FOR_COND_CLEANUP:.*]]:
77+
; CHECK-OPT-NEXT: ret void
78+
; CHECK-OPT: [[FOR_BODY]]:
79+
; CHECK-OPT-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
80+
; CHECK-OPT-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
81+
; CHECK-OPT-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
82+
; CHECK-OPT-NEXT: [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND:%.*]] = icmp eq ptr [[SCEVGEP]], getelementptr inbounds nuw (i8, ptr @x, i32 4000)
83+
; CHECK-OPT-NEXT: br i1 [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
5784
;
5885
entry:
5986
br label %for.body

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