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MIPS: Set EnableLoopTermFold (#133454)

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Setting `EnableLoopTermFold` enables `loop-term-fold` pass.
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YunQiang Su 2025-03-29 21:51:59 +08:00 committed by GitHub
parent 9451617d56
commit 1c7ab39f3d
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GPG Key ID: B5690EEEBB952194
4 changed files with 65 additions and 32 deletions
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1
llvm/lib/Target/Mips/MipsTargetMachine.cpp
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@ -233,6 +233,7 @@ public:
// can break this requirement, so disable it when long branch pass is // can break this requirement, so disable it when long branch pass is
// enabled. // enabled.
EnableTailMerge = !getMipsSubtarget().enableLongBranchPass(); EnableTailMerge = !getMipsSubtarget().enableLongBranchPass();
EnableLoopTermFold = true;
} }
MipsTargetMachine &getMipsTargetMachine() const { MipsTargetMachine &getMipsTargetMachine() const {

9
llvm/test/CodeGen/Mips/brdelayslot.ll
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@ -134,9 +134,12 @@ declare void @foo11()
; ;
; SUCCBB-LABEL: succbbs_loop1: ; SUCCBB-LABEL: succbbs_loop1:
; SUCCBB: blez $5, $BB ; SUCCBB: blez $5, $BB
; SUCCBB-NEXT: addiu ; SUCCBB-NEXT: sll
; SUCCBB: bnez ${{[0-9]+}}, $BB ; SUCCBB-NEXT: # %bb
; SUCCBB-NEXT: addiu ; SUCCBB-NEXT: addu
; SUCCBB: addiu ${{[0-9]+}}, ${{[0-9]+}}, 4
; SUCCBB-NEXT: bne ${{[0-9]+}}, ${{[0-9]+}}, $BB
; SUCCBB-NEXT: nop
define i32 @succbbs_loop1(ptr nocapture %a, i32 %n) { define i32 @succbbs_loop1(ptr nocapture %a, i32 %n) {
entry: entry:

2
llvm/test/Transforms/LoopStrengthReduce/Mips/lit.local.cfg Normal file
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@ -0,0 +1,2 @@
if not "Mips" in config.root.targets:
config.unsupported = True

85
llvm/test/Transforms/LoopStrengthReduce/Mips/long-array-initialize.ll
View File

@ -1,5 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=loop-reduce -S | FileCheck %s ; RUN: opt < %s -passes=loop-reduce,loop-term-fold -S | FileCheck %s --check-prefix=CHECK-OPT
; RUN: llc < %s -o - | FileCheck %s --check-prefix=CHECK-LLC
target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64" target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
target triple = "mips-unknown-linux-gnu" target triple = "mips-unknown-linux-gnu"
@ -8,20 +9,34 @@ target triple = "mips-unknown-linux-gnu"
; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none) ; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none)
define dso_local void @in128000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 { define dso_local void @in128000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 {
; CHECK-LABEL: define dso_local void @in128000( ; CHECK-LLC-LABEL: in128000:
; CHECK-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr { ; CHECK-LLC: # %bb.0: # %entry
; CHECK-NEXT: [[ENTRY:.*]]: ; CHECK-LLC-NEXT: lui $1, %hi(x)
; CHECK-NEXT: br label %[[FOR_BODY:.*]] ; CHECK-LLC-NEXT: addiu $2, $1, %lo(x)
; CHECK: [[FOR_COND_CLEANUP:.*]]: ; CHECK-LLC-NEXT: lui $1, 7
; CHECK-NEXT: ret void ; CHECK-LLC-NEXT: ori $1, $1, 53248
; CHECK: [[FOR_BODY]]: ; CHECK-LLC-NEXT: addu $3, $2, $1
; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ] ; CHECK-LLC-NEXT: $BB0_1: # %for.body
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], %[[FOR_BODY]] ], [ 128000, %[[ENTRY]] ] ; CHECK-LLC-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4 ; CHECK-LLC-NEXT: sw $4, 0($2)
; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i32 [[LSR_IV]], -1 ; CHECK-LLC-NEXT: addiu $2, $2, 4
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4 ; CHECK-LLC-NEXT: bne $2, $3, $BB0_1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LSR_IV_NEXT]], 0 ; CHECK-LLC-NEXT: nop
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]] ; CHECK-LLC-NEXT: # %bb.2: # %for.cond.cleanup
; CHECK-LLC-NEXT: jr $ra
; CHECK-LLC-NEXT: nop
; CHECK-OPT-LABEL: define dso_local void @in128000(
; CHECK-OPT-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
; CHECK-OPT-NEXT: [[ENTRY:.*]]:
; CHECK-OPT-NEXT: br label %[[FOR_BODY:.*]]
; CHECK-OPT: [[FOR_COND_CLEANUP:.*]]:
; CHECK-OPT-NEXT: ret void
; CHECK-OPT: [[FOR_BODY]]:
; CHECK-OPT-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
; CHECK-OPT-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
; CHECK-OPT-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
; CHECK-OPT-NEXT: [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND:%.*]] = icmp eq ptr [[SCEVGEP]], getelementptr inbounds nuw (i8, ptr @x, i32 512000)
; CHECK-OPT-NEXT: br i1 [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
; ;
entry: entry:
br label %for.body br label %for.body
@ -40,20 +55,32 @@ for.body: ; preds = %entry, %for.body
; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none) ; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none)
define dso_local void @in1000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 { define dso_local void @in1000(i32 noundef signext %k, i32 noundef signext %n) local_unnamed_addr #0 {
; CHECK-LABEL: define dso_local void @in1000( ; CHECK-LLC-LABEL: in1000:
; CHECK-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr { ; CHECK-LLC: # %bb.0: # %entry
; CHECK-NEXT: [[ENTRY:.*]]: ; CHECK-LLC-NEXT: lui $1, %hi(x)
; CHECK-NEXT: br label %[[FOR_BODY:.*]] ; CHECK-LLC-NEXT: addiu $2, $1, %lo(x)
; CHECK: [[FOR_COND_CLEANUP:.*]]: ; CHECK-LLC-NEXT: addiu $3, $2, 4000
; CHECK-NEXT: ret void ; CHECK-LLC-NEXT: $BB1_1: # %for.body
; CHECK: [[FOR_BODY]]: ; CHECK-LLC-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ] ; CHECK-LLC-NEXT: sw $4, 0($2)
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], %[[FOR_BODY]] ], [ 1000, %[[ENTRY]] ] ; CHECK-LLC-NEXT: addiu $2, $2, 4
; CHECK-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4 ; CHECK-LLC-NEXT: bne $2, $3, $BB1_1
; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i32 [[LSR_IV]], -1 ; CHECK-LLC-NEXT: nop
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4 ; CHECK-LLC-NEXT: # %bb.2: # %for.cond.cleanup
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LSR_IV_NEXT]], 0 ; CHECK-LLC-NEXT: jr $ra
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]] ; CHECK-LLC-NEXT: nop
; CHECK-OPT-LABEL: define dso_local void @in1000(
; CHECK-OPT-SAME: i32 noundef signext [[K:%.*]], i32 noundef signext [[N:%.*]]) local_unnamed_addr {
; CHECK-OPT-NEXT: [[ENTRY:.*]]:
; CHECK-OPT-NEXT: br label %[[FOR_BODY:.*]]
; CHECK-OPT: [[FOR_COND_CLEANUP:.*]]:
; CHECK-OPT-NEXT: ret void
; CHECK-OPT: [[FOR_BODY]]:
; CHECK-OPT-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP:%.*]], %[[FOR_BODY]] ], [ @x, %[[ENTRY]] ]
; CHECK-OPT-NEXT: store i32 [[K]], ptr [[LSR_IV1]], align 4
; CHECK-OPT-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV1]], i32 4
; CHECK-OPT-NEXT: [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND:%.*]] = icmp eq ptr [[SCEVGEP]], getelementptr inbounds nuw (i8, ptr @x, i32 4000)
; CHECK-OPT-NEXT: br i1 [[LSR_FOLD_TERM_COND_REPLACED_TERM_COND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
; ;
entry: entry:
br label %for.body br label %for.body