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llvm-project/llvm/test/CodeGen/X86/ragreedy-bug.ll
Guozhi Wei cbdccb30c2 [RA] Split a virtual register in cold blocks if it is not assigned preferred physical register 
If a virtual register is not assigned preferred physical register, it means some
COPY instructions will be changed to real register move instructions. In this
case we can try to split the virtual register in colder blocks, if success, the
original COPY instructions can be deleted, and the new COPY instructions in
colder blocks will be generated as register move instructions. It results in
fewer dynamic register move instructions executed.

The new test case split-reg-with-hint.ll gives an example, the hot path contains
24 instructions without this patch, now it is only 4 instructions with this
patch.

Differential Revision: https://reviews.llvm.org/D156491
2023-09-15 19:52:50 +00:00

309 lines
13 KiB
LLVM
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; RUN: llc < %s -mtriple=x86_64-apple-macosx -regalloc=greedy | FileCheck %s
; This testing case is reduced from 197.parser prune_match function.
; We make sure register copies are not generated on isupper.exit blocks.
; isupper.exit and isupper.exit223 get tail-duplicated into all their
; predecessors.
; CHECK: cond.true.i.i
; CHECK-NEXT: in Loop
; Mem-move
; CHECK-NEXT: movl
; CHECK-NEXT: andl
; CHECK-NEXT: testl
; CHECK-NEXT: jne
; CHECK: cond.true.i.i217
; CHECK-NEXT: in Loop
; Mem-move
; CHECK-NEXT: movl
; CHECK-NEXT: andl
; CHECK-NEXT: testl
; CHECK-NEXT: je
; CHECK: cond.false.i.i
; CHECK: maskrune
; CHECK-NEXT: movzbl
; CHECK-NEXT: movq
; CHECK-NEXT: testl
; CHECK-NEXT: je
; CHECK: cond.false.i.i219
; CHECK: maskrune
; CHECK-NEXT: movzbl
; CHECK-NEXT: movq
; CHECK-NEXT: testl
; CHECK-NEXT: jne
%struct.List_o_links_struct = type { i32, i32, i32, ptr }
%struct.Connector_struct = type { i16, i16, i8, i8, ptr, ptr }
%struct._RuneLocale = type { [8 x i8], [32 x i8], ptr, ptr, i32, [256 x i32], [256 x i32], [256 x i32], %struct._RuneRange, %struct._RuneRange, %struct._RuneRange, ptr, i32, i32, ptr }
%struct._RuneRange = type { i32, ptr }
%struct._RuneEntry = type { i32, i32, i32, ptr }
%struct._RuneCharClass = type { [14 x i8], i32 }
%struct.Exp_struct = type { i8, i8, i8, i8, %union.anon }
%union.anon = type { ptr }
%struct.E_list_struct = type { ptr, ptr }
%struct.domain_struct = type { ptr, i32, ptr, i32, i32, ptr, ptr }
%struct.d_tree_leaf_struct = type { ptr, i32, ptr }
@_DefaultRuneLocale = external global %struct._RuneLocale
declare i32 @__maskrune(i32, i64) #7
define fastcc i32 @prune_match(ptr nocapture readonly %a, ptr nocapture readonly %b) #9 {
entry:
%0 = load i16, ptr %a, align 2
%1 = load i16, ptr %b, align 2
%cmp = icmp eq i16 %0, %1
br i1 %cmp, label %if.end, label %return, !prof !988
if.end:
%priority = getelementptr inbounds %struct.Connector_struct, ptr %a, i64 0, i32 2
%2 = load i8, ptr %priority, align 1
%priority5 = getelementptr inbounds %struct.Connector_struct, ptr %b, i64 0, i32 2
%3 = load i8, ptr %priority5, align 1
%string = getelementptr inbounds %struct.Connector_struct, ptr %a, i64 0, i32 5
%4 = load ptr, ptr %string, align 8
%string7 = getelementptr inbounds %struct.Connector_struct, ptr %b, i64 0, i32 5
%5 = load ptr, ptr %string7, align 8
br label %while.cond
while.cond:
%lsr.iv27 = phi i64 [ %lsr.iv.next28, %if.end17 ], [ 0, %if.end ]
%scevgep55 = getelementptr i8, ptr %4, i64 %lsr.iv27
%6 = load i8, ptr %scevgep55, align 1
%idxprom.i.i = sext i8 %6 to i64
%isascii.i.i224 = icmp sgt i8 %6, -1
br i1 %isascii.i.i224, label %cond.true.i.i, label %cond.false.i.i, !prof !181
cond.true.i.i:
%arrayidx.i.i = getelementptr inbounds %struct._RuneLocale, ptr @_DefaultRuneLocale, i64 0, i32 5, i64 %idxprom.i.i
%7 = load i32, ptr %arrayidx.i.i, align 4
%and.i.i = and i32 %7, 32768
br label %isupper.exit
cond.false.i.i:
%8 = trunc i64 %idxprom.i.i to i8
%conv8 = sext i8 %8 to i32
%call3.i.i = tail call i32 @__maskrune(i32 %conv8, i64 32768) #3
br label %isupper.exit
isupper.exit:
%tobool1.sink.i.in.i = phi i32 [ %and.i.i, %cond.true.i.i ], [ %call3.i.i, %cond.false.i.i ]
%tobool1.sink.i.i = icmp eq i32 %tobool1.sink.i.in.i, 0
br i1 %tobool1.sink.i.i, label %lor.rhs, label %while.body, !prof !989
lor.rhs:
%sunkaddr = ptrtoint ptr %5 to i64
%sunkaddr58 = add i64 %sunkaddr, %lsr.iv27
%sunkaddr59 = inttoptr i64 %sunkaddr58 to ptr
%9 = load i8, ptr %sunkaddr59, align 1
%idxprom.i.i214 = sext i8 %9 to i64
%isascii.i.i213225 = icmp sgt i8 %9, -1
br i1 %isascii.i.i213225, label %cond.true.i.i217, label %cond.false.i.i219, !prof !181
cond.true.i.i217:
%arrayidx.i.i215 = getelementptr inbounds %struct._RuneLocale, ptr @_DefaultRuneLocale, i64 0, i32 5, i64 %idxprom.i.i214
%10 = load i32, ptr %arrayidx.i.i215, align 4
%and.i.i216 = and i32 %10, 32768
br label %isupper.exit223
cond.false.i.i219:
%11 = trunc i64 %idxprom.i.i214 to i8
%conv9 = sext i8 %11 to i32
%call3.i.i218 = tail call i32 @__maskrune(i32 %conv9, i64 32768) #3
br label %isupper.exit223
isupper.exit223:
%tobool1.sink.i.in.i220 = phi i32 [ %and.i.i216, %cond.true.i.i217 ], [ %call3.i.i218, %cond.false.i.i219 ]
%tobool1.sink.i.i221 = icmp eq i32 %tobool1.sink.i.in.i220, 0
br i1 %tobool1.sink.i.i221, label %while.end, label %while.body, !prof !990
while.body:
%sunkaddr60 = ptrtoint ptr %4 to i64
%sunkaddr61 = add i64 %sunkaddr60, %lsr.iv27
%sunkaddr62 = inttoptr i64 %sunkaddr61 to ptr
%12 = load i8, ptr %sunkaddr62, align 1
%sunkaddr63 = ptrtoint ptr %5 to i64
%sunkaddr64 = add i64 %sunkaddr63, %lsr.iv27
%sunkaddr65 = inttoptr i64 %sunkaddr64 to ptr
%13 = load i8, ptr %sunkaddr65, align 1
%cmp14 = icmp eq i8 %12, %13
br i1 %cmp14, label %if.end17, label %return, !prof !991
if.end17:
%lsr.iv.next28 = add i64 %lsr.iv27, 1
br label %while.cond
while.end:
%14 = or i8 %3, %2
%15 = icmp eq i8 %14, 0
br i1 %15, label %if.then23, label %if.else88, !prof !992
if.then23:
%sunkaddr66 = ptrtoint ptr %a to i64
%sunkaddr67 = add i64 %sunkaddr66, 16
%sunkaddr68 = inttoptr i64 %sunkaddr67 to ptr
%16 = load ptr, ptr %sunkaddr68, align 8
%17 = load i8, ptr %16, align 1
%cmp26 = icmp eq i8 %17, 83
%sunkaddr69 = ptrtoint ptr %4 to i64
%sunkaddr70 = add i64 %sunkaddr69, %lsr.iv27
%sunkaddr71 = inttoptr i64 %sunkaddr70 to ptr
%18 = load i8, ptr %sunkaddr71, align 1
br i1 %cmp26, label %land.lhs.true28, label %while.cond59.preheader, !prof !993
land.lhs.true28:
switch i8 %18, label %land.rhs.preheader [
i8 112, label %land.lhs.true35
i8 0, label %return
], !prof !994
land.lhs.true35:
%sunkaddr72 = ptrtoint ptr %5 to i64
%sunkaddr73 = add i64 %sunkaddr72, %lsr.iv27
%sunkaddr74 = inttoptr i64 %sunkaddr73 to ptr
%19 = load i8, ptr %sunkaddr74, align 1
switch i8 %19, label %land.rhs.preheader [
i8 112, label %land.lhs.true43
], !prof !995
land.lhs.true43:
%20 = ptrtoint ptr %16 to i64
%21 = sub i64 0, %20
%scevgep52 = getelementptr i8, ptr %4, i64 %21
%scevgep53 = getelementptr i8, ptr %scevgep52, i64 %lsr.iv27
%scevgep54 = getelementptr i8, ptr %scevgep53, i64 -1
%cmp45 = icmp eq ptr %scevgep54, null
br i1 %cmp45, label %return, label %lor.lhs.false47, !prof !996
lor.lhs.false47:
%22 = ptrtoint ptr %16 to i64
%23 = sub i64 0, %22
%scevgep47 = getelementptr i8, ptr %4, i64 %23
%scevgep48 = getelementptr i8, ptr %scevgep47, i64 %lsr.iv27
%scevgep49 = getelementptr i8, ptr %scevgep48, i64 -2
%cmp50 = icmp eq ptr %scevgep49, null
br i1 %cmp50, label %land.lhs.true52, label %while.cond59.preheader, !prof !997
land.lhs.true52:
%sunkaddr75 = ptrtoint ptr %4 to i64
%sunkaddr76 = add i64 %sunkaddr75, %lsr.iv27
%sunkaddr77 = add i64 %sunkaddr76, -1
%sunkaddr78 = inttoptr i64 %sunkaddr77 to ptr
%24 = load i8, ptr %sunkaddr78, align 1
%cmp55 = icmp eq i8 %24, 73
%cmp61233 = icmp eq i8 %18, 0
%or.cond265 = or i1 %cmp55, %cmp61233
br i1 %or.cond265, label %return, label %land.rhs.preheader, !prof !998
while.cond59.preheader:
%cmp61233.old = icmp eq i8 %18, 0
br i1 %cmp61233.old, label %return, label %land.rhs.preheader, !prof !999
land.rhs.preheader:
%scevgep33 = getelementptr i8, ptr %5, i64 %lsr.iv27
%scevgep43 = getelementptr i8, ptr %4, i64 %lsr.iv27
br label %land.rhs
land.rhs:
%lsr.iv = phi i64 [ 0, %land.rhs.preheader ], [ %lsr.iv.next, %if.then83 ]
%25 = phi i8 [ %27, %if.then83 ], [ %18, %land.rhs.preheader ]
%scevgep34 = getelementptr i8, ptr %scevgep33, i64 %lsr.iv
%26 = load i8, ptr %scevgep34, align 1
%cmp64 = icmp eq i8 %26, 0
br i1 %cmp64, label %return, label %while.body66, !prof !1000
while.body66:
%cmp68 = icmp eq i8 %25, 42
%cmp72 = icmp eq i8 %26, 42
%or.cond = or i1 %cmp68, %cmp72
br i1 %or.cond, label %if.then83, label %lor.lhs.false74, !prof !1001
lor.lhs.false74:
%cmp77 = icmp ne i8 %25, %26
%cmp81 = icmp eq i8 %25, 94
%or.cond208 = or i1 %cmp77, %cmp81
br i1 %or.cond208, label %return, label %if.then83, !prof !1002
if.then83:
%scevgep44 = getelementptr i8, ptr %scevgep43, i64 %lsr.iv
%scevgep45 = getelementptr i8, ptr %scevgep44, i64 1
%27 = load i8, ptr %scevgep45, align 1
%cmp61 = icmp eq i8 %27, 0
%lsr.iv.next = add i64 %lsr.iv, 1
br i1 %cmp61, label %return, label %land.rhs, !prof !999
if.else88:
%cmp89 = icmp eq i8 %2, 1
%cmp92 = icmp eq i8 %3, 2
%or.cond159 = and i1 %cmp89, %cmp92
br i1 %or.cond159, label %while.cond95.preheader, label %if.else123, !prof !1003
while.cond95.preheader:
%sunkaddr79 = ptrtoint ptr %4 to i64
%sunkaddr80 = add i64 %sunkaddr79, %lsr.iv27
%sunkaddr81 = inttoptr i64 %sunkaddr80 to ptr
%28 = load i8, ptr %sunkaddr81, align 1
%cmp97238 = icmp eq i8 %28, 0
br i1 %cmp97238, label %return, label %land.rhs99.preheader, !prof !1004
land.rhs99.preheader:
%scevgep31 = getelementptr i8, ptr %5, i64 %lsr.iv27
%scevgep40 = getelementptr i8, ptr %4, i64 %lsr.iv27
br label %land.rhs99
land.rhs99:
%lsr.iv17 = phi i64 [ 0, %land.rhs99.preheader ], [ %lsr.iv.next18, %if.then117 ]
%29 = phi i8 [ %31, %if.then117 ], [ %28, %land.rhs99.preheader ]
%scevgep32 = getelementptr i8, ptr %scevgep31, i64 %lsr.iv17
%30 = load i8, ptr %scevgep32, align 1
%cmp101 = icmp eq i8 %30, 0
br i1 %cmp101, label %return, label %while.body104, !prof !1005
while.body104:
%cmp107 = icmp eq i8 %29, %30
%cmp111 = icmp eq i8 %29, 42
%or.cond209 = or i1 %cmp107, %cmp111
%cmp115 = icmp eq i8 %30, 94
%or.cond210 = or i1 %or.cond209, %cmp115
br i1 %or.cond210, label %if.then117, label %return, !prof !1006
if.then117:
%scevgep41 = getelementptr i8, ptr %scevgep40, i64 %lsr.iv17
%scevgep42 = getelementptr i8, ptr %scevgep41, i64 1
%31 = load i8, ptr %scevgep42, align 1
%cmp97 = icmp eq i8 %31, 0
%lsr.iv.next18 = add i64 %lsr.iv17, 1
br i1 %cmp97, label %return, label %land.rhs99, !prof !1004
if.else123:
%cmp124 = icmp eq i8 %3, 1
%cmp127 = icmp eq i8 %2, 2
%or.cond160 = and i1 %cmp124, %cmp127
br i1 %or.cond160, label %while.cond130.preheader, label %return, !prof !1007
while.cond130.preheader:
%sunkaddr82 = ptrtoint ptr %4 to i64
%sunkaddr83 = add i64 %sunkaddr82, %lsr.iv27
%sunkaddr84 = inttoptr i64 %sunkaddr83 to ptr
%32 = load i8, ptr %sunkaddr84, align 1
%cmp132244 = icmp eq i8 %32, 0
br i1 %cmp132244, label %return, label %land.rhs134.preheader, !prof !1008
land.rhs134.preheader:
%scevgep29 = getelementptr i8, ptr %5, i64 %lsr.iv27
%scevgep37 = getelementptr i8, ptr %4, i64 %lsr.iv27
br label %land.rhs134
land.rhs134:
%lsr.iv22 = phi i64 [ 0, %land.rhs134.preheader ], [ %lsr.iv.next23, %if.then152 ]
%33 = phi i8 [ %35, %if.then152 ], [ %32, %land.rhs134.preheader ]
%scevgep30 = getelementptr i8, ptr %scevgep29, i64 %lsr.iv22
%34 = load i8, ptr %scevgep30, align 1
%cmp136 = icmp eq i8 %34, 0
br i1 %cmp136, label %return, label %while.body139, !prof !1009
while.body139:
%cmp142 = icmp eq i8 %33, %34
%cmp146 = icmp eq i8 %34, 42
%or.cond211 = or i1 %cmp142, %cmp146
%cmp150 = icmp eq i8 %33, 94
%or.cond212 = or i1 %or.cond211, %cmp150
br i1 %or.cond212, label %if.then152, label %return, !prof !1010
if.then152:
%scevgep38 = getelementptr i8, ptr %scevgep37, i64 %lsr.iv22
%scevgep39 = getelementptr i8, ptr %scevgep38, i64 1
%35 = load i8, ptr %scevgep39, align 1
%cmp132 = icmp eq i8 %35, 0
%lsr.iv.next23 = add i64 %lsr.iv22, 1
br i1 %cmp132, label %return, label %land.rhs134, !prof !1008
return:
%retval.0 = phi i32 [ 0, %entry ], [ 1, %land.lhs.true52 ], [ 1, %land.lhs.true43 ], [ 0, %if.else123 ], [ 1, %while.cond59.preheader ], [ 1, %while.cond95.preheader ], [ 1, %while.cond130.preheader ], [ 1, %land.lhs.true28 ], [ 1, %if.then83 ], [ 0, %lor.lhs.false74 ], [ 1, %land.rhs ], [ 1, %if.then117 ], [ 0, %while.body104 ], [ 1, %land.rhs99 ], [ 1, %if.then152 ], [ 0, %while.body139 ], [ 1, %land.rhs134 ], [ 0, %while.body ]
ret i32 %retval.0
}
!181 = !{!"branch_weights", i32 662038, i32 1}
!988 = !{!"branch_weights", i32 12091450, i32 1916}
!989 = !{!"branch_weights", i32 7564670, i32 4526781}
!990 = !{!"branch_weights", i32 7484958, i32 13283499}
!991 = !{!"branch_weights", i32 8677007, i32 4606493}
!992 = !{!"branch_weights", i32 -1172426948, i32 145094705}
!993 = !{!"branch_weights", i32 1468914, i32 5683688}
!994 = !{!"branch_weights", i32 114025221, i32 -1217548794, i32 -1199521551}
!995 = !{!"branch_weights", i32 1853716452, i32 -444717951}
!996 = !{!"branch_weights", i32 1004870, i32 20259}
!997 = !{!"branch_weights", i32 20071, i32 189}
!998 = !{!"branch_weights", i32 -1020255939, i32 572177766}
!999 = !{!"branch_weights", i32 2666513, i32 3466431}
!1000 = !{!"branch_weights", i32 5117635, i32 1859780}
!1001 = !{!"branch_weights", i32 354902465, i32 -1444604407}
!1002 = !{!"branch_weights", i32 -1762419279, i32 1592770684}
!1003 = !{!"branch_weights", i32 1435905930, i32 -1951930624}
!1004 = !{!"branch_weights", i32 1, i32 504888}
!1005 = !{!"branch_weights", i32 94662, i32 504888}
!1006 = !{!"branch_weights", i32 -1897793104, i32 160196332}
!1007 = !{!"branch_weights", i32 2074643678, i32 -29579071}
!1008 = !{!"branch_weights", i32 1, i32 226163}
!1009 = !{!"branch_weights", i32 58357, i32 226163}
!1010 = !{!"branch_weights", i32 -2072848646, i32 92907517}
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