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llvm-project/llvm/test/CodeGen/X86/limit-split-cost.mir

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# REQUIRES: asserts
# RUN: llc -mtriple=x86_64-- -run-pass=greedy %s -debug-only=regalloc -huge-size-for-split=0 -o /dev/null 2>&1 | FileCheck %s
# Check no global region split is needed because the live range to split is trivially rematerializable.
# CHECK-NOT: Compact region bundles
--- |
; ModuleID = '<stdin>'
source_filename = "2.cc"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@m = local_unnamed_addr global i32 0, align 4
@.str = private unnamed_addr constant [4 x i8] c"abc\00", align 1
@.str.1 = private unnamed_addr constant [4 x i8] c"def\00", align 1
@.str.2 = private unnamed_addr constant [4 x i8] c"ghi\00", align 1
; Function Attrs: uwtable
define void @_Z3fooi(i32 %value) local_unnamed_addr #0 {
entry:
br label %do.body
do.body: ; preds = %do.cond, %entry
tail call void asm sideeffect "", "~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #2, !srcloc !3
switch i32 %value, label %do.cond [
i32 0, label %sw.bb
i32 1, label %sw.bb1
i32 2, label %sw.bb2
]
sw.bb: ; preds = %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
br label %sw.bb1
sw.bb1: ; preds = %sw.bb, %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
br label %sw.bb2
sw.bb2: ; preds = %sw.bb1, %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
br label %do.cond
do.cond: ; preds = %sw.bb2, %do.body
%0 = load i32, i32* @m, align 4, !tbaa !4
%cmp = icmp eq i32 %0, 5
br i1 %cmp, label %do.end, label %do.body
do.end: ; preds = %do.cond
ret void
}
declare void @_Z3gooPKc(i8*) local_unnamed_addr #1
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }
!llvm.module.flags = !{!0, !1}
!llvm.ident = !{!2}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"PIC Level", i32 2}
!2 = !{!"clang version 7.0.0 (trunk 335057)"}
!3 = !{i32 80}
!4 = !{!5, !5, i64 0}
!5 = !{!"int", !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
...
---
name: _Z3fooi
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr32 }
- { id: 1, class: gr32 }
- { id: 2, class: gr32 }
- { id: 3, class: gr64 }
- { id: 4, class: gr64 }
- { id: 5, class: gr64 }
- { id: 6, class: gr64 }
- { id: 7, class: gr32 }
- { id: 8, class: gr32 }
liveins:
- { reg: '$edi', virtual-reg: '%0' }
frameInfo:
hasCalls: true
body: |
bb.0.entry:
liveins: $edi
%0:gr32 = COPY $edi
%5:gr64 = LEA64r $rip, 1, $noreg, @.str.2, $noreg
%6:gr64 = MOV64rm $rip, 1, $noreg, target-flags(x86-gotpcrel) @m, $noreg :: (load 8 from got)
%4:gr64 = LEA64r $rip, 1, $noreg, @.str.1, $noreg
%3:gr64 = LEA64r $rip, 1, $noreg, @.str, $noreg
bb.1.do.body:
successors: %bb.6(0x20000000), %bb.2(0x60000000)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15, 12, implicit-def dead early-clobber $eflags, !3
CMP32ri8 %0, 2, implicit-def $eflags
JCC_1 %bb.6, 4, implicit killed $eflags
JMP_1 %bb.2
bb.2.do.body:
successors: %bb.5(0x2aaaaaab), %bb.3(0x55555555)
CMP32ri8 %0, 1, implicit-def $eflags
JCC_1 %bb.5, 4, implicit killed $eflags
JMP_1 %bb.3
bb.3.do.body:
successors: %bb.4, %bb.7
TEST32rr %0, %0, implicit-def $eflags
JCC_1 %bb.7, 5, implicit killed $eflags
JMP_1 %bb.4
bb.4.sw.bb:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %3
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.5.sw.bb1:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %4
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.6.sw.bb2:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %5
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.7.do.cond:
successors: %bb.8(0x04000000), %bb.1(0x7c000000)
CMP32mi8 %6, 1, $noreg, 0, $noreg, 5, implicit-def $eflags :: (dereferenceable load 4 from @m, !tbaa !4)
JCC_1 %bb.1, 5, implicit killed $eflags
JMP_1 %bb.8
bb.8.do.end:
RET 0
...
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