| # 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" "no-frame-pointer-elim"="false" "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" "no-frame-pointer-elim"="false" "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: 4 |
| 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 |
| JE_1 %bb.6, implicit killed $eflags |
| JMP_1 %bb.2 |
| |
| bb.2.do.body: |
| successors: %bb.5(0x2aaaaaab), %bb.3(0x55555555) |
| |
| CMP32ri8 %0, 1, implicit-def $eflags |
| JE_1 %bb.5, implicit killed $eflags |
| JMP_1 %bb.3 |
| |
| bb.3.do.body: |
| successors: %bb.4, %bb.7 |
| |
| TEST32rr %0, %0, implicit-def $eflags |
| JNE_1 %bb.7, 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) |
| JNE_1 %bb.1, implicit killed $eflags |
| JMP_1 %bb.8 |
| |
| bb.8.do.end: |
| RET 0 |
| |
| ... |
