162 lines
7.4 KiB
Text
162 lines
7.4 KiB
Text
|
# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
|
||
|
|
# RUN: -experimental-debug-variable-locations \
|
||
|
|
# RUN: -run-pass=phi-node-elimination,register-coalescer \
|
||
|
|
# RUN: | FileCheck %s --check-prefix=DOESCOALESCE
|
||
|
|
# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
|
||
|
|
# RUN: -experimental-debug-variable-locations \
|
||
|
|
# RUN: -run-pass=phi-node-elimination,register-coalescer,livedebugvars,greedy,virtregrewriter \
|
||
|
|
# RUN: | FileCheck %s --check-prefix=CHECK
|
||
|
|
#
|
||
|
|
# Test that a PHI with a debug instruction number attached survives register
|
||
|
|
# coalescing, when its vreg gets coalesced. This test comes in two parts, first
|
||
|
|
# that coalescing actually happens, second that a DBG_PHI is still produced
|
||
|
|
# afterwards.
|
||
|
|
#
|
||
|
|
# Original C code, the PHI is of the value of 'bar' after the control flow.
|
||
|
|
# Compiled at -O0, applied -mem2reg, llc -O0, then manually added the PHI
|
||
|
|
# instruction label. Additional variable locations removed.
|
||
|
|
#
|
||
|
|
# void ext(long);
|
||
|
|
# long getlong(void);
|
||
|
|
# int foo(long bar, long baz) {
|
||
|
|
# ext(bar);
|
||
|
|
# bar += 12;
|
||
|
|
# ext(bar);
|
||
|
|
#
|
||
|
|
# if (getlong())
|
||
|
|
# bar += 1;
|
||
|
|
#
|
||
|
|
# bar += baz;
|
||
|
|
# ext(bar);
|
||
|
|
# return bar;
|
||
|
|
# }
|
||
|
|
#
|
||
|
|
--- |
|
||
|
|
; ModuleID = 'promoted.ll'
|
||
|
|
source_filename = "test.c"
|
||
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-unknown-linux-gnu"
|
||
|
|
|
||
|
|
define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
|
||
|
|
entry:
|
||
|
|
call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13
|
||
|
|
call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13
|
||
|
|
call void @ext(i64 %bar), !dbg !13
|
||
|
|
%add = add nsw i64 %bar, 12, !dbg !13
|
||
|
|
call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13
|
||
|
|
call void @ext(i64 %add), !dbg !13
|
||
|
|
%call = call i64 @getlong(), !dbg !13
|
||
|
|
%tobool = icmp ne i64 %call, 0, !dbg !13
|
||
|
|
br i1 %tobool, label %if.then, label %if.end, !dbg !13
|
||
|
|
|
||
|
|
if.then: ; preds = %entry
|
||
|
|
%add1 = add nsw i64 %add, 1, !dbg !13
|
||
|
|
call void @llvm.dbg.value(metadata i64 %add1, metadata !12, metadata !DIExpression()), !dbg !13
|
||
|
|
br label %if.end, !dbg !13
|
||
|
|
|
||
|
|
if.end: ; preds = %if.then, %entry
|
||
|
|
%bar.addr.0 = phi i64 [ %add1, %if.then ], [ %add, %entry ], !dbg !13
|
||
|
|
call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13
|
||
|
|
%add2 = add nsw i64 %bar.addr.0, %baz, !dbg !13
|
||
|
|
call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13
|
||
|
|
call void @ext(i64 %add2), !dbg !13
|
||
|
|
%conv = trunc i64 %add2 to i32, !dbg !13
|
||
|
|
ret i32 %conv, !dbg !13
|
||
|
|
}
|
||
|
|
|
||
|
|
; Function Attrs: nounwind readnone speculatable willreturn
|
||
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata)
|
||
|
|
|
||
|
|
declare dso_local void @ext(i64)
|
||
|
|
|
||
|
|
declare dso_local i64 @getlong()
|
||
|
|
|
||
|
|
; Function Attrs: nounwind readnone speculatable willreturn
|
||
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata)
|
||
|
|
|
||
|
|
!llvm.dbg.cu = !{!0}
|
||
|
|
!llvm.module.flags = !{!3, !4, !5}
|
||
|
|
!llvm.ident = !{!6}
|
||
|
|
|
||
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
|
||
|
|
!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
|
||
|
|
!2 = !{}
|
||
|
|
!3 = !{i32 7, !"Dwarf Version", i32 4}
|
||
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
||
|
|
!5 = !{i32 1, !"wchar_size", i32 4}
|
||
|
|
!6 = !{!""}
|
||
|
|
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
|
||
|
|
!8 = !DISubroutineType(types: !9)
|
||
|
|
!9 = !{!10, !11, !11}
|
||
|
|
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
||
|
|
!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
|
||
|
|
!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
|
||
|
|
!13 = !DILocation(line: 0, scope: !7)
|
||
|
|
!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
|
||
|
|
!15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
|
||
|
|
|
||
|
|
...
|
||
|
|
---
|
||
|
|
name: foo
|
||
|
|
alignment: 16
|
||
|
|
tracksRegLiveness: true
|
||
|
|
debugInstrRef: true
|
||
|
|
liveins:
|
||
|
|
- { reg: '$rdi', virtual-reg: '%3' }
|
||
|
|
- { reg: '$rsi', virtual-reg: '%5' }
|
||
|
|
frameInfo:
|
||
|
|
maxAlignment: 1
|
||
|
|
hasCalls: true
|
||
|
|
machineFunctionInfo: {}
|
||
|
|
body: |
|
||
|
|
bb.0.entry:
|
||
|
|
liveins: $rdi, $rsi
|
||
|
|
|
||
|
|
%5:gr64 = COPY $rsi
|
||
|
|
%3:gr64 = COPY $rdi
|
||
|
|
%4:gr64 = COPY killed %3
|
||
|
|
%6:gr64 = COPY killed %5
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
$rdi = COPY %4, debug-location !13
|
||
|
|
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
%9:gr64 = ADD64ri32 %4, 12, implicit-def $eflags, debug-location !13
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
$rdi = COPY %9, debug-location !13
|
||
|
|
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !13
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
%8:gr64 = COPY $rax, debug-location !13
|
||
|
|
CMP64ri8 %8, 0, implicit-def $eflags, debug-location !13
|
||
|
|
JCC_1 %bb.2, 4, implicit $eflags, debug-location !13
|
||
|
|
|
||
|
|
; DOESCOALESCE-LABEL: bb.1.if.then:
|
||
|
|
; CHECK-LABEL: bb.1.if.then:
|
||
|
|
bb.1.if.then:
|
||
|
|
%10:gr64 = ADD64ri32 %9, 1, implicit-def $eflags, debug-location !13
|
||
|
|
|
||
|
|
; Verify that the vreg is different immediately after register coalescing.
|
||
|
|
; DOESCOALESCE-NOT: %10:gr64 ADD64ri32
|
||
|
|
; DOESCOALESCE: %{{[0-9]+}}:gr64_with_sub_8bit = ADD64ri32
|
||
|
|
; Verify that all these registers land in r14.
|
||
|
|
; CHECK: renamable $r14 = ADD64ri32 killed renamable $r14
|
||
|
|
|
||
|
|
; DOESCOALESCE-LABEL: bb.2.if.end:
|
||
|
|
; CHECK-LABEL: bb.2.if.end:
|
||
|
|
bb.2.if.end:
|
||
|
|
%2:gr64 = PHI %9, %bb.0, %10, %bb.1, debug-instr-number 1, debug-location !13
|
||
|
|
; CHECK: DBG_PHI $r14, 1
|
||
|
|
DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !13
|
||
|
|
%2:gr64 = ADD64rr killed %2, %6, implicit-def $eflags, debug-location !13
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
$rdi = COPY %2, debug-location !13
|
||
|
|
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
|
||
|
|
%13:gr32 = COPY %2.sub_32bit, debug-location !13
|
||
|
|
$eax = COPY %13, debug-location !13
|
||
|
|
RET64 implicit $eax, debug-location !13
|
||
|
|
|
||
|
|
...
|