caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
6a01ac7d06df875206f746fc982f58c161249285
clang-p2996/llvm/test/Transforms/SimplifyCFG/hoist-dbgvalue.ll
Florian Hahn c4a78b6fe3 [SimplifyCFG] Always allow hoisting if all instructions match. (#97158) 
Generalize hoistCommonCodeFromSuccessors's `EqTermsOnly` to
`AllInstsEqOnly` and always allow hoisting if all instructions match.

In that case, all instructions can be hoisted and the
original branch will be replaced and selects for PHIs are added. This
allows preserving metadata in more cases, using the existing hoisting
logic, whereas previously FoldTwoEntryPHINode would drop the metadata.


https://llvm-compile-time-tracker.com/compare.php?from=716360367fbdabac2c374c19b8746f4de49a5599&to=986b2c47df516b31d998c055400e4f62aa76edc6&stat=instructions:u

PR: https://github.com/llvm/llvm-project/pull/97158
2024-12-13 21:26:27 +00:00

144 lines
6.1 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s
; RUN: opt -try-experimental-debuginfo-iterators -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s
define i32 @foo(i32 %i) nounwind ssp !dbg !0 {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: #dbg_value(i32 [[I:%.*]], [[META7:![0-9]+]], !DIExpression(), [[META8:![0-9]+]])
; CHECK-NEXT: #dbg_value(i32 0, [[META9:![0-9]+]], !DIExpression(), [[META11:![0-9]+]])
; CHECK-NEXT: [[CALL_1:%.*]] = call i32 (...) @bar(), !dbg [[DBG12:![0-9]+]]
; CHECK-NEXT: #dbg_value(i32 [[CALL_1]], [[META9]], !DIExpression(), [[META13:![0-9]+]])
; CHECK-NEXT: #dbg_value(i32 [[CALL_1]], [[META9]], !DIExpression(), [[META15:![0-9]+]])
; CHECK-NEXT: ret i32 [[CALL_1]], !dbg [[DBG17:![0-9]+]]
;
entry:
call void @llvm.dbg.value(metadata i32 %i, metadata !6, metadata !DIExpression()), !dbg !7
call void @llvm.dbg.value(metadata i32 0, metadata !9, metadata !DIExpression()), !dbg !11
%cond = icmp ne i32 %i, 0, !dbg !12
br i1 %cond, label %then, label %else, !dbg !12
then:
%call.1 = call i32 (...) @bar(), !dbg !13
call void @llvm.dbg.value(metadata i32 %call.1, metadata !9, metadata !DIExpression()), !dbg !13
br label %exit, !dbg !15
else:
%call.2 = call i32 (...) @bar(), !dbg !16
call void @llvm.dbg.value(metadata i32 %call.2, metadata !9, metadata !DIExpression()), !dbg !16
br label %exit, !dbg !18
exit:
%k.0 = phi i32 [ %call.1, %then ], [ %call.2, %else ]
ret i32 %k.0, !dbg !19
}
define i1 @hoist_with_debug2(i32 %x) !dbg !22 {
; CHECK-LABEL: @hoist_with_debug2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp ugt i32 [[X:%.*]], 2
; CHECK-NEXT: #dbg_value(i32 [[X]], [[META19:![0-9]+]], !DIExpression(), [[META21:![0-9]+]])
; CHECK-NEXT: #dbg_value(i32 [[X]], [[META19]], !DIExpression(), [[META21]])
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL_NOT]], i1 false, i1 true
; CHECK-NEXT: ret i1 [[DOT]]
;
entry:
%tobool.not = icmp ugt i32 %x, 2
br i1 %tobool.not, label %cond.end.thread, label %cond.end.thread19
cond.end.thread19: ; preds = %land.lhs.true
call void @llvm.dbg.value(metadata i32 %x, metadata !24, metadata !DIExpression()), !dbg !25
br label %exit
cond.end.thread: ; preds = %land.lhs.true
call void @llvm.dbg.value(metadata i32 %x, metadata !24, metadata !DIExpression()), !dbg !25
br label %exit
exit:
%p = phi i1 [ true, %cond.end.thread19 ], [ false, %cond.end.thread ]
ret i1 %p
}
; Test case for PR49982.
define i16 @hoist_with_debug3_pr49982(i32 %x, i1 %c.2) !dbg !26 {
; CHECK-LABEL: @hoist_with_debug3_pr49982(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[C_0:%.*]] = icmp sgt i32 [[X:%.*]], 0
; CHECK-NEXT: [[BRMERGE:%.*]] = select i1 [[C_0]], i1 true, i1 [[C_2:%.*]]
; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 [[C_0]], i16 0, i16 20
; CHECK-NEXT: br i1 [[BRMERGE]], label [[COMMON_RET:%.*]], label [[FOR_COND]]
; CHECK: common.ret:
; CHECK-NEXT: ret i16 [[DOTMUX]]
;
entry:
br label %for.cond
for.cond:
%c.0 = icmp sgt i32 %x, 0
br i1 %c.0, label %check, label %latch
check:
%c.1 = icmp ugt i32 %x, 2
br i1 %c.1, label %then, label %else
then:
call void @llvm.dbg.value(metadata i32 %x, metadata !28, metadata !DIExpression()), !dbg !29
br label %exit.2
else:
call void @llvm.dbg.value(metadata i32 %x, metadata !28, metadata !DIExpression()), !dbg !29
br label %exit.2
latch:
br i1 %c.2, label %exit.1, label %for.cond
exit.1:
ret i16 20
exit.2:
ret i16 0
}
declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
declare i32 @bar(...)
declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
!llvm.module.flags = !{!21}
!llvm.dbg.cu = !{!2}
!0 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !2, file: !20, scope: !1, type: !3)
!1 = !DIFile(filename: "b.c", directory: "/private/tmp")
!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", isOptimized: true, emissionKind: FullDebug, file: !20)
!3 = !DISubroutineType(types: !4)
!4 = !{!5}
!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!6 = !DILocalVariable(name: "i", line: 2, arg: 1, scope: !0, file: !1, type: !5)
!7 = !DILocation(line: 2, column: 13, scope: !0)
!9 = !DILocalVariable(name: "k", line: 3, scope: !10, file: !1, type: !5)
!10 = distinct !DILexicalBlock(line: 2, column: 16, file: !20, scope: !0)
!11 = !DILocation(line: 3, column: 12, scope: !10)
!12 = !DILocation(line: 4, column: 3, scope: !10)
!13 = !DILocation(line: 5, column: 5, scope: !14)
!14 = distinct !DILexicalBlock(line: 4, column: 10, file: !20, scope: !10)
!15 = !DILocation(line: 6, column: 3, scope: !14)
!16 = !DILocation(line: 7, column: 5, scope: !17)
!17 = distinct !DILexicalBlock(line: 6, column: 10, file: !20, scope: !10)
!18 = !DILocation(line: 8, column: 3, scope: !17)
!19 = !DILocation(line: 9, column: 3, scope: !10)
!20 = !DIFile(filename: "b.c", directory: "/private/tmp")
!21 = !{i32 1, !"Debug Info Version", i32 3}
!22 = distinct !DISubprogram(name: "bar", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !2, file: !20, scope: !1, type: !3)
!23 = distinct !DILexicalBlock(line: 21, column: 33, file: !20, scope: !22)
!24 = !DILocalVariable(name: "y", line: 21, scope: !23, file: !1, type: !5)
!25 = !DILocation(line: 23, column: 3, scope: !23)
!26 = distinct !DISubprogram(name: "zar", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !2, file: !20, scope: !1, type: !3)
!27 = distinct !DILexicalBlock(line: 31, column: 33, file: !20, scope: !26)
!28 = !DILocalVariable(name: "y", line: 21, scope: !27, file: !1, type: !5)
!29 = !DILocation(line: 33, column: 3, scope: !27)
Reference in New Issue View Git Blame Copy Permalink