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llvm-mirror/test/Transforms/SimplifyCFG/hoist-dbgvalue.ll
Nikita Popov 92b46047e1 [SimplifyCFG] Create logical or in SimplifyCondBranchToCondBranch() 
We need to use a logical or instead of a bitwise or to preserve
poison behavior. Poison from the second condition should not
propagate if the first condition is true.

We were already handling this correctly in FoldBranchToCommonDest(),
but not in this fold. (There are still other folds with this issue.)
2021-05-04 19:51:30 +02:00

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6.7 KiB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -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: call void @llvm.dbg.value(metadata i32 [[I:%.*]], metadata [[META7:![0-9]+]], metadata !DIExpression()), !dbg [[DBG8:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG11:![0-9]+]]
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[I]], 0, !dbg [[DBG12:![0-9]+]]
; CHECK-NEXT: br i1 [[COND]], label [[THEN:%.*]], label [[ELSE:%.*]], !dbg [[DBG12]]
; CHECK: then:
; CHECK-NEXT: [[CALL_1:%.*]] = call i32 (...) @bar(), !dbg [[DBG13:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 [[CALL_1]], metadata [[META9]], metadata !DIExpression()), !dbg [[DBG13]]
; CHECK-NEXT: br label [[EXIT:%.*]], !dbg [[DBG15:![0-9]+]]
; CHECK: else:
; CHECK-NEXT: [[CALL_2:%.*]] = call i32 (...) @bar(), !dbg [[DBG16:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 [[CALL_2]], metadata [[META9]], metadata !DIExpression()), !dbg [[DBG16]]
; CHECK-NEXT: br label [[EXIT]], !dbg [[DBG18:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: [[K_0:%.*]] = phi i32 [ [[CALL_1]], [[THEN]] ], [ [[CALL_2]], [[ELSE]] ]
; CHECK-NEXT: ret i32 [[K_0]], !dbg [[DBG19:![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: call void @llvm.dbg.value(metadata i32 [[X]], metadata [[META21:![0-9]+]], metadata !DIExpression()), !dbg [[DBG23:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 [[X]], metadata [[META21]], metadata !DIExpression()), !dbg [[DBG23]]
; 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 [[EXIT_1:%.*]], label [[FOR_COND]]
; CHECK: exit.1:
; 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)
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