822f74a911
This patch contains a number of changes relating to the above flag;
primarily it updates comment references to the old flag names,
"-fextend-lifetimes" and "-fextend-this-ptr" to refer to the new names,
"-fextend-variable-liveness[={all,this}]". These changes are all NFC.
This patch also removes the explicit -fextend-this-ptr-liveness flag
alias, and shortens the help-text for the main flag; these are both
changes that were meant to be applied in the initial PR (#110000), but
due to some user-error on my part they were not included in the merged
commit.
97 lines
4.1 KiB
LLVM
97 lines
4.1 KiB
LLVM
; REQUIRES: object-emission
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; Make sure the fake use of 'b' at the end of 'foo' causes location information for 'b'
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; to extend all the way to the end of the function.
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; RUN: %llc_dwarf -O2 -filetype=obj -mtriple=x86_64-unknown-linux -dwarf-linkage-names=Abstract < %s | llvm-dwarfdump --debug-info --debug-line -v - -o %t
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; RUN: %python %p/../Inputs/check-fake-use.py %t
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; RUN: sed -e 's,call void (...) @llvm.fake.use,;,' %s | %llc_dwarf - -O2 -filetype=obj -mtriple=x86_64-unknown-linux -dwarf-linkage-names=Abstract | llvm-dwarfdump --debug-info --debug-line -v - -o %t
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; RUN: not %python %p/../Inputs/check-fake-use.py %t
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; Generated with:
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; clang -O2 -g -S -emit-llvm -fextend-variable-liveness=this fake-use.c
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;
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; int glob[10];
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; extern void bar();
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;
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; int foo(int b, int i)
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; {
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; int loc = glob[i] * 2;
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; if (b) {
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; glob[2] = loc;
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; bar();
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; }
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; return loc;
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; }
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;
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; ModuleID = 't2.c'
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source_filename = "t2.c"
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@glob = common local_unnamed_addr global [10 x i32] zeroinitializer, align 16, !dbg !0
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; Function Attrs: nounwind sspstrong uwtable
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define i32 @foo(i32 %b, i32 %i) local_unnamed_addr optdebug !dbg !13 {
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entry:
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#dbg_value(i32 %b, !17, !20, !21)
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%c = add i32 %b, 42
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%tobool = icmp sgt i32 %c, 2, !dbg !27
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tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
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tail call void (...) @bar() #2, !dbg !32
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%idxprom = sext i32 %i to i64, !dbg !22
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%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @glob, i64 0, i64 %idxprom, !dbg !22
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%0 = load i32, i32* %arrayidx, align 4, !dbg !22, !tbaa !23
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%mul = shl nsw i32 %0, 1, !dbg !22
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br i1 %tobool, label %if.end, label %if.then, !dbg !29
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if.then: ; preds = %entry
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store i32 %mul, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @glob, i64 0, i64 2), align 8, !dbg !30, !tbaa !23
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tail call void (...) @bar() #2, !dbg !32
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br label %if.end, !dbg !33
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if.end: ; preds = %entry, %if.then
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call void (...) @llvm.fake.use(i32 %b), !dbg !34
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ret i32 %mul, !dbg !35
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}
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declare void @bar(...) local_unnamed_addr
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!9, !10, !11}
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!llvm.ident = !{!12}
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!0 = distinct !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "glob", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true), expr: !DIExpression())
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang version 4.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4)
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!2 = !DIFile(filename: "t2.c", directory: "/")
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!3 = !{}
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!4 = !{!0}
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!5 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 320, align: 32, elements: !7)
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!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!7 = !{!8}
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!8 = !DISubrange(count: 10)
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!9 = !{i32 2, !"Dwarf Version", i32 4}
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = !{i32 1, !"PIC Level", i32 2}
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!12 = !{!"clang version 4.0.0"}
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!13 = distinct !DISubprogram(name: "foo", scope: !2, file: !2, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !1, retainedNodes: !16)
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!14 = !DISubroutineType(types: !15)
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!15 = !{!6, !6, !6}
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!16 = !{!17, !19}
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!17 = !DILocalVariable(name: "b", arg: 1, scope: !13, file: !2, line: 4, type: !6)
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!19 = !DILocalVariable(name: "loc", scope: !13, file: !2, line: 6, type: !6)
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!20 = !DIExpression()
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!21 = !DILocation(line: 4, scope: !13)
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!22 = !DILocation(line: 6, scope: !13)
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!23 = !{!24, !24, i64 0}
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!24 = !{!"int", !25, i64 0}
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!25 = !{!"omnipotent char", !26, i64 0}
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!26 = !{!"Simple C/C++ TBAA"}
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!27 = !DILocation(line: 7, scope: !28)
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!28 = distinct !DILexicalBlock(scope: !13, file: !2, line: 7)
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!29 = !DILocation(line: 7, scope: !13)
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!30 = !DILocation(line: 8, scope: !31)
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!31 = distinct !DILexicalBlock(scope: !28, file: !2, line: 7)
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!32 = !DILocation(line: 9, scope: !31)
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!33 = !DILocation(line: 10, scope: !31)
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!34 = !DILocation(line: 12, scope: !13)
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!35 = !DILocation(line: 11, scope: !13)
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