46 lines
2.0 KiB
LLVM
46 lines
2.0 KiB
LLVM
; RUN: opt %s -sroa -early-cse -S | FileCheck %s
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; CHECK: DIExpression(DW_OP_constu, 9223372036854775808, DW_OP_minus, DW_OP_stack_value)
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; Created from the following C input (and then delta-reduced the IR):
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;
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; extern unsigned long long use(unsigned long long);
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; void f(unsigned long long x) {
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; for (; x > 0; x --) {
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; unsigned long long y = x + 0x8000000000000000;
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; use(x);
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; }
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; }
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define void @f(i64 noundef %x) #0 !dbg !9 {
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entry:
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%x.addr = alloca i64, align 8
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%y = alloca i64, align 8
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i64, i64* %x.addr, align 8
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%1 = bitcast i64* %y to i8*
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call void @llvm.dbg.declare(metadata i64* %y, metadata !15, metadata !DIExpression())
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, !dbg !29
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%2 = load i64, i64* %x.addr, align 8
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%add = add i64 %2, -9223372036854775808
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store i64 %add, i64* %y, align 8
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br label %for.cond
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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!llvm.module.flags = !{!3,!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None, sysroot: "/")
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!1 = !DIFile(filename: "t.c", directory: "/")
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!7 = !{i32 7, !"frame-pointer", i32 2}
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!9 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !10, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13)
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!10 = !DISubroutineType(types: !11)
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!11 = !{null, !12}
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!12 = !DIBasicType(name: "unsigned long long", size: 64, encoding: DW_ATE_unsigned)
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!13 = !{}
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!15 = !DILocalVariable(name: "y", scope: !16, file: !1, line: 4, type: !12)
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!16 = distinct !DILexicalBlock(scope: !17, file: !1, line: 3, column: 23)
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!17 = distinct !DILexicalBlock(scope: !18, file: !1, line: 3, column: 3)
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!18 = distinct !DILexicalBlock(scope: !9, file: !1, line: 3, column: 3)
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!29 = !DILocation(line: 4, column: 24, scope: !16)
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