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a548eff0bb
This seems to be enough to avoid naming collisions for functions in any of the current test cases (verified by asserting that the name of the `llvm::Function` matches the name passed to create it - not triggering LLVM's numbering that happens when names collide) It currently implements mangling for namespace scopes, class scopes, and impls. Nothing generic is mangled yet - haven't looked at how that works, though evidently it's not covered by existing testing, I guess. Follow-up change will document the current mangling algorithm in `toolchain/docs/lower.md` --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com> Co-authored-by: Carbon Infra Bot <carbon-external-infra@google.com>
96 lines
4.5 KiB
Plaintext
96 lines
4.5 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/while/preheader.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/while/preheader.carbon
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fn Cond() -> bool;
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fn F();
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fn G();
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// TODO: It would be better to preserve the loop preheader blocks from SemIR
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// into LLVM IR. If we don't, LLVM will recreate them for us as part of loop
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// canonicalization.
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fn While() {
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while (Cond()) {
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F();
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}
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if (Cond()) {
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while (Cond()) {
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G();
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}
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}
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}
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// CHECK:STDOUT: ; ModuleID = 'preheader.carbon'
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// CHECK:STDOUT: source_filename = "preheader.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare i1 @_CCond.Main()
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare void @_CF.Main()
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare void @_CG.Main()
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CWhile.Main() !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: br label %while.cond.loc20
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.cond.loc20: ; preds = %entry, %while.body.loc20
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// CHECK:STDOUT: %Cond.call.loc20 = call i1 @_CCond.Main(), !dbg !7
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// CHECK:STDOUT: br i1 %Cond.call.loc20, label %while.body.loc20, label %while.done.loc20, !dbg !8
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.body.loc20: ; preds = %while.cond.loc20
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// CHECK:STDOUT: call void @_CF.Main(), !dbg !9
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// CHECK:STDOUT: br label %while.cond.loc20, !dbg !10
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.done.loc20: ; preds = %while.cond.loc20
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// CHECK:STDOUT: %Cond.call.loc24 = call i1 @_CCond.Main(), !dbg !11
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// CHECK:STDOUT: br i1 %Cond.call.loc24, label %while.cond.loc25, label %if.else, !dbg !12
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.cond.loc25: ; preds = %while.body.loc25, %while.done.loc20
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// CHECK:STDOUT: %Cond.call.loc25 = call i1 @_CCond.Main(), !dbg !13
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// CHECK:STDOUT: br i1 %Cond.call.loc25, label %while.body.loc25, label %while.done.loc25, !dbg !14
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.body.loc25: ; preds = %while.cond.loc25
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// CHECK:STDOUT: call void @_CG.Main(), !dbg !15
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// CHECK:STDOUT: br label %while.cond.loc25, !dbg !16
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.done.loc25: ; preds = %while.cond.loc25
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// CHECK:STDOUT: br label %if.else, !dbg !17
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.else: ; preds = %while.done.loc25, %while.done.loc20
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// CHECK:STDOUT: ret void, !dbg !18
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; uselistorder directives
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// CHECK:STDOUT: uselistorder label %while.cond.loc20, { 1, 0 }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "preheader.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "While", linkageName: "_CWhile.Main", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{}
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// CHECK:STDOUT: !7 = !DILocation(line: 20, column: 10, scope: !4)
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// CHECK:STDOUT: !8 = !DILocation(line: 20, column: 9, scope: !4)
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// CHECK:STDOUT: !9 = !DILocation(line: 21, column: 5, scope: !4)
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// CHECK:STDOUT: !10 = !DILocation(line: 20, column: 3, scope: !4)
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// CHECK:STDOUT: !11 = !DILocation(line: 24, column: 7, scope: !4)
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// CHECK:STDOUT: !12 = !DILocation(line: 24, column: 6, scope: !4)
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// CHECK:STDOUT: !13 = !DILocation(line: 25, column: 12, scope: !4)
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// CHECK:STDOUT: !14 = !DILocation(line: 25, column: 11, scope: !4)
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// CHECK:STDOUT: !15 = !DILocation(line: 26, column: 7, scope: !4)
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// CHECK:STDOUT: !16 = !DILocation(line: 25, column: 5, scope: !4)
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// CHECK:STDOUT: !17 = !DILocation(line: 24, column: 3, scope: !4)
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// CHECK:STDOUT: !18 = !DILocation(line: 19, column: 1, scope: !4)
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