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https://github.com/carbon-language/carbon-lang.git
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aa69a484eb
Adds a flag `--optimize=<mode>` that specifies what to optimize for: * `--optimize=none` turns off the optimizer as much as possible, but still respects always_inline. * `--optimize=debug` aims to be the equivalent of `-Og` / `-O1`, and provides optimizations that don't affect the ability to debug the program. This is the default. * `--optimize=size` optimizes for the size of the produced program, and aims to be the equivalent of `-Oz`. * `--optimize=speed` optimizes for the execution time of the produced program, and aims to be the equivalent of `-O3`. Following the approach taken by Clang, the optimization level feeds into both the configuration of the LLVM pass pipeline and the attributes added to function definitions generated by the frontend. Optimization is performed in a new phase, `optimize`, which runs between `lower` and `codegen`. --------- Co-authored-by: Dana Jansens <danakj@orodu.net> Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
118 lines
6.9 KiB
Plaintext
118 lines
6.9 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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// ARGS: compile --optimize=debug foo.carbon --target=x86_64-unknown-linux-gnu --phase=optimize --dump-llvm-ir --exclude-dump-file-prefix=%{core}
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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/driver/testdata/compile/optimize/optimize_debug.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/driver/testdata/compile/optimize/optimize_debug.carbon
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// --- foo.carbon
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import Core library "range";
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fn Rand() -> i32;
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fn NoInlineWithOz() -> i32 {
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return Rand() + Rand();
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}
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fn CallNoInlineWithOptSize() -> i32 {
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// Should not be inlined with --optimize=size, because the body is larger than the call.
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return NoInlineWithOz();
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}
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fn VectorizedWithOptSpeed(a: array(i32, 65536)*) {
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// Should be vectorized with --optimize=speed, but not in other modes.
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var n: i32 = 0;
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while (n < 65536) {
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(*a)[n] *= 2;
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++n;
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}
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}
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// CHECK:STDOUT: ; ModuleID = 'foo.carbon'
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// CHECK:STDOUT: source_filename = "foo.carbon"
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// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare i32 @_CRand.Main() local_unnamed_addr
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define i32 @_CNoInlineWithOz.Main() local_unnamed_addr #0 !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %Rand.call.loc7_15 = tail call i32 @_CRand.Main() #0, !dbg !7
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// CHECK:STDOUT: %Rand.call.loc7_24 = tail call i32 @_CRand.Main() #0, !dbg !8
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// CHECK:STDOUT: %Int.as.AddWith.impl.Op.call = add i32 %Rand.call.loc7_24, %Rand.call.loc7_15, !dbg !7
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// CHECK:STDOUT: ret i32 %Int.as.AddWith.impl.Op.call, !dbg !9
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define i32 @_CCallNoInlineWithOptSize.Main() local_unnamed_addr #0 !dbg !10 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %Rand.call.loc7_15.i = tail call i32 @_CRand.Main() #0, !dbg !11
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// CHECK:STDOUT: %Rand.call.loc7_24.i = tail call i32 @_CRand.Main() #0, !dbg !13
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// CHECK:STDOUT: %Int.as.AddWith.impl.Op.call.i = add i32 %Rand.call.loc7_24.i, %Rand.call.loc7_15.i, !dbg !11
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// CHECK:STDOUT: ret i32 %Int.as.AddWith.impl.Op.call.i, !dbg !14
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite)
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// CHECK:STDOUT: define void @_CVectorizedWithOptSpeed.Main(ptr captures(none) %a) local_unnamed_addr #1 !dbg !15 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: br label %while.body, !dbg !16
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.body: ; preds = %entry, %while.body
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// CHECK:STDOUT: %n.var.03 = phi i32 [ 0, %entry ], [ %1, %while.body ]
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// CHECK:STDOUT: %0 = zext nneg i32 %n.var.03 to i64, !dbg !17
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// CHECK:STDOUT: %.loc19_11.array.index = getelementptr inbounds nuw i32, ptr %a, i64 %0, !dbg !17
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// CHECK:STDOUT: %Int.as.MulAssignWith.impl.Op.call = load i32, ptr %.loc19_11.array.index, align 4, !dbg !17
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// CHECK:STDOUT: %Int.as.MulAssignWith.impl.Op.call1 = shl i32 %Int.as.MulAssignWith.impl.Op.call, 1, !dbg !17
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// CHECK:STDOUT: store i32 %Int.as.MulAssignWith.impl.Op.call1, ptr %.loc19_11.array.index, align 4, !dbg !17
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// CHECK:STDOUT: %1 = add nuw nsw i32 %n.var.03, 1, !dbg !18
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// CHECK:STDOUT: %Int.as.OrderedWith.impl.Less.call = icmp samesign ult i32 %n.var.03, 65535, !dbg !24
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// CHECK:STDOUT: br i1 %Int.as.OrderedWith.impl.Less.call, label %while.body, label %while.done, !dbg !16
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// CHECK:STDOUT:
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// CHECK:STDOUT: while.done: ; preds = %while.body
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// CHECK:STDOUT: ret void, !dbg !25
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; uselistorder directives
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// CHECK:STDOUT: uselistorder label %while.body, { 1, 0 }
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// CHECK:STDOUT: uselistorder i32 %n.var.03, { 0, 2, 1 }
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// CHECK:STDOUT: uselistorder ptr %.loc19_11.array.index, { 1, 0 }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: attributes #0 = { nounwind }
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// CHECK:STDOUT: attributes #1 = { nofree norecurse nosync nounwind memory(argmem: readwrite) }
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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: "foo.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "NoInlineWithOz", linkageName: "_CNoInlineWithOz.Main", scope: null, file: !3, line: 6, 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: 7, column: 10, scope: !4)
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// CHECK:STDOUT: !8 = !DILocation(line: 7, column: 19, scope: !4)
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// CHECK:STDOUT: !9 = !DILocation(line: 7, column: 3, scope: !4)
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// CHECK:STDOUT: !10 = distinct !DISubprogram(name: "CallNoInlineWithOptSize", linkageName: "_CCallNoInlineWithOptSize.Main", scope: null, file: !3, line: 10, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !11 = !DILocation(line: 7, column: 10, scope: !4, inlinedAt: !12)
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// CHECK:STDOUT: !12 = distinct !DILocation(line: 12, column: 10, scope: !10)
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// CHECK:STDOUT: !13 = !DILocation(line: 7, column: 19, scope: !4, inlinedAt: !12)
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// CHECK:STDOUT: !14 = !DILocation(line: 12, column: 3, scope: !10)
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// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "VectorizedWithOptSpeed", linkageName: "_CVectorizedWithOptSpeed.Main", scope: null, file: !3, line: 15, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !16 = !DILocation(line: 18, column: 9, scope: !15)
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// CHECK:STDOUT: !17 = !DILocation(line: 19, column: 5, scope: !15)
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// CHECK:STDOUT: !18 = !DILocation(line: 275, column: 3, scope: !19, inlinedAt: !21)
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// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.Int.Core:AddAssignWith.Core.5dfb78ae56583d8e", scope: null, file: !20, line: 275, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !20 = !DIFile(filename: "{{.*}}/prelude/types/int.carbon", directory: "")
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// CHECK:STDOUT: !21 = distinct !DILocation(line: 341, column: 5, scope: !22, inlinedAt: !23)
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// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "Op", linkageName: "_COp.Int.Core:Inc.Core.be1e879c1ad406d8", scope: null, file: !20, line: 339, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !23 = distinct !DILocation(line: 20, column: 5, scope: !15)
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// CHECK:STDOUT: !24 = !DILocation(line: 18, column: 10, scope: !15)
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// CHECK:STDOUT: !25 = !DILocation(line: 15, column: 1, scope: !15)
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