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carbon-lang/toolchain/driver/testdata/compile/optimize/optimize_size.carbon
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Dana Jansens 7beb29f8b2 Use a fallback loc for diagnostics generated on canonical insts (#7967) 
We allow using `InstId` as a `LocId` for diagnostics, which works great
in `handle_*` functions, where we are working with non-canonical insts.
And convert and pattern matching often are given non-canonical insts,
which they can use, or pull apart to find some other inst, and use those
as a location for diagnostics. However these operations can also be
called with canonical insts, which have no location. In that case if we
need to diagnose an error, it ends up not being attached to any code at
all. Since we always have a `LocId` somewhere up the call stack, pass it
along and in these places that handle canonical instructions too, use
`GetInstLocationOrFallback()` to get a valid location for diagnostics.

This is also similar to what eval does with its fallback `LocId`.

The result is that many diagnostics now have a location where they had
none before. It also means some insts don't get `<elided>` in formatted
semir for not having a location at all and thus not being in range.
2026-10-15 19:03:10 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// ARGS: compile --optimize=size foo.carbon --target=x86_64-unknown-linux-gnu --phase=lower --dump-llvm-ir --exclude-dump-file-prefix=%{core}
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/driver/testdata/compile/optimize/optimize_size.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/driver/testdata/compile/optimize/optimize_size.carbon
// --- foo.carbon
fn Rand() -> i32;
fn NoInlineWithOz() -> i32 {
return Rand() + Rand();
}
fn CallNoInlineWithOptSize() -> i32 {
// Should not be inlined with --optimize=size, because the body is larger than the call.
return NoInlineWithOz();
}
fn VectorizedWithOptSpeed(a: array(i32, 65536)*) {
// Should be vectorized with --optimize=speed, but not in other modes.
var n: i32 = 0;
while (n < 65536) {
(*a)[n] *= 2;
++n;
}
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'foo.carbon'
// CHECK:STDOUT: source_filename = "foo.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: declare i32 @_CRand.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define i32 @_CNoInlineWithOz.Main() #0 !dbg !10 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %Rand.call.loc4_15 = call i32 @_CRand.Main(), !dbg !13
// CHECK:STDOUT: %Rand.call.loc4_24 = call i32 @_CRand.Main(), !dbg !14
// CHECK:STDOUT: %Int.as.AddWith.impl.Op.call = add i32 %Rand.call.loc4_15, %Rand.call.loc4_24, !dbg !13
// CHECK:STDOUT: ret i32 %Int.as.AddWith.impl.Op.call, !dbg !15
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define i32 @_CCallNoInlineWithOptSize.Main() #0 !dbg !16 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %NoInlineWithOz.call = call i32 @_CNoInlineWithOz.Main(), !dbg !19
// CHECK:STDOUT: ret i32 %NoInlineWithOz.call, !dbg !20
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define void @_CVectorizedWithOptSpeed.Main(ptr %a) #0 !dbg !21 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %n.var = alloca i32, align 4, !dbg !24
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !24
// CHECK:STDOUT: store i32 0, ptr %n.var, align 4, !dbg !24
// CHECK:STDOUT: br label %while.cond, !dbg !26
// CHECK:STDOUT:
// CHECK:STDOUT: while.cond: ; preds = %while.body, %entry
// CHECK:STDOUT: %.loc15_10 = load i32, ptr %n.var, align 4, !dbg !27
// CHECK:STDOUT: %Int.as.OrderedWith.impl.Less.call = icmp slt i32 %.loc15_10, 65536, !dbg !27
// CHECK:STDOUT: br i1 %Int.as.OrderedWith.impl.Less.call, label %while.body, label %while.done, !dbg !26
// CHECK:STDOUT:
// CHECK:STDOUT: while.body: ; preds = %while.cond
// CHECK:STDOUT: %.loc16_10 = load i32, ptr %n.var, align 4, !dbg !30
// CHECK:STDOUT: %.loc16_11.array.index = getelementptr inbounds [65536 x i32], ptr %a, i32 0, i32 %.loc16_10, !dbg !31
// CHECK:STDOUT: %Int.as.MulAssignWith.impl.Op.call = load i32, ptr %.loc16_11.array.index, align 4, !dbg !31
// CHECK:STDOUT: %Int.as.MulAssignWith.impl.Op.call1 = mul i32 %Int.as.MulAssignWith.impl.Op.call, 2, !dbg !31
// CHECK:STDOUT: store i32 %Int.as.MulAssignWith.impl.Op.call1, ptr %.loc16_11.array.index, align 4, !dbg !31
// CHECK:STDOUT: call void @"_COp.Int.9452f4c51951679b.Core:Inc.Core.be1e879c1ad406d8"(ptr %n.var), !dbg !33
// CHECK:STDOUT: br label %while.cond, !dbg !34
// CHECK:STDOUT:
// CHECK:STDOUT: while.done: ; preds = %while.cond
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %n.var), !dbg !24
// CHECK:STDOUT: ret void, !dbg !35
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %self) #0 !dbg !37 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !39
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define linkonce_odr void @"_COp.Int.9452f4c51951679b.Core:Inc.Core.be1e879c1ad406d8"(ptr %self) #0 !dbg !42 {
// CHECK:STDOUT: call void @"_COp:thunk:AddAssignWith.b59e374b0649c9ad.Core:Int.9452f4c51951679b.Core:AddAssignWith.ab03190a9e911cb4.Core.306167be98c24f26"(ptr %self, i32 1), !dbg !45
// CHECK:STDOUT: ret void, !dbg !48
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline minsize nounwind optsize
// CHECK:STDOUT: define linkonce_odr void @"_COp:thunk:AddAssignWith.b59e374b0649c9ad.Core:Int.9452f4c51951679b.Core:AddAssignWith.ab03190a9e911cb4.Core.306167be98c24f26"(ptr %self, i32 %other) #2 !dbg !50 {
// CHECK:STDOUT: %1 = call i32 @"_CConvert.df8c28cb3df17b7d:ImplicitAs.c95da57eee1d2d0f.Core.25ef994321ea0701"(i32 %other), !dbg !54
// CHECK:STDOUT: %2 = load i32, ptr %self, align 4, !dbg !54
// CHECK:STDOUT: %3 = add i32 %2, %1, !dbg !54
// CHECK:STDOUT: store i32 %3, ptr %self, align 4, !dbg !54
// CHECK:STDOUT: ret void, !dbg !54
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define linkonce_odr i32 @"_CConvert.df8c28cb3df17b7d:ImplicitAs.c95da57eee1d2d0f.Core.25ef994321ea0701"(i32 %self) #0 !dbg !58 {
// CHECK:STDOUT: %1 = call i32 @"_CAsInt.Int.9452f4c51951679b.Core:AnyInt.Core.be1e879c1ad406d8"(i32 %self), !dbg !63
// CHECK:STDOUT: ret i32 %1, !dbg !65
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: minsize nounwind optsize
// CHECK:STDOUT: define linkonce_odr i32 @"_CAsInt.Int.9452f4c51951679b.Core:AnyInt.Core.be1e879c1ad406d8"(i32 %self) #0 !dbg !67 {
// CHECK:STDOUT: ret i32 %self, !dbg !73
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { minsize nounwind optsize }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { alwaysinline minsize nounwind optsize }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!1}
// CHECK:STDOUT: !llvm.module.flags = !{!75, !76}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !DIFile(filename: "foo.carbon", directory: "")
// CHECK:STDOUT: !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !0, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !2 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !3 = !{!2}
// CHECK:STDOUT: !4 = !DISubroutineType(types: !3)
// CHECK:STDOUT: !5 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !6 = !{null, !5}
// CHECK:STDOUT: !7 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !8 = !{null, !2}
// CHECK:STDOUT: !9 = !DISubroutineType(types: !8)
// CHECK:STDOUT: !10 = distinct !DISubprogram(name: "NoInlineWithOz", linkageName: "_CNoInlineWithOz.Main", scope: null, file: !0, line: 3, type: !4, spFlags: DISPFlagDefinition, unit: !1)
// CHECK:STDOUT: !13 = !DILocation(line: 4, column: 10, scope: !10)
// CHECK:STDOUT: !14 = !DILocation(line: 4, column: 19, scope: !10)
// CHECK:STDOUT: !15 = !DILocation(line: 4, column: 3, scope: !10)
// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "CallNoInlineWithOptSize", linkageName: "_CCallNoInlineWithOptSize.Main", scope: null, file: !0, line: 7, type: !4, spFlags: DISPFlagDefinition, unit: !1)
// CHECK:STDOUT: !19 = !DILocation(line: 9, column: 10, scope: !16)
// CHECK:STDOUT: !20 = !DILocation(line: 9, column: 3, scope: !16)
// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "VectorizedWithOptSpeed", linkageName: "_CVectorizedWithOptSpeed.Main", scope: null, file: !0, line: 12, type: !7, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !36)
// CHECK:STDOUT: !22 = !DILocalVariable(arg: 1, scope: !21, type: !5)
// CHECK:STDOUT: !24 = !DILocation(line: 14, column: 3, scope: !21)
// CHECK:STDOUT: !26 = !DILocation(line: 15, column: 9, scope: !21)
// CHECK:STDOUT: !27 = !DILocation(line: 15, column: 10, scope: !21)
// CHECK:STDOUT: !30 = !DILocation(line: 16, column: 10, scope: !21)
// CHECK:STDOUT: !31 = !DILocation(line: 16, column: 5, scope: !21)
// CHECK:STDOUT: !33 = !DILocation(line: 17, column: 5, scope: !21)
// CHECK:STDOUT: !34 = !DILocation(line: 15, column: 3, scope: !21)
// CHECK:STDOUT: !35 = !DILocation(line: 12, column: 1, scope: !21)
// CHECK:STDOUT: !36 = !{!22}
// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", scope: null, file: !0, line: 14, type: !9, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !40)
// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !37, type: !2)
// CHECK:STDOUT: !39 = !DILocation(line: 14, column: 3, scope: !37)
// CHECK:STDOUT: !40 = !{!38}
// CHECK:STDOUT: !41 = !DIFile(filename: "{{.*}}/prelude/types/int.carbon", directory: "")
// CHECK:STDOUT: !42 = distinct !DISubprogram(name: "Op", linkageName: "_COp.Int.9452f4c51951679b.Core:Inc.Core.be1e879c1ad406d8", scope: null, file: !41, line: 396, type: !9, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !49)
// CHECK:STDOUT: !43 = !DILocalVariable(arg: 1, scope: !42, type: !2)
// CHECK:STDOUT: !45 = !DILocation(line: 398, column: 5, scope: !42)
// CHECK:STDOUT: !46 = !{null, !2, !2}
// CHECK:STDOUT: !47 = !DISubroutineType(types: !46)
// CHECK:STDOUT: !48 = !DILocation(line: 396, column: 3, scope: !42)
// CHECK:STDOUT: !49 = !{!43}
// CHECK:STDOUT: !50 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk:AddAssignWith.b59e374b0649c9ad.Core:Int.9452f4c51951679b.Core:AddAssignWith.ab03190a9e911cb4.Core.306167be98c24f26", scope: null, file: !41, line: 331, type: !47, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !57)
// CHECK:STDOUT: !51 = !DILocalVariable(arg: 1, scope: !50, type: !2)
// CHECK:STDOUT: !52 = !DILocalVariable(arg: 2, scope: !50, type: !2)
// CHECK:STDOUT: !54 = !DILocation(line: 331, column: 3, scope: !50)
// CHECK:STDOUT: !55 = !{!2, !2}
// CHECK:STDOUT: !56 = !DISubroutineType(types: !55)
// CHECK:STDOUT: !57 = !{!51, !52}
// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.df8c28cb3df17b7d:ImplicitAs.c95da57eee1d2d0f.Core.25ef994321ea0701", scope: null, file: !41, line: 64, type: !56, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !66)
// CHECK:STDOUT: !59 = !DILocalVariable(arg: 1, scope: !58, type: !2)
// CHECK:STDOUT: !63 = !DILocation(line: 66, column: 17, scope: !58)
// CHECK:STDOUT: !65 = !DILocation(line: 66, column: 5, scope: !58)
// CHECK:STDOUT: !66 = !{!59}
// CHECK:STDOUT: !67 = distinct !DISubprogram(name: "AsInt", linkageName: "_CAsInt.Int.9452f4c51951679b.Core:AnyInt.Core.be1e879c1ad406d8", scope: null, file: !41, line: 59, type: !56, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !74)
// CHECK:STDOUT: !68 = !DILocalVariable(arg: 1, scope: !67, type: !2)
// CHECK:STDOUT: !73 = !DILocation(line: 59, column: 28, scope: !67)
// CHECK:STDOUT: !74 = !{!68}
// CHECK:STDOUT: !75 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !76 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT:
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