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Add function debug info descriptions (#4233)

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Still doesn't have line tables, so of limited value (at least now
this'll be enough that LLVM really generates debug info into the
resulting object file (whereas with only the compilation unit metadata,
LLVM will consider it empty and avoid emitting any of it)) - but another
step along the path.

This also doesn't attach the right source location to the functions -
I'll do that in a follow-up change because I think it'll require the
majority of the refactoring between driver and check to extract the
essential functionality sem_ir_diagnostic_converter, I think, to allow
retrieving source locations during lowering.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
This commit is contained in:
David Blaikie
2024-08-22 17:19:30 +00:00
committed by GitHub
co-authored by Jon Ross-Perkins
parent 435ee44e4c
commit ea8ad22a17
102 changed files with 641 additions and 206 deletions
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toolchain/lower/testdata/array/function_param.carbon
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+6 -2
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@@ -21,14 +21,14 @@ fn G() -> i32 {
// CHECK:STDOUT:
// CHECK:STDOUT: @array.loc16_11.1 = internal constant [3 x i32] [i32 1, i32 2, i32 3]
// CHECK:STDOUT:
// CHECK:STDOUT: define i32 @F(ptr %arr, i32 %i) {
// CHECK:STDOUT: define i32 @F(ptr %arr, i32 %i) !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc12_15.2.array.index = getelementptr inbounds [3 x i32], ptr %arr, i32 0, i32 %i
// CHECK:STDOUT: %.loc12_15.3 = load i32, ptr %.loc12_15.2.array.index, align 4
// CHECK:STDOUT: ret i32 %.loc12_15.3
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: define i32 @G() {
// CHECK:STDOUT: define i32 @G() !dbg !7 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc16_20.2.temp = alloca [3 x i32], align 4
// CHECK:STDOUT: %.loc16_20.4.array.index = getelementptr inbounds [3 x i32], ptr %.loc16_20.2.temp, i32 0, i32 0
@@ -51,3 +51,7 @@ fn G() -> i32 {
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "function_param.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", scope: null, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{}
// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "G", scope: null, type: !5, spFlags: DISPFlagDefinition, unit: !2)