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b4639068c9
Summary: D74269 added debug info to newly created instructions, including calls to `malloc` and `free`, by taking debug info from existing instructions around, whose debug info may or may not be empty. But there are cases debug info is required by the IR verifier: when both the caller and the callee functions have DISubprograms, meaning we already have declarations to `malloc` or `free` with a DISubprogram attached, newly created calls to `malloc` and `free` should have non-empty debug info. This patch creates a non-empty dummy debug info in this case to those calls to make the IR verifier pass. Fixes https://bugs.llvm.org/show_bug.cgi?id=45461. Reviewers: dschuff Subscribers: aprantl, sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D77784
88 lines
3.3 KiB
LLVM
88 lines
3.3 KiB
LLVM
; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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%struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] }
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; Basic debug info test. All existing instructions have debug info and inserted
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; 'malloc' and 'free' calls take debug info from the next instruction.
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define void @setjmp_debug_info0() !dbg !3 {
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; CHECK-LABEL: @setjmp_debug_info0
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16, !dbg !4
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0, !dbg !5
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0, !dbg !6
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call void @foo(), !dbg !7
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ret void, !dbg !8
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; CHECK: entry:
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; CHECK-NEXT: call i8* @malloc(i32 40), !dbg ![[DL0:.*]]
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; CHECK-NEXT: bitcast {{.*}}, !dbg ![[DL0]]
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; CHECK: alloca {{.*}}, !dbg ![[DL0]]
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; CHECK: call i32* @saveSetjmp{{.*}}, !dbg ![[DL1:.*]]
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; CHECK-NEXT: call i32 @getTempRet0{{.*}}, !dbg ![[DL1]]
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; CHECK-NEXT: br {{.*}}, !dbg ![[DL2:.*]]
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; CHECK: entry.split:
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; CHECK: call {{.*}} void @__invoke_void{{.*}}, !dbg ![[DL2]]
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; CHECK: entry.split.split:
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; CHECK-NEXT: bitcast {{.*}}, !dbg ![[DL3:.*]]
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; CHECK-NEXT: call void @free{{.*}}, !dbg ![[DL3]]
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; CHECK: if.then1:
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; CHECK: call i32 @testSetjmp{{.*}}, !dbg ![[DL2]]
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; CHECK: if.end:
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; CHECK: call i32 @getTempRet0{{.*}}, !dbg ![[DL2]]
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; CHECK: if.then2:
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; CHECK: call void @emscripten_longjmp{{.*}}, !dbg ![[DL2]]
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; CHECK: if.end2:
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; CHECK: call void @setTempRet0{{.*}}, !dbg ![[DL2]]
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}
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; No instruction has debug info but the current function (setjmp_debug_info2)
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; and the called function (malloc / free) have DISubprograms, so the newly
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; generated calls should have debug info attached. We don't have an instruction
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; to take debug info from, so we create dummy debug info.
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define void @setjmp_debug_info1() !dbg !9 {
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; CHECK-LABEL: @setjmp_debug_info1
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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call void @foo()
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ret void
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; CHECK: call i8* @malloc(i32 40), !dbg ![[DL_DUMMY:.*]]
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; CHECK: call void @free{{.*}}, !dbg ![[DL_DUMMY]]
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}
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; Note that these functions have DISubprograms.
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declare !dbg !10 i8* @malloc(i32)
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declare !dbg !11 void @free(i8*)
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declare void @foo()
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; Function Attrs: returns_twice
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declare i32 @setjmp(%struct.__jmp_buf_tag*) #0
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = !DIFile(filename: "lower-em-sjlj.c", directory: "test")
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
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!3 = distinct !DISubprogram(name: "setjmp_debug_info0", unit:!2, file: !1, line: 1)
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!4 = !DILocation(line:2, scope: !3)
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!5 = !DILocation(line:3, scope: !3)
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!6 = !DILocation(line:4, scope: !3)
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!7 = !DILocation(line:5, scope: !3)
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!8 = !DILocation(line:6, scope: !3)
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!9 = distinct !DISubprogram(name: "setjmp_debug_info1", unit:!2, file: !1, line: 50)
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!10 = !DISubprogram(name: "malloc", file: !1, line: 10, isDefinition: false)
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!11 = !DISubprogram(name: "free", file: !1, line: 20, isDefinition: false)
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; Dummy debug info generated
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; CHECK: ![[DL_DUMMY]] = !DILocation(line: 50, column: 1, scope: !9)
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