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094572701d
This patch makes the final major change of the RemoveDIs project, changing the default IR output from debug intrinsics to debug records. This is expected to break a large number of tests: every single one that tests for uses or declarations of debug intrinsics and does not explicitly disable writing records. If this patch has broken your downstream tests (or upstream tests on a configuration I wasn't able to run): 1. If you need to immediately unblock a build, pass `--write-experimental-debuginfo=false` to LLVM's option processing for all failing tests (remember to use `-mllvm` for clang/flang to forward arguments to LLVM). 2. For most test failures, the changes are trivial and mechanical, enough that they can be done by script; see the migration guide for a guide on how to do this: https://llvm.org/docs/RemoveDIsDebugInfo.html#test-updates 3. If any tests fail for reasons other than FileCheck check lines that need updating, such as assertion failures, that is most likely a real bug with this patch and should be reported as such. For more information, see the recent PSA: https://discourse.llvm.org/t/psa-ir-output-changing-from-debug-intrinsics-to-debug-records/79578
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// RUN: %clang_cc1 -triple x86_64-none-linux-gnu -debug-info-kind=standalone -O0 \
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// RUN: -emit-llvm -fexperimental-assignment-tracking=forced %s -o - \
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// RUN: -disable-O0-optnone \
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// RUN: | FileCheck %s
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// Check that the (debug) codegen looks right with assignment tracking
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// enabled. Each fragment that is written to should have a dbg.assign that has
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// the DIAssignID of the write as an argument. The fragment offset and size
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// should match the offset into the base storage and size of the store. Each of
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// the scenarios below results in slightly different arguments generated for
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// the memcpy.
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// Test write a complete struct field only.
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void fragmentWhole()
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{
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struct Record {
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int num;
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char ch;
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};
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Record dest;
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char src = '\0';
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__builtin_memcpy(&dest.ch, &src, sizeof(char));
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}
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// CHECK: call void @llvm.memcpy{{.+}}, !DIAssignID ![[memberID:[0-9]+]]
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// CHECK-NEXT: #dbg_assign({{.*}}undef, !{{[0-9]+}}, !DIExpression(DW_OP_LLVM_fragment, 32, 8), ![[memberID]], ptr %ch, !DIExpression(),
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// Write starting at a field and overlapping part of another.
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void fragmentWholeToPartial()
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{
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struct Record {
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int num1;
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int num2;
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};
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Record dest;
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char src[5]="\0\0\0\0";
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__builtin_memcpy(&dest.num1, &src, 5);
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}
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// CHECK: call void @llvm.memcpy{{.+}}, !DIAssignID ![[exceed:[0-9]+]]
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// CHECK-NEXT: #dbg_assign({{.*}}undef, !{{[0-9]+}}, !DIExpression(DW_OP_LLVM_fragment, 0, 40), ![[exceed]], ptr %num1, !DIExpression(),
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// Write starting between fields.
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void fragmentPartialToWhole()
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{
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struct record {
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int num1;
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int num2;
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int num3;
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};
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record dest;
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char src[5]="\0\0\0\0";
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__builtin_memcpy((char*)&(dest.num2) + 3, &src, 5);
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}
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// CHECK: call void @llvm.memcpy{{.+}}, !DIAssignID ![[addendID:[0-9]+]]
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// CHECK-NEXT: #dbg_assign({{.*}}undef, !{{.*}}, !DIExpression(DW_OP_LLVM_fragment, 56, 40), ![[addendID]], ptr %add.ptr, !DIExpression(),
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