1ab68d708a
This helps check clang generated good IR in the first place, as otherwise this can cause UB in subsequent passes, with the final verification pass not catching any issues. This for example would have helped catch https://github.com/llvm/llvm-project/issues/67937 earlier.
61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
/// We support coverage versions 3.4, 4.7 and 4.8.
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/// 3.4 redesigns the format and changed .da to .gcda
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/// 4.7 enables cfg_checksum.
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/// 4.8 (default, compatible with gcov 7) emits the exit block the second.
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// RUN: rm -rf %t && mkdir %t && cd %t
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// RUN: %clang_cc1 -emit-llvm -disable-red-zone -coverage-data-file=/dev/null -coverage-version='304*' %s -o - | \
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// RUN: FileCheck --check-prefixes=CHECK,304 %s
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// RUN: %clang_cc1 -emit-llvm -disable-red-zone -coverage-data-file=/dev/null -coverage-version='407*' %s -o - | \
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// RUN: FileCheck --check-prefixes=CHECK,407 %s
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// RUN: %clang_cc1 -emit-llvm -disable-red-zone -coverage-data-file=/dev/null %s -o - | \
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// RUN: FileCheck --check-prefixes=CHECK,408 %s
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// RUN: %clang_cc1 -emit-llvm -disable-red-zone -coverage-notes-file=aaa.gcno -coverage-data-file=bbb.gcda -debug-info-kind=limited -dwarf-version=4 %s -o - | FileCheck %s --check-prefix GCOV_FILE_INFO
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// RUN: %clang_cc1 -emit-llvm-bc -o /dev/null -fdebug-pass-manager -coverage-data-file=/dev/null %s 2>&1 | FileCheck --check-prefix=NEWPM %s
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// RUN: %clang_cc1 -emit-llvm-bc -o /dev/null -fdebug-pass-manager -coverage-data-file=/dev/null -O3 %s 2>&1 | FileCheck --check-prefix=NEWPM-O3 %s
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// NEWPM: Running pass: VerifierPass
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// NEWPM: Running pass: GCOVProfilerPass
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// NEWPM-O3: Running pass: VerifierPass
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// NEWPM-O3: Running pass: Annotation2MetadataPass
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// NEWPM-O3: Running pass: ForceFunctionAttrsPass
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// NEWPM-O3: Running pass: GCOVProfilerPass
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int test1(int a) {
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switch (a % 2) {
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case 0:
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++a;
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case 1:
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a /= 2;
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}
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return a;
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}
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int test2(int b) {
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return b * 2;
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}
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// CHECK: @__llvm_internal_gcov_emit_function_args.0 = internal unnamed_addr constant [2 x %emit_function_args_ty]
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// CHECK-SAME: [%emit_function_args_ty { i32 0, i32 {{[-0-9]+}}, i32 {{[-0-9]+}} }, %emit_function_args_ty { i32 1, i32 {{[-0-9]+}}, i32 {{[-0-9]+}} }]
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// CHECK: @__llvm_internal_gcov_emit_file_info = internal unnamed_addr constant [1 x %file_info]
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/// 0x3330342a '3' '0' '4' '*'
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// 304-SAME: i32 858797098
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/// 0x3430372a '4' '0' '7' '*'
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// 407-SAME: i32 875575082
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/// 0x3430382a '4' '0' '8' '*'
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// 408-SAME: i32 875575338
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// Check that the noredzone flag is set on the generated functions.
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// CHECK: void @__llvm_gcov_writeout() unnamed_addr [[NRZ:#[0-9]+]]
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// CHECK: void @__llvm_gcov_init() unnamed_addr [[NRZ]]
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// CHECK: attributes [[NRZ]] = { {{.*}}noredzone{{.*}} }
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// GCOV_FILE_INFO: !llvm.gcov = !{![[GCOV:[0-9]+]]}
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// GCOV_FILE_INFO: ![[GCOV]] = !{!"aaa.gcno", !"bbb.gcda", !{{[0-9]+}}}
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