[clang] [MC/DC] Update CoverageMapping tests (PR #125404)
NAKAMURA Takumi via cfe-commits
cfe-commits at lists.llvm.org
Sun Feb 2 05:25:30 PST 2025
https://github.com/chapuni created https://github.com/llvm/llvm-project/pull/125404
To resolve the error, rename mcdc-error-nests.cpp -> mcdc-nested-expr.cpp at first.
- `func_condop` A corner case that contains close decisions.
- `func_expect` Uses `__builtin_expect`. (#124565)
- `func_lnot` Contains logical not(s) `!` among MC/DC binary operators. (#124563)
mcdc-single-cond.cpp is for #95336 .
>From a6d4be0e4b05b411c7160385485cfed0f173965c Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic at gmail.com>
Date: Sun, 2 Feb 2025 21:55:43 +0900
Subject: [PATCH] [MC/DC] Update CoverageMapping tests
To resolve the error, rename mcdc-error-nests.cpp -> mcdc-nested-expr.cpp at first.
- `func_condop`
A corner case that contains close decisions.
- `func_expect`
Uses `__builtin_expect`. (#124565)
- `func_lnot`
Contains logical not(s) `!` among MC/DC binary operators. (#124563)
mcdc-single-cond.cpp is for #95336.
---
.../test/CoverageMapping/mcdc-error-nests.cpp | 10 --
.../test/CoverageMapping/mcdc-nested-expr.cpp | 34 +++++++
.../test/CoverageMapping/mcdc-single-cond.cpp | 97 +++++++++++++++++++
3 files changed, 131 insertions(+), 10 deletions(-)
delete mode 100644 clang/test/CoverageMapping/mcdc-error-nests.cpp
create mode 100644 clang/test/CoverageMapping/mcdc-nested-expr.cpp
create mode 100644 clang/test/CoverageMapping/mcdc-single-cond.cpp
diff --git a/clang/test/CoverageMapping/mcdc-error-nests.cpp b/clang/test/CoverageMapping/mcdc-error-nests.cpp
deleted file mode 100644
index 3add2b9ccd3fb3d..000000000000000
--- a/clang/test/CoverageMapping/mcdc-error-nests.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 -fcoverage-mcdc -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only %s 2>&1| FileCheck %s
-
-// "Split-nest" -- boolean expressions within boolean expressions.
-extern bool bar(bool);
-bool func_split_nest(bool a, bool b, bool c, bool d, bool e, bool f, bool g) {
- bool res = a && b && c && bar(d && e) && f && g;
- return bar(res);
-}
-
-// CHECK: warning: unsupported MC/DC boolean expression; contains an operation with a nested boolean expression.
diff --git a/clang/test/CoverageMapping/mcdc-nested-expr.cpp b/clang/test/CoverageMapping/mcdc-nested-expr.cpp
new file mode 100644
index 000000000000000..bb82873e3b600d0
--- /dev/null
+++ b/clang/test/CoverageMapping/mcdc-nested-expr.cpp
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 -fcoverage-mcdc -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only %s 2> %t.stderr.txt | FileCheck %s
+// RUN: FileCheck %s --check-prefix=WARN < %t.stderr.txt
+
+// "Split-nest" -- boolean expressions within boolean expressions.
+extern bool bar(bool);
+// CHECK: func_split_nest{{.*}}:
+bool func_split_nest(bool a, bool b, bool c, bool d, bool e, bool f, bool g) {
+ // WARN: :[[@LINE+1]]:14: warning: unsupported MC/DC boolean expression; contains an operation with a nested boolean expression.
+ bool res = a && b && c && bar(d && e) && f && g;
+ return bar(res);
+}
+
+// The inner expr begins with the same Loc as the outer expr
+// CHECK: func_condop{{.*}}:
+bool func_condop(bool a, bool b, bool c) {
+ // WARN: :[[@LINE+1]]:10: warning: unsupported MC/DC boolean expression; contains an operation with a nested boolean expression.
+ return (a && b ? true : false) && c;
+}
+
+// __builtin_expect
+// Treated as parentheses.
+// CHECK: func_expect{{.*}}:
+bool func_expect(bool a, bool b, bool c) {
+ // WARN: :[[@LINE+1]]:10: warning: unsupported MC/DC boolean expression; contains an operation with a nested boolean expression.
+ return a || __builtin_expect(b && c, true);
+}
+
+// LNot among BinOp(s)
+// Doesn't split exprs.
+// CHECK: func_lnot{{.*}}:
+bool func_lnot(bool a, bool b, bool c, bool d) {
+ // WARN: :[[@LINE+1]]:10: warning: unsupported MC/DC boolean expression; contains an operation with a nested boolean expression.
+ return !(a || b) && !(c && d);
+}
diff --git a/clang/test/CoverageMapping/mcdc-single-cond.cpp b/clang/test/CoverageMapping/mcdc-single-cond.cpp
new file mode 100644
index 000000000000000..b1eeea879e52176
--- /dev/null
+++ b/clang/test/CoverageMapping/mcdc-single-cond.cpp
@@ -0,0 +1,97 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 -fcoverage-mcdc -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -disable-llvm-passes -emit-llvm -o %t2.ll %s | FileCheck %s --check-prefixes=MM,MM2
+// RUN: FileCheck %s --check-prefixes=LL,LL2 < %t2.ll
+
+// LL: define{{.+}}func_cond{{.+}}(
+// MM: func_cond{{.*}}:
+int func_cond(bool a, bool b) {
+ // %mcdc.addr* are emitted by static order.
+ // LL: %[[MA:mcdc.addr.*]] = alloca i32, align 4
+ // LL: call void @llvm.instrprof.mcdc.parameters(ptr @[[PROFN:.+]], i64 [[#H:]], i32 [[#BS:]])
+ int count = 0;
+ if (a)
+ // NB=2 Single cond
+ // MM2-NOT: Decision
+ ++count;
+ if (a ? true : false)
+ // NB=2,2 Wider decision comes first.
+ // MA2 has C:2
+ // MA3 has C:1
+ ++count;
+ if (a && b ? true : false)
+ // NB=2,3 Wider decision comes first.
+ // MM2: Decision,File 0, [[@LINE-2]]:7 -> [[#L:@LINE-2]]:13 = M:[[#I:3]], C:2
+ // MM: Branch,File 0, [[#L]]:7 -> [[#L]]:8 = #6, (#0 - #6) [1,2,0]
+ // MM: Branch,File 0, [[#L]]:12 -> [[#L]]:13 = #7, (#6 - #7) [2,0,0]
+ // LL: store i32 0, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL2: call void @llvm.instrprof.mcdc.tvbitmap.update(ptr @[[PROFN]], i64 [[#H]], i32 [[#B:0]], ptr %[[MA]])
+ ++count;
+ while (a || true) {
+ // NB=3 BinOp only
+ // MM: Decision,File 0, [[@LINE-2]]:10 -> [[#L:@LINE-2]]:19 = M:[[#I:I+3]], C:2
+ // MM: Branch,File 0, [[#L]]:10 -> [[#L]]:11 = (#0 - #9), #9 [1,0,2]
+ // MM: Branch,File 0, [[#L]]:15 -> [[#L]]:19 = (#9 - #10), 0 [2,0,0]
+ // LL: store i32 0, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL2: call void @llvm.instrprof.mcdc.tvbitmap.update(ptr @[[PROFN]], i64 [[#H]], i32 [[#B:B+3]], ptr %[[MA]])
+ ++count;
+ break;
+ }
+ while (a || true ? false : true) {
+ // Wider decision comes first.
+ // MM2: Decision,File 0, [[@LINE-2]]:10 -> [[#L:@LINE-2]]:19 = M:[[#I:I+3]], C:2
+ // MM: Branch,File 0, [[#L]]:10 -> [[#L]]:11 = ((#0 + #11) - #13), #13 [1,0,2]
+ // MM: Branch,File 0, [[#L]]:15 -> [[#L]]:19 = (#13 - #14), 0 [2,0,0]
+ // LL: store i32 0, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: call void @llvm.instrprof.mcdc.tvbitmap.update(ptr @[[PROFN]], i64 [[#H]], i32 [[#B:B+3]], ptr %[[MA]])
+ ++count;
+ }
+ do {
+ ++count;
+ } while (a && false);
+ // BinOp only
+ // MM: Decision,File 0, [[@LINE-2]]:12 -> [[#L:@LINE-2]]:22 = M:[[#I:I+3]], C:2
+ // MM: Branch,File 0, [[#L]]:12 -> [[#L]]:13 = #16, ((#0 + #15) - #16) [1,2,0]
+ // MM: Branch,File 0, [[#L]]:17 -> [[#L]]:22 = 0, (#16 - #17) [2,0,0]
+ // LL: store i32 0, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL2: call void @llvm.instrprof.mcdc.tvbitmap.update(ptr @[[PROFN]], i64 [[#H]], i32 [[#B:B+3]], ptr %[[MA]])
+ do {
+ ++count;
+ } while (a && false ? true : false);
+ // Wider decision comes first.
+ // MM2: Decision,File 0, [[@LINE-2]]:12 -> [[#L:@LINE-2]]:22 = M:15, C:2
+ // MM: Branch,File 0, [[#L]]:12 -> [[#L]]:13 = #20, ((#0 + #18) - #20) [1,2,0]
+ // MM: Branch,File 0, [[#L]]:17 -> [[#L]]:22 = 0, (#20 - #21) [2,0,0]
+ // LL: store i32 0, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: = load i32, ptr %[[MA]], align 4
+ // LL: store i32 %{{.+}}, ptr %[[MA]], align 4
+ // LL: call void @llvm.instrprof.mcdc.tvbitmap.update(ptr @[[PROFN]], i64 [[#H]], i32 [[#B:B+3]], ptr %[[MA]])
+ // FIXME: Confirm (B+3==BS)
+ for (int i = 0; i < (a ? 2 : 1); ++i) {
+ // Simple nested decision (different column)
+ // MM2-NOT: Decision
+ // LL2-NOT: call void @llvm.instrprof.mcdc.tvbitmap.update
+ ++count;
+ }
+ for (int i = 0; i >= 4 ? false : true; ++i) {
+ // Wider decision comes first.
+ ++count;
+ }
+ return count;
+}
More information about the cfe-commits
mailing list