https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/178133
Backport 15365d31e6b407d78d6c26c7b64cecacccccfd39 Requested by: @zyn0217 >From 19bbd0b9cda5d5d526679fb63b0bfb5b2e5d9d60 Mon Sep 17 00:00:00 2001 From: Yexuan Xiao <[email protected]> Date: Tue, 27 Jan 2026 15:50:31 +0800 Subject: [PATCH] [Sema] Fix ICE due to incorrect _Bool handling in format string checking (#174684) Closes #174331 (cherry picked from commit 15365d31e6b407d78d6c26c7b64cecacccccfd39) --- clang/lib/AST/FormatString.cpp | 2 +- clang/test/Sema/format-strings.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/clang/lib/AST/FormatString.cpp b/clang/lib/AST/FormatString.cpp index d4cb89b43ae87..36c5f57671631 100644 --- a/clang/lib/AST/FormatString.cpp +++ b/clang/lib/AST/FormatString.cpp @@ -371,7 +371,7 @@ static clang::analyze_format_string::ArgType::MatchKind matchesSizeTPtrdiffT(ASTContext &C, QualType T, QualType E) { using MatchKind = clang::analyze_format_string::ArgType::MatchKind; - if (!T->isIntegerType()) + if (!T->isIntegerType() || T->isBooleanType()) return MatchKind::NoMatch; if (C.hasSameType(T, E)) diff --git a/clang/test/Sema/format-strings.c b/clang/test/Sema/format-strings.c index 5280549adc3d7..cdac83fc0bb91 100644 --- a/clang/test/Sema/format-strings.c +++ b/clang/test/Sema/format-strings.c @@ -983,3 +983,35 @@ void test_promotion(void) { // pointers printf("%s", i); // expected-warning{{format specifies type 'char *' but the argument has type 'int'}} } + +void test_bool(_Bool b, _Bool* bp) +{ + printf("%zu", b); // expected-warning-re{{format specifies type 'size_t' (aka '{{.+}}') but the argument has type '_Bool'}} + printf("%td", b); // expected-warning-re{{format specifies type 'ptrdiff_t' (aka '{{.+}}') but the argument has type '_Bool'}} + printf("%jd", b); // expected-warning-re{{format specifies type 'intmax_t' (aka '{{.+}}') but the argument has type '_Bool'}} + printf("%lld", b); // expected-warning{{format specifies type 'long long' but the argument has type '_Bool'}} + printf("%ld", b); // expected-warning{{format specifies type 'long' but the argument has type '_Bool'}} + printf("%d", b); // promoted from _Bool to int + printf("%hhd", b); // promoted from _Bool to int + printf("%hd", b); // promoted from _Bool to int +#if !defined(__Fuchsia__) && !defined(__ANDROID__) //'%n' specifier not supported on this platform + // The n conversion specifier only supports signed types + printf("%zn", bp); // expected-warning-re{{format specifies type 'signed size_t *' (aka '{{.+}}') but the argument has type '_Bool *'}} + printf("%jn", bp); // expected-warning-re{{format specifies type 'intmax_t *' (aka '{{.+}}') but the argument has type '_Bool *'}} + printf("%lln", bp); // expected-warning{{format specifies type 'long long *' but the argument has type '_Bool *'}} + printf("%ln", bp); // expected-warning{{format specifies type 'long *' but the argument has type '_Bool *'}} + printf("%n", bp); // expected-warning{{format specifies type 'int *' but the argument has type '_Bool *'}} + printf("%hhn", bp); // expected-warning{{format specifies type 'signed char *' but the argument has type '_Bool *'}} + printf("%hn", bp); // belong to -Wformat-type-confusion +#endif + printf("%c", b); // expected-warning{{using '%c' format specifier, but argument has boolean value}} + printf("%s", b); // expected-warning{{format specifies type 'char *' but the argument has type '_Bool'}} + printf("%d", b); // promoted from _Bool to int + printf("%o", b); // promoted from _Bool to int + printf("%x", b); // promoted from _Bool to int + printf("%u", b); // promoted from _Bool to int + printf("%f", b); // expected-warning{{format specifies type 'double' but the argument has type '_Bool'}} + printf("%e", b); // expected-warning{{format specifies type 'double' but the argument has type '_Bool'}} + printf("%a", b); // expected-warning{{format specifies type 'double' but the argument has type '_Bool'}} + printf("%g", b); // expected-warning{{format specifies type 'double' but the argument has type '_Bool'}} +} _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
