[clang] [sanitizer] Add plumbing for -fsanitize-add-pseudo-functions and partly replace '-mllvm -array-bounds-pseudofn' (PR #138577)
via cfe-commits
cfe-commits at lists.llvm.org
Mon May 5 13:27:26 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang-driver
Author: Thurston Dang (thurstond)
<details>
<summary>Changes</summary>
Florian1 introduced '-mllvm -array-bounds-pseudofn' (https://github.com/llvm/llvm-project/pull/128977/) to make it easier to see why crashes occurred, and to estimate with a profiler the cycles spent on these array-bounds checks. This functionality could be usefully generalized to other checks in future work.
This patch adds the plumbing for -fsanitize-add-pseudo-functions, and connects it to the existing array-bounds-pseudo-fn functionality i.e., -fsanitize-add-pseudo-functions=array-bounds can be used as a replacement for '-mllvm -array-bounds-pseudofn', though we do not yet delete the latter.
Note: we replaced '-mllvm -array-bounds-pseudofn' in clang/test/CodeGen/bounds-checking-debuginfo.c, because adding test cases would modify the line numbers in the test assertions, and therefore obscure that the test output is the same between '-mllvm -array-bounds-pseudofn' and -fsanitize-add-pseudo-functions=array-bounds.
---
Patch is 23.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/138577.diff
8 Files Affected:
- (modified) clang/include/clang/Basic/CodeGenOptions.h (+3)
- (modified) clang/include/clang/Driver/Options.td (+15)
- (modified) clang/include/clang/Driver/SanitizerArgs.h (+1)
- (modified) clang/lib/CodeGen/CGExpr.cpp (+1-1)
- (modified) clang/lib/Driver/SanitizerArgs.cpp (+17-1)
- (modified) clang/lib/Frontend/CompilerInvocation.cpp (+8)
- (modified) clang/test/CodeGen/bounds-checking-debuginfo.c (+2-2)
- (modified) clang/test/Driver/fsanitize.c (+58)
``````````diff
diff --git a/clang/include/clang/Basic/CodeGenOptions.h b/clang/include/clang/Basic/CodeGenOptions.h
index e39a73bdb13ac..be17c81876ddf 100644
--- a/clang/include/clang/Basic/CodeGenOptions.h
+++ b/clang/include/clang/Basic/CodeGenOptions.h
@@ -399,6 +399,9 @@ class CodeGenOptions : public CodeGenOptionsBase {
/// (0.0 [default] to skip none, 1.0 to skip all).
SanitizerMaskCutoffs SanitizeSkipHotCutoffs;
+ /// Set of sanitizer checks that will be wrapped inside pseudofunctions.
+ SanitizerSet SanitizeAddPseudoFunctions;
+
/// List of backend command-line options for -fembed-bitcode.
std::vector<uint8_t> CmdArgs;
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 11677626dbf1f..c06bc5cfcbfa8 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -2533,6 +2533,21 @@ def fno_sanitize_merge_handlers : Flag<["-"], "fno-sanitize-merge">, Group<f_cla
Alias<fno_sanitize_merge_handlers_EQ>, AliasArgs<["all"]>,
Visibility<[ClangOption, CLOption]>,
HelpText<"Do not allow compiler to merge handlers for any sanitizers">;
+def fsanitize_add_pseudo_functions_EQ
+ : CommaJoined<["-"], "fsanitize-add-pseudo-functions=">,
+ Group<f_clang_Group>,
+ HelpText<"Add pseudo-functions to checks for specified sanitizers">;
+def fno_sanitize_add_pseudo_functions_EQ
+ : CommaJoined<["-"], "fno-sanitize-add-pseudo-functions=">,
+ Group<f_clang_Group>,
+ HelpText<"Do not allow compiler to add pseudo-functions to checks for specified sanitizers">;
+def fsanitize_add_pseudo_functions : Flag<["-"], "fsanitize-add-pseudo-functions">, Group<f_clang_Group>,
+ Alias<fsanitize_add_pseudo_functions_EQ>, AliasArgs<["all"]>,
+ HelpText<"Allow compiler to add pseudo-functions to checks for all sanitizers">;
+def fno_sanitize_add_pseudo_functions : Flag<["-"], "fno-sanitize-add-pseudo-functions">, Group<f_clang_Group>,
+ Alias<fno_sanitize_add_pseudo_functions_EQ>, AliasArgs<["all"]>,
+ Visibility<[ClangOption, CLOption]>,
+ HelpText<"Do not allow compiler to add pseudo-functions to checks for any sanitizers">;
def fsanitize_undefined_trap_on_error
: Flag<["-"], "fsanitize-undefined-trap-on-error">, Group<f_clang_Group>,
Alias<fsanitize_trap_EQ>, AliasArgs<["undefined"]>;
diff --git a/clang/include/clang/Driver/SanitizerArgs.h b/clang/include/clang/Driver/SanitizerArgs.h
index 528e3b400f3dc..1c11706639aba 100644
--- a/clang/include/clang/Driver/SanitizerArgs.h
+++ b/clang/include/clang/Driver/SanitizerArgs.h
@@ -27,6 +27,7 @@ class SanitizerArgs {
SanitizerSet TrapSanitizers;
SanitizerSet MergeHandlers;
SanitizerMaskCutoffs SkipHotCutoffs;
+ SanitizerSet AddPseudoFunctions;
std::vector<std::string> UserIgnorelistFiles;
std::vector<std::string> SystemIgnorelistFiles;
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 2e01adc51fdf0..4ea41662af296 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1228,7 +1228,7 @@ void CodeGenFunction::EmitBoundsCheckImpl(const Expr *E, llvm::Value *Bound,
SanitizerScope SanScope(this);
llvm::DILocation *CheckDI = Builder.getCurrentDebugLocation();
- if (ClArrayBoundsPseudoFn && CheckDI) {
+ if ((ClArrayBoundsPseudoFn || CGM.getCodeGenOpts().SanitizeAddPseudoFunctions.has(SanitizerKind::SO_ArrayBounds)) && CheckDI) {
CheckDI = getDebugInfo()->CreateSyntheticInlineAt(
Builder.getCurrentDebugLocation(), "__ubsan_check_array_bounds");
}
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index ff08bffdbde1f..fd456ea0674af 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -76,6 +76,7 @@ static const SanitizerMask MergeDefault =
SanitizerKind::Undefined | SanitizerKind::Vptr;
static const SanitizerMask TrappingDefault =
SanitizerKind::CFI | SanitizerKind::LocalBounds;
+static const SanitizerMask AddPseudoFunctionsDefault;
static const SanitizerMask CFIClasses =
SanitizerKind::CFIVCall | SanitizerKind::CFINVCall |
SanitizerKind::CFIMFCall | SanitizerKind::CFIDerivedCast |
@@ -738,6 +739,13 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
// Parse -fno-sanitize-top-hot flags
SkipHotCutoffs = parseSanitizeSkipHotCutoffArgs(D, Args, DiagnoseErrors);
+ // Parse -f(no-)?sanitize-add-pseudo-functions flags
+ SanitizerMask AddPseudoFunctionsKinds =
+ parseSanitizeArgs(D, Args, DiagnoseErrors, AddPseudoFunctionsDefault, {}, {},
+ options::OPT_fsanitize_add_pseudo_functions_EQ,
+ options::OPT_fno_sanitize_add_pseudo_functions_EQ);
+ AddPseudoFunctionsKinds &= Kinds;
+
// Setup ignorelist files.
// Add default ignorelist from resource directory for activated sanitizers,
// and validate special case lists format.
@@ -1157,6 +1165,8 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
MergeHandlers.Mask |= MergeKinds;
+ AddPseudoFunctions.Mask |= AddPseudoFunctionsKinds;
+
// Zero out SkipHotCutoffs for unused sanitizers
SkipHotCutoffs.clear(~Sanitizers.Mask);
}
@@ -1335,6 +1345,10 @@ void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
CmdArgs.push_back(
Args.MakeArgString("-fsanitize-skip-hot-cutoff=" + SkipHotCutoffsStr));
+ if (!AddPseudoFunctions.empty())
+ CmdArgs.push_back(
+ Args.MakeArgString("-fsanitize-add-pseudo-functions=" + toString(AddPseudoFunctions)));
+
addSpecialCaseListOpt(Args, CmdArgs,
"-fsanitize-ignorelist=", UserIgnorelistFiles);
addSpecialCaseListOpt(Args, CmdArgs,
@@ -1518,7 +1532,9 @@ SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
A->getOption().matches(options::OPT_fno_sanitize_trap_EQ) ||
A->getOption().matches(options::OPT_fsanitize_merge_handlers_EQ) ||
- A->getOption().matches(options::OPT_fno_sanitize_merge_handlers_EQ)) &&
+ A->getOption().matches(options::OPT_fno_sanitize_merge_handlers_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_add_pseudo_functions_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_add_pseudo_functions_EQ)) &&
"Invalid argument in parseArgValues!");
SanitizerMask Kinds;
for (int i = 0, n = A->getNumValues(); i != n; ++i) {
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c7d11e6027ccf..d79b0546d41ce 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1838,6 +1838,10 @@ void CompilerInvocationBase::GenerateCodeGenArgs(const CodeGenOptions &Opts,
for (std::string Sanitizer : Values)
GenerateArg(Consumer, OPT_fsanitize_skip_hot_cutoff_EQ, Sanitizer);
+ for (StringRef Sanitizer :
+ serializeSanitizerKinds(Opts.SanitizeAddPseudoFunctions))
+ GenerateArg(Consumer, OPT_fsanitize_add_pseudo_functions_EQ, Sanitizer);
+
if (!Opts.EmitVersionIdentMetadata)
GenerateArg(Consumer, OPT_Qn);
@@ -2332,6 +2336,10 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
"-fsanitize-skip-hot-cutoff=",
Args.getAllArgValues(OPT_fsanitize_skip_hot_cutoff_EQ), Diags);
+ parseSanitizerKinds("-fsanitize-add-pseudo-functions=",
+ Args.getAllArgValues(OPT_fsanitize_add_pseudo_functions_EQ),
+ Diags, Opts.SanitizeAddPseudoFunctions);
+
Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
if (!LangOpts->CUDAIsDevice)
diff --git a/clang/test/CodeGen/bounds-checking-debuginfo.c b/clang/test/CodeGen/bounds-checking-debuginfo.c
index 4f5ba2b76eeeb..f31a40d86dac4 100644
--- a/clang/test/CodeGen/bounds-checking-debuginfo.c
+++ b/clang/test/CodeGen/bounds-checking-debuginfo.c
@@ -1,7 +1,7 @@
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
-// RUN: %clang_cc1 -mllvm -array-bounds-pseudofn -emit-llvm -fdebug-prefix-map=%S/= -fno-ident -fdebug-compilation-dir=%S -fsanitize=array-bounds -fsanitize-trap=array-bounds -triple x86_64 -debug-info-kind=limited %s -o - | FileCheck --check-prefix=CHECK-TRAP %s
-// RUN: %clang_cc1 -mllvm -array-bounds-pseudofn -emit-llvm -fdebug-prefix-map=%S/= -fno-ident -fdebug-compilation-dir=%S -fsanitize=array-bounds -triple x86_64 -debug-info-kind=limited %s -o - | FileCheck --check-prefix=CHECK-NOTRAP %s
+// RUN: %clang_cc1 -emit-llvm -fdebug-prefix-map=%S/= -fno-ident -fdebug-compilation-dir=%S -fsanitize=array-bounds -fsanitize-trap=array-bounds -fsanitize-add-pseudo-functions=array-bounds -triple x86_64 -debug-info-kind=limited %s -o - | FileCheck --check-prefix=CHECK-TRAP %s
+// RUN: %clang_cc1 -emit-llvm -fdebug-prefix-map=%S/= -fno-ident -fdebug-compilation-dir=%S -fsanitize=array-bounds -fsanitize-add-pseudo-functions=array-bounds -triple x86_64 -debug-info-kind=limited %s -o - | FileCheck --check-prefix=CHECK-NOTRAP %s
int f();
void d(double*);
diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index eb72140fb1315..ca58d4a50bc79 100644
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -1,3 +1,5 @@
+// * Test -fsanitize-trap */
+
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-TRAP
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-trap=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-TRAP2
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-undefined-trap-on-error %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-TRAP
@@ -9,6 +11,9 @@
// CHECK-UNDEFINED-TRAP: "-fsanitize-trap=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,function,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,return,returns-nonnull-attribute,shift-base,shift-exponent,signed-integer-overflow,unreachable,vla-bound"
// CHECK-UNDEFINED-TRAP2: "-fsanitize-trap=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,function,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,return,returns-nonnull-attribute,shift-base,shift-exponent,unreachable,vla-bound"
+
+// * Test -fsanitize-merge *
+
// The trailing -fsanitize-merge takes precedence
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-MERGE
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-merge %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-MERGE
@@ -62,6 +67,59 @@
// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-merge=signed-integer-overflow -fno-sanitize-merge=undefined -fsanitize-merge=alignment,null %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-MERGE5
// CHECK-UNDEFINED-MERGE5: "-fsanitize-merge=alignment,null"
+
+// * Test -fsanitize-add-pseudo-functions *
+
+// The trailing -fsanitize-add-pseudo-functions takes precedence
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=undefined -fsanitize-add-pseudo-functions %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=undefined -fsanitize-add-pseudo-functions=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow -fsanitize-add-pseudo-functions %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=bool -fsanitize-add-pseudo-functions=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined -fsanitize-add-pseudo-functions=bool %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO
+// CHECK-UNDEFINED-PSEUDO: "-fsanitize-add-pseudo-functions=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,function,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,return,returns-nonnull-attribute,shift-base,shift-exponent,signed-integer-overflow,unreachable,vla-bound"
+
+// The trailing arguments (-fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=signed-integer-overflow) take precedence
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=signed-integer-overflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO2
+// CHECK-UNDEFINED-PSEUDO2: "-fsanitize-add-pseudo-functions=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,function,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,return,returns-nonnull-attribute,shift-base,shift-exponent,unreachable,vla-bound"
+
+// The trailing -fno-sanitize-add-pseudo-functions takes precedence
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=undefined %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=bool %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=bool %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=undefined %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=undefined %s -### 2>&1 | not FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO3
+// CHECK-UNDEFINED-PSEUDO3: "-fsanitize-add-pseudo-functions"
+
+// The trailing arguments (-fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=alignment,null) take precedence
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=alignment,null %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO4
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=alignment,null %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO4
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions -fno-sanitize-add-pseudo-functions=alignment,null %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UNDEFINED-PSEUDO4
+// RUN: %clang --target=x86_64-linux-gnu -fsanitize=undefined -fsanitize-trap=undefined -fno-sanitize-add-pseudo-functions -fsanitize-add-pseudo-functions=undefined -fno-sanitize-add-pseudo-functions=alignment,null %s -### 2>&1 | FileChe...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/138577
More information about the cfe-commits
mailing list