e81b42fde9
Although this is nominally a -W option, we actually handle it in the driver exactly as an f-group flag that's translated directly to -mllvm. That means f_Group (and unintuitively, not W_Group) has the semantics we want to make it behave like a standard warning flag: no automatic forwarding, no warning for link invocations and compile-only. Silences diagnostics like: [691/1545] Linking CXX executable bin/llvm-diff clang-3.5: warning: argument unused during compilation: '-Wframe-larger-than=2048' (Hopefully we can move towards handling these in the frontend but that'll require some infrastructure work.) llvm-svn: 212670
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
// REQUIRES: x86-registered-target
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// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Xclang -verify -o /dev/null -c %s
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// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Xclang -verify -o /dev/null -c %s -DIS_SYSHEADER
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// Test that:
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// * The driver passes the option through to the backend.
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// * The frontend diagnostic handler 'demangles' and resolves the correct function definition.
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// Test that link invocations don't emit an "argument unused during compilation" diagnostic.
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// RUN: touch %t.o
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// RUN: %clang -Werror -Wframe-larger-than=0 %t.o -### 2>&1 | not grep ' error: '
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// TODO: Support rich backend diagnostics for Objective-C methods.
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// Backend diagnostics aren't suppressed in system headers because such results
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// are significant and actionable.
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#ifdef IS_HEADER
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#ifdef IS_SYSHEADER
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#pragma clang system_header
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#endif
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extern void doIt(char *);
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void frameSizeWarning(int, int) {}
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void frameSizeWarning();
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void frameSizeWarning() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeWarning'}}
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char buffer[80];
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doIt(buffer);
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}
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void frameSizeWarning();
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void frameSizeWarning(int) {}
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wframe-larger-than="
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void frameSizeWarningIgnored() {
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char buffer[80];
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doIt(buffer);
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}
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#pragma GCC diagnostic pop
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#pragma GCC diagnostic push
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#ifndef IS_SYSHEADER
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// expected-warning@+2 {{unknown warning group '-Wframe-larger-than'}}
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#endif
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#pragma GCC diagnostic ignored "-Wframe-larger-than"
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#pragma GCC diagnostic pop
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void frameSizeLocalClassWarning() {
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struct S {
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S() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeLocalClassWarning()::S::S'}}
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char buffer[80];
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doIt(buffer);
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}
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};
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S();
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}
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void frameSizeLambdaWarning() {
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auto fn =
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[]() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in lambda expression}}
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char buffer[80];
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doIt(buffer);
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};
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fn();
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}
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void frameSizeBlocksWarning() {
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auto fn =
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^() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in block literal}}
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char buffer[80];
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doIt(buffer);
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};
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fn();
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}
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#else
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#define IS_HEADER
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#include __FILE__
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#endif
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