afd0e6d06b
musttail is not often possible to be generated on PPC targets as when calling to a function defined in another module, PPC needs to restore the TOC pointer. To restore the TOC pointer, compiler needs to emit a nop after the call to let linker generate codes to restore TOC pointer. Tail call cannot generate expected call sequence for this case. To avoid the crash inside the compiler backend, a diagnosis is added in the frontend. Fixes #63214
13 lines
455 B
C
13 lines
455 B
C
// RUN: %clang_cc1 %s -triple powerpc64le-unknown-linux-gnu -o /dev/null -emit-llvm -verify
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// RUN: %clang_cc1 %s -triple powerpc64-unknown-linux-gnu -o /dev/null -emit-llvm -verify
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int func2(int i);
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int external_call2(int i) {
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// expected-error@+1 {{'musttail' attribute for this call is impossible because external calls can not be tail called on PPC}}
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[[clang::musttail]] return func2(i);
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}
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__attribute__((weak)) int func2(int i) {
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return 0;
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}
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