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
21 lines
1.2 KiB
C
21 lines
1.2 KiB
C
// RUN: %clang_cc1 %s -triple powerpc64-ibm-aix-xcoff -o /dev/null -emit-llvm -verify=aix
|
|
// RUN: %clang_cc1 %s -triple powerpc-ibm-aix-xcoff -o /dev/null -emit-llvm -verify=aix
|
|
// RUN: %clang_cc1 %s -triple powerpc64-unknown-linux-gnu -o /dev/null -emit-llvm -verify=good
|
|
// RUN: %clang_cc1 %s -triple powerpc-unknown-linux-gnu -o /dev/null -emit-llvm -verify=good
|
|
// RUN: %clang_cc1 %s -triple powerpc64le-unknown-linux-gnu -o /dev/null -emit-llvm -verify=good
|
|
// RUN: %clang_cc1 %s -triple powerpc64le-unknown-linux-gnu -target-feature +pcrelative-memops -o /dev/null -emit-llvm -verify=good
|
|
// RUN: %clang_cc1 %s -triple powerpc64le-unknown-linux-gnu -target-feature +longcall -o /dev/null -emit-llvm -verify=longcall
|
|
// RUN: %clang_cc1 %s -triple powerpc64le-unknown-linux-gnu -target-feature +pcrelative-memops -target-feature +longcall -o /dev/null -emit-llvm -verify=good
|
|
|
|
int foo(int x) {
|
|
return x;
|
|
}
|
|
|
|
int bar(int x)
|
|
{
|
|
// good-no-diagnostics
|
|
// longcall-error@+2 {{'musttail' attribute for this call is impossible because long calls can not be tail called on PPC}}
|
|
// aix-error@+1 {{'musttail' attribute is not supported on AIX}}
|
|
[[clang::musttail]] return foo(1);
|
|
}
|