527b0f8c74
gcc/config/{i386,s390} support -mnop-mcount. We currently only support
-mnop-mcount for SystemZ. The function attribute "mnop-mcount" is
ignored on other targets.
gcc/config/{i386,s390} support -mfentry. We currently only support
-mfentry for X86 and SystemZ. TargetOpcode::FENTRY_CALL is not handled
on other targets.
% clang -target aarch64 -pg -mfentry a.c -c
fatal error: error in backend: Not supported instr: <MCInst 21>
-mfentry, -mrecord-mcount, and -mnop-mcount were invented for Linux
ftrace. Linux uses $(call cc-option-yn,-mrecord-mcount) to detect if the
specific feature is available. Reject unsupported features so that Linux
build system will not wrongly consider them available and cause
build/runtime failures.
Note, GCC has stricter checks that we do not implement, e.g. -fpic/-fpie
-fnop-mcount is not allowed on x86, -fpic/-fpie -mfentry is not allowed
on x86-32.
13 lines
654 B
C
13 lines
654 B
C
// RUN: %clang -target s390x -c -### %s -mnop-mcount -mrecord-mcount 2>&1 | FileCheck %s
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// CHECK: "-mnop-mcount"
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// CHECK: "-mrecord-mcount"
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// RUN: %clang -target x86_64 -c -### %s -mnop-mcount -mrecord-mcount 2>&1 | FileCheck --check-prefix=ERR1 %s
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// RUN: %clang -target aarch64 -c -### %s -mnop-mcount -mrecord-mcount 2>&1 | FileCheck --check-prefix=ERR2 %s
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// ERR1: error: unsupported option '-mnop-mcount' for target 'x86_64'
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// ERR1: error: unsupported option '-mrecord-mcount' for target 'x86_64'
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// ERR2: error: unsupported option '-mnop-mcount' for target 'aarch64'
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// ERR2: error: unsupported option '-mrecord-mcount' for target 'aarch64'
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