http://llvm.org/bugs/show_bug.cgi?id=19749
Bug ID: 19749
Summary: Clang integrated assembler doesn't accept asm macro
defined in one asm directive and used in another
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Integrated assembler refuses to accept code where an asm macro is defined
outside a function but the use is in a different asm block. This example also
demonstrates a workaround, on case others stumble across this bug too.
$ cat foobar.c
#if defined(MACRO_OUTSIDE)
asm(
".macro RETURN cond=\n\t"
"bx\\cond lr\n\t"
".endm\n\t"
);
#endif
char* __attribute__((naked))
foo(char* bar)
{
asm (
#if !defined(MACRO_OUTSIDE)
".macro RETURN cond=\n\t"
"bx\\cond lr\n\t"
".endm\n\t"
#endif
"RETURN\n"
);
}
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c -fintegrated-as
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c
-fno-integrated-as
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c
-fno-integrated-as -DMACRO_OUTSIDE
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c -fintegrated-as
-DMACRO_OUTSIDE
foobar.c:18:5: error: invalid instruction
"RETURN\n"
^
<inline asm>:1:2: note: instantiated into assembly here
RETURN
^~~~~~
1 error generated.
[15:01:37] ✘ jroelofs@build1-lucid-cs arm-none-eabi-lite$
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