Under slim LTO (-flto without fat objects) a compile-only
check-function-bodies test emits only LTO bytecode in its .s file and,
because it never links, produces no LTRANS output, so the check finds
nothing to scan. Unlike scan-assembler*, check-function-bodies had no
required-options hook to force -ffat-lto-objects.
Register a required-options hook for check-function-bodies so that LTO
runs add -ffat-lto-objects, yielding a non-empty .s to scan. With fat
objects a compile-only test no longer produces an LTRANS file, so scan
the .ltrans0.ltrans.s output only when it actually exists and otherwise
fall back to the .s file.
gcc/testsuite/ChangeLog:
* lib/scanasm.exp (check-function-bodies): Scan the LTRANS output
only when it exists, otherwise fall back to the .s file. Set the
required options for check-function-bodies.
---
gcc/testsuite/lib/scanasm.exp | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/gcc/testsuite/lib/scanasm.exp b/gcc/testsuite/lib/scanasm.exp
index 897ce76eae5..9291735386a 100644
--- a/gcc/testsuite/lib/scanasm.exp
+++ b/gcc/testsuite/lib/scanasm.exp
@@ -1219,10 +1219,16 @@ proc check-function-bodies { args } {
global srcdir
set input_filename "$srcdir/$filename"
set output_filename "[file rootname [file tail $filename]]"
+ # With slim LTO the regular .s holds no assembly, so a link test reads
+ # the post-LTO LTRANS output instead. A compile-only test produces no
+ # LTRANS file; check-function-bodies' required-options force
+ # -ffat-lto-objects for it, so fall back to the (now non-empty) .s.
+ set lto_filename "$output_filename.ltrans0.ltrans.s"
if { [string match "* -flto *" " ${flags} "]
&& ![string match "* -fno-use-linker-plugin *" " ${flags} "]
- && ![string match "* -ffat-lto-objects *" " ${flags} "] } {
- append output_filename ".ltrans0.ltrans.s"
+ && ![string match "* -ffat-lto-objects *" " ${flags} "]
+ && [file exists $lto_filename] } {
+ set output_filename $lto_filename
} else {
append output_filename ".s"
}
@@ -1321,3 +1327,5 @@ proc check-function-bodies { args } {
error "check-function-bodies: no matches found"
}
}
+
+set_required_options_for check-function-bodies
--
2.52.0
