[Bug target/88656] [7/8/9/10 Regression] lr clobbered by thumb prologue before __builtin_return_address(0) reads from it
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88656
gerd at egidy dot de changed:
What|Removed |Added
CC||gerd at egidy dot de
--- Comment #2 from gerd at egidy dot de ---
Could it be that this is a duplicate of bug 88167?
I compiled a gcc 7.4.0 patched with the fix for 88167 and now get this result:
push{r4, lr}
mov r3, r8
mov r4, r9
push{r3, r4}
mov r0, lr
The patch for bug 88167 seems to be just in trunk for now. As the problem is a
regression in all releases till gcc 7 I'd prefer if it could be backported into
the corresponding branches.
[Bug target/88656] [7/8/9/10 Regression] lr clobbered by thumb prologue before __builtin_return_address(0) reads from it
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88656 --- Comment #4 from gerd at egidy dot de --- (In reply to Richard Earnshaw from comment #3) > A regression is not a bug that applies in all previous releases. A > regression is where something worked in some previous releases but does not > work now. using __builtin_return_address(0) as described in the bug report worked in gcc 5.4.0 and before. To be more specific, it worked before the fix for bug 77933 was incorporated. So to me this is a regression.
[Bug target/88656] [7/8/9/10 Regression] lr clobbered by thumb prologue before __builtin_return_address(0) reads from it
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88656 --- Comment #6 from gerd at egidy dot de --- (In reply to Richard Earnshaw from comment #5) > then please update the known-to-work field accordingly. It seems I'm missing the rights to do so, could someone with the rights please do that.
