https://gcc.gnu.org/bugzilla/show_bug.cgi?id=989
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Michael Meissner <meiss...@gcc.gnu.org>: https://gcc.gnu.org/g:078d2c5efbc6d372411fa2b8f07efb50e23f70b9 commit r8-10923-g078d2c5efbc6d372411fa2b8f07efb50e23f70b9 Author: Michael Meissner <meiss...@linux.ibm.com> Date: Mon Apr 26 18:26:16 2021 -0400 [PATCH] Backport fix for PR target/989r2 The test in the PowerPC 32-bit trampoline support is backwards. It aborts if the trampoline size is greater than the expected size. It should abort when the trampoline size is less than the expected size. I fixed the test so the operands are reversed. I then folded the load immediate into the compare instruction. I verified this by creating a 32-bit trampoline program and manually changing the size of the trampoline to be 48 instead of 40. The program aborted with the larger size. I updated this code and ran the test again and it passed. I added a test case that runs on PowerPC 32-bit Linux systems and it calls the __trampoline_setup function with a larger buffer size than the compiler uses. The test is not run on 64-bit systems, since the function __trampoline_setup is not called. I also limited the test to just Linux systems, in case trampolines are handled differently in other systems. libgcc/ 2021-04-26 Michael Meissner <meiss...@linux.ibm.com> PR target/98952 * config/rs6000/tramp.S (__trampoline_setup, elfv1 #ifdef): Fix trampoline size comparison in 32-bit by reversing test and combining load immediate with compare. Fix backported from trunk change on 4/23, 886b6c1e8af502b69e3f318b9830b73b88215878. (__trampoline_setup, elfv2 #ifdef): Fix trampoline size comparison in 32-bit by reversing test and combining load immediate with compare. gcc/testsuite/ 2021-04-26 Michael Meissner <meiss...@linux.ibm.com> PR target/98952 * gcc.target/powerpc/pr98952.c: New test. Test backported from trunk change on 4/23, 886b6c1e8af502b69e3f318b9830b73b88215878.
