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From: Matthew Malcomson <matmal01@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/vendors/ARM/heads/morello)] aarch64: Fix CADImode case of hard_regno_mode_ok Date: Mon, 14 Mar 2022 10:34:21 +0000 (GMT) [thread overview] Message-ID: <20220314103421.8CFDB3857829@sourceware.org> (raw) https://gcc.gnu.org/g:32ea15f06b16599bf16f737cff30ad201ca3eb1f commit 32ea15f06b16599bf16f737cff30ad201ca3eb1f Author: Alex Coplan <alex.coplan@arm.com> Date: Fri Feb 25 16:20:57 2022 +0000 aarch64: Fix CADImode case of hard_regno_mode_ok This patch allows us to compile some code from newlib that was previously being incorrectly rejected. Prior to this patch, we would reject the stack pointer (CSP) in aarch64_hard_regno_mode_ok with mode = CADImode. This changes the CADImode case to use aarch64_regno_ok_for_base_p, which further allows the stack pointer, as well as the fake frame and argument pointers. gcc/ChangeLog: * config/aarch64/aarch64.c (aarch64_hard_regno_mode_ok): Adjust CADImode case to use aarch64_regno_ok_for_base_p. gcc/testsuite/ChangeLog: * gcc.target/aarch64/morello/access-csp.c: New test. Diff: --- gcc/config/aarch64/aarch64.c | 2 +- gcc/testsuite/gcc.target/aarch64/morello/access-csp.c | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index cf18d63dc30..d3a9017ab3e 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -2650,7 +2650,7 @@ static bool aarch64_hard_regno_mode_ok (unsigned regno, machine_mode mode) { if (mode == CADImode) - return GP_REGNUM_P (regno); + return aarch64_regno_ok_for_base_p (regno, true); if (GET_MODE_CLASS (mode) == MODE_CC) return regno == CC_REGNUM; diff --git a/gcc/testsuite/gcc.target/aarch64/morello/access-csp.c b/gcc/testsuite/gcc.target/aarch64/morello/access-csp.c new file mode 100644 index 00000000000..fc2c4b5ed00 --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/morello/access-csp.c @@ -0,0 +1,3 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-std=gnu99" } */ +register char * stack_ptr asm ("sp");
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