Since %ecx can't be used for both DRAP register and __builtin_eh_return,
we need to check if crtl->drap_reg uses %ecx before using %ecx for
__builtin_eh_return.
Testing on x86-64. OK for trunk if there are no regressions?
H.J.
---
PR target/70439
* config/i386/i386.c (ix86_expand_epilogue): Properly check
conflict between DRAP register and __builtin_eh_return.
---
gcc/config/i386/i386.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 1639704..aafe171 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -13463,8 +13463,9 @@ ix86_expand_epilogue (int style)
rtx sa = EH_RETURN_STACKADJ_RTX;
rtx_insn *insn;
- /* Stack align doesn't work with eh_return. */
- gcc_assert (!stack_realign_drap);
+ /* %ecx can't be used for both DRAP register and eh_return. */
+ gcc_assert (!crtl->drap_reg
+ || REGNO (crtl->drap_reg) != CX_REG);
/* Neither does regparm nested functions. */
gcc_assert (!ix86_static_chain_on_stack);
--
2.5.5
