From caba9473d7381b3ba3f5c9415027f115ac4f2779 Mon Sep 17 00:00:00 2001 From: Jeff Law Date: Thu, 1 Oct 1992 11:05:02 -0600 Subject: [PATCH] pa.h (LEGITIMIZE_ADDRESS, [...]): Emit a sequence which will cause "addil" instructions to be emitted instead of... * pa.h (LEGITIMIZE_ADDRESS, SYMBOL_REF case): Emit a sequence which will cause "addil" instructions to be emitted instead of "ldil; add" sequences. * pa.h (TARGET_KERNEL): New switch "-mkernel" which forces gcc to avoid "ldil; add" sequences with %r27 and instead generate "addil" sequences. This avoids a HPUX linker bug when compiling kernels. From-SVN: r2297 --- gcc/config/pa/pa.h | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h index 25f8fe56885..9a68aaa8b87 100644 --- a/gcc/config/pa/pa.h +++ b/gcc/config/pa/pa.h @@ -99,6 +99,13 @@ extern int target_flags; #define TARGET_NO_BSS (target_flags & 2) +/* Force gcc to only use instructions which are safe when compiling kernels. + Specifically, avoid using add instructions with dp (r27) as an argument. + Use addil instructions instead. Doing so avoids a nasty bug in the + HPUX linker. When HP fixes their linker take this option out. */ + +#define TARGET_KERNEL (target_flags & 4) + /* Macro to define tables used to set the flags. This is a list in braces of pairs in braces, each pair being { "NAME", VALUE } @@ -111,6 +118,7 @@ extern int target_flags; {"pa-risc-1-0", -1}, \ {"pa-risc-1-1", 1}, \ {"no-bss", 2}, \ + {"kernel", 4}, \ { "", TARGET_DEFAULT}} #define TARGET_DEFAULT 0 @@ -1197,13 +1205,13 @@ extern union tree_node *current_function_decl; (X) = gen_rtx (LO_SUM, Pmode, \ copy_to_mode_reg (Pmode, gen_rtx (HIGH, Pmode, X)), X); \ else if (GET_CODE (X) == SYMBOL_REF) \ - (X) = gen_rtx (LO_SUM, Pmode, \ - copy_to_mode_reg (Pmode, \ - gen_rtx (PLUS, Pmode, \ - copy_to_mode_reg (Pmode,\ - gen_rtx (HIGH, Pmode, X)),\ - gen_rtx (REG, Pmode, 27))),\ - X); \ + { \ + rtx temp2 = gen_reg_rtx (Pmode); \ + emit_insn (gen_rtx (SET, VOIDmode, temp2, \ + gen_rtx (PLUS, Pmode, gen_rtx (REG, Pmode, 27),\ + gen_rtx (HIGH, Pmode, X)))); \ + (X) = gen_rtx (LO_SUM, Pmode, temp2, X); \ + } \ if (memory_address_p (MODE, X)) \ goto WIN;} -- 2.30.2