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| author | Jeff Law <law@gcc.gnu.org> | 1992-10-01 11:05:02 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1992-10-01 11:05:02 -0600 |
| commit | caba9473d7381b3ba3f5c9415027f115ac4f2779 (patch) | |
| tree | 511d2ee2a15a67dbbf12b8e4a7ced9ade9db6cfb /gcc | |
| parent | 2fbd8ac74e5d308cecbe27a0c3ce5a05f28770a0 (diff) | |
| download | gcc-caba9473d7381b3ba3f5c9415027f115ac4f2779.zip gcc-caba9473d7381b3ba3f5c9415027f115ac4f2779.tar.gz gcc-caba9473d7381b3ba3f5c9415027f115ac4f2779.tar.bz2 | |
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/pa/pa.h | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h index 25f8fe5..9a68aaa 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;} |