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| author | Richard Kenner <kenner@gcc.gnu.org> | 1993-04-25 13:00:40 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1993-04-25 13:00:40 -0400 |
| commit | 31e4b1c0990daaa780524bf61f060049571f018b (patch) | |
| tree | 63c1bf13ac8e4d259e06c71c2f84d981af1f96fb /gcc | |
| parent | e09d75bd9717621c55282547bd4d9c8c1489a5bf (diff) | |
| download | gcc-31e4b1c0990daaa780524bf61f060049571f018b.zip gcc-31e4b1c0990daaa780524bf61f060049571f018b.tar.gz gcc-31e4b1c0990daaa780524bf61f060049571f018b.tar.bz2 | |
(make_decl_rtl): If a variable has an asm operand that refers to,
e.g., fp, make a distinct RTL for it.
From-SVN: r4215
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/varasm.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index 50b348f..16bb816 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -354,7 +354,16 @@ make_decl_rtl (decl, asmspec, top_level) error ("global register variable follows a function definition"); if (TREE_THIS_VOLATILE (decl)) warning ("volatile register variables don't work as you might wish"); - DECL_RTL (decl) = gen_rtx (REG, DECL_MODE (decl), reg_number); + + /* If the user specified one of the eliminables registers here, + e.g., FRAME_POINTER_REGNUM, we don't want to get this variable + confused with that register and be eliminated. Although this + usage is somewhat suspect, we nevertheless use the following + kludge to avoid setting DECL_RTL to frame_pointer_rtx. */ + + DECL_RTL (decl) + = gen_rtx (REG, DECL_MODE (decl), FIRST_PSEUDO_REGISTER); + REGNO (DECL_RTL (decl)) = reg_number; REG_USERVAR_P (DECL_RTL (decl)) = 1; if (top_level) |