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| author | Alex Coplan <alex.coplan@arm.com> | 2023-11-02 22:53:44 +0000 |
|---|---|---|
| committer | Alex Coplan <alex.coplan@arm.com> | 2023-12-15 19:59:59 +0000 |
| commit | 94415eb7a464e855c37ab01ab300fa5e87e4c4a3 (patch) | |
| tree | fdadf6ae295f5fd9d9c7220a04b59b7856f48ac7 /gcc | |
| parent | 0bd6f7a7496a78832624713f3df64ad17fa0f841 (diff) | |
| download | gcc-94415eb7a464e855c37ab01ab300fa5e87e4c4a3.zip gcc-94415eb7a464e855c37ab01ab300fa5e87e4c4a3.tar.gz gcc-94415eb7a464e855c37ab01ab300fa5e87e4c4a3.tar.bz2 | |
aarch64: Fix up aarch64_print_operand xzr/wzr case
This adjusts aarch64_print_operand to recognize zero rtxes in modes other than
VOIDmode. This allows us to use xzr/wzr for zero vectors, for example.
We extract the test into a helper function, aarch64_const_zero_rtx_p, since this
predicate is needed by later patches.
gcc/ChangeLog:
* config/aarch64/aarch64-protos.h (aarch64_const_zero_rtx_p): New.
* config/aarch64/aarch64.cc (aarch64_const_zero_rtx_p): New.
Use it ...
(aarch64_print_operand): ... here. Recognize CONST0_RTXes in
modes other than VOIDmode.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/aarch64/aarch64-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.cc | 12 |
2 files changed, 11 insertions, 2 deletions
diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h index 88e5942..8d6ea73 100644 --- a/gcc/config/aarch64/aarch64-protos.h +++ b/gcc/config/aarch64/aarch64-protos.h @@ -774,6 +774,7 @@ bool aarch64_expand_cpymem (rtx *, bool); bool aarch64_expand_setmem (rtx *); bool aarch64_float_const_zero_rtx_p (rtx); bool aarch64_float_const_rtx_p (rtx); +bool aarch64_const_zero_rtx_p (rtx); bool aarch64_function_arg_regno_p (unsigned); bool aarch64_fusion_enabled_p (enum aarch64_fusion_pairs); bool aarch64_gen_cpymemqi (rtx *); diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc index 190608d..6d973b3 100644 --- a/gcc/config/aarch64/aarch64.cc +++ b/gcc/config/aarch64/aarch64.cc @@ -10851,6 +10851,15 @@ aarch64_float_const_zero_rtx_p (rtx x) return real_equal (CONST_DOUBLE_REAL_VALUE (x), &dconst0); } +/* Return true if X is any kind of constant zero rtx. */ + +bool +aarch64_const_zero_rtx_p (rtx x) +{ + return (x == CONST0_RTX (GET_MODE (x)) + || (CONST_DOUBLE_P (x) && aarch64_float_const_zero_rtx_p (x))); +} + /* Return TRUE if rtx X is immediate constant that fits in a single MOVI immediate operation. */ bool @@ -12054,8 +12063,7 @@ aarch64_print_operand (FILE *f, rtx x, int code) case 'w': case 'x': - if (x == const0_rtx - || (CONST_DOUBLE_P (x) && aarch64_float_const_zero_rtx_p (x))) + if (aarch64_const_zero_rtx_p (x)) { asm_fprintf (f, "%czr", code); break; |