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| author | H.J. Lu <hjl.tools@gmail.com> | 2025-08-12 05:19:24 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2025-08-12 18:01:47 -0700 |
| commit | 9e30860f8c77309c9f74742fe8866d2ca0d0fe7a (patch) | |
| tree | 8e3c56a7d0d67b594fbfbbc76b574e66e561d761 | |
| parent | 28c0d45201a0a4a0f7dd285b1992039cd6af015f (diff) | |
| download | gcc-9e30860f8c77309c9f74742fe8866d2ca0d0fe7a.zip gcc-9e30860f8c77309c9f74742fe8866d2ca0d0fe7a.tar.gz gcc-9e30860f8c77309c9f74742fe8866d2ca0d0fe7a.tar.bz2 | |
x86: Convert integer constant to mode of move
For
(set (reg/v:DI 106 [ k ])
(const_int 3000000000 [0xb2d05e00]))
...
(set (reg:V4SI 115 [ _13 ])
(vec_duplicate:V4SI (subreg:SI (reg/v:DI 106 [ k ]) 0)))
...
(set (reg:V2SI 118 [ _9 ])
(vec_duplicate:V2SI (subreg:SI (reg/v:DI 106 [ k ]) 0)))
we should generate
(set (reg:SI 125)
(const_int -1294967296 [0xffffffffb2d05e00]))
(set (reg:V4SI 124)
(vec_duplicate:V4SI (reg:VSI 125))
...
(set (reg:V4SI 115 [ _13 ])
(reg:V4SI 124)
...
(set (reg:V2SI 118 [ _9 ])
(subreg:V2SI (reg:V4SI 124))
by converting integer constant to mode of move.
gcc/
PR target/121497
* config/i386/i386-features.cc (ix86_broadcast_inner): Convert
integer constant to mode of move
gcc/testsuite/
PR target/121497
* gcc.target/i386/pr121497.c: New test.
Co-authored-by: Liu, Hongtao <hongtao.liu@intel.com>
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
| -rw-r--r-- | gcc/config/i386/i386-features.cc | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr121497.c | 18 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gcc/config/i386/i386-features.cc b/gcc/config/i386/i386-features.cc index 9941e61..b4aa5fa 100644 --- a/gcc/config/i386/i386-features.cc +++ b/gcc/config/i386/i386-features.cc @@ -3639,6 +3639,8 @@ ix86_broadcast_inner (rtx op, machine_mode mode, Set *INSN_P to nullptr and return SET_SRC if SET_SRC is an integer constant. */ op = src; + if (mode != GET_MODE (reg)) + op = gen_int_mode (INTVAL (src), mode); *insn_p = nullptr; } else diff --git a/gcc/testsuite/gcc.target/i386/pr121497.c b/gcc/testsuite/gcc.target/i386/pr121497.c new file mode 100644 index 0000000..ce55f95 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr121497.c @@ -0,0 +1,18 @@ +/* { dg-do compile } */ +/* { dg-options "-O3 -msse2 -w" } */ + +extern void a(int *); +int q; +void b(int c, int d, int e, int f, int g, int h) { + int t[] = {c, d, e, f, g, h}; + a(t); +} +int main() { + int k[2], i = 0, *p(); + if (q) { + for (; (int)p + i < 2; i++) + k[i] = -1294967296; + b(k[0] + 7, k[0] + 9, k[0] + 6, k[0] + 9, k[0] + 9, k[0] + 6); + } + return 0; +} |