https://gcc.gnu.org/g:9a1efd1ee2509abb93878bd911d8c07143b10e33
commit r12-10920-g9a1efd1ee2509abb93878bd911d8c07143b10e33
Author: Uros Bizjak <ubiz...@gmail.com>
Date: Mon Jan 20 16:19:43 2025 +0100
i386: Disable SImode/DImode moves from/to mask regs without avx512bw
[PR118067]
SImode and DImode moves from/to mask registers are valid only with AVX512BW,
so mark relevant alternatives in *movsi_internal and *movdi_internal as
such.
PR target/118067
gcc/ChangeLog:
* config/i386/i386.md (*movdi_internal):
Disable alternatives from/to mask registers without AVX512BW.
(*movsi_internal): Ditto.
Diff:
---
gcc/config/i386/i386.md | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 4142d7fec4d3..911edddaec90 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -2251,12 +2251,16 @@
[(set (attr "isa")
(cond [(eq_attr "alternative" "0,1,17,18")
(const_string "nox64")
- (eq_attr "alternative" "2,3,4,5,10,11,23,25")
+ (eq_attr "alternative" "2,3,4,5,10,11")
(const_string "x64")
(eq_attr "alternative" "19,20")
(const_string "x64_sse2")
(eq_attr "alternative" "21,22")
(const_string "sse2")
+ (eq_attr "alternative" "23,25")
+ (const_string "x64_avx512bw")
+ (eq_attr "alternative" "24,26,27")
+ (const_string "avx512bw")
]
(const_string "*")))
(set (attr "type")
@@ -2467,6 +2471,8 @@
[(set (attr "isa")
(cond [(eq_attr "alternative" "12,13")
(const_string "sse2")
+ (eq_attr "alternative" "14,15,16,17")
+ (const_string "avx512bw")
]
(const_string "*")))
(set (attr "type")
