https://gcc.gnu.org/g:72a445d4792bef6ac394f70a49efc227c20f57f6
commit 72a445d4792bef6ac394f70a49efc227c20f57f6
Author: Roger Sayle <ro...@nextmovesoftware.com>
Date: Sun May 19 09:49:45 2024 +0100
nvptx: Correct pattern for popcountdi2 insn in nvptx.md.
The result of a POPCOUNT operation in RTL should have the same mode
as its operand. This corrects the specification of popcount in
the nvptx backend, splitting the current generic define_insn into
two, one for popcountsi2 and the other for popcountdi2 (the latter
with an explicit truncate).
2024-05-19 Roger Sayle <ro...@nextmovesoftware.com>
gcc/ChangeLog
* config/nvptx/nvptx.md (popcount<mode>2): Split into...
(popcountsi2): define_insn handling SImode popcount.
(popcountdi2): define_insn handling DImode popcount, with an
explicit truncate:SI to produce an SImode result.
(cherry picked from commit 1676ef6e91b902f592270e4bcf10b4fc342e200d)
Diff:
---
gcc/ChangeLog.omp | 7 +++++++
gcc/config/nvptx/nvptx.md | 13 ++++++++++---
2 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/gcc/ChangeLog.omp b/gcc/ChangeLog.omp
index 11d36c3c6fc..ac4a30e81c8 100644
--- a/gcc/ChangeLog.omp
+++ b/gcc/ChangeLog.omp
@@ -1,3 +1,10 @@
+2024-05-19 Roger Sayle <ro...@nextmovesoftware.com>
+
+ * config/nvptx/nvptx.md (popcount<mode>2): Split into...
+ (popcountsi2): define_insn handling SImode popcount.
+ (popcountdi2): define_insn handling DImode popcount, with an
+ explicit truncate:SI to produce an SImode result.
+
2024-04-16 Andrew Pinski <quic_apin...@quicinc.com>
PR middle-end/23872
diff --git a/gcc/config/nvptx/nvptx.md b/gcc/config/nvptx/nvptx.md
index 872f4341899..18033bef699 100644
--- a/gcc/config/nvptx/nvptx.md
+++ b/gcc/config/nvptx/nvptx.md
@@ -669,11 +669,18 @@
DONE;
})
-(define_insn "popcount<mode>2"
+(define_insn "popcountsi2"
[(set (match_operand:SI 0 "nvptx_register_operand" "=R")
- (popcount:SI (match_operand:SDIM 1 "nvptx_register_operand" "R")))]
+ (popcount:SI (match_operand:SI 1 "nvptx_register_operand" "R")))]
""
- "%.\\tpopc.b%T1\\t%0, %1;")
+ "%.\\tpopc.b32\\t%0, %1;")
+
+(define_insn "popcountdi2"
+ [(set (match_operand:SI 0 "nvptx_register_operand" "=R")
+ (truncate:SI
+ (popcount:DI (match_operand:DI 1 "nvptx_register_operand" "R"))))]
+ ""
+ "%.\\tpopc.b64\\t%0, %1;")
;; Multiplication variants
