The output templates for zero_extendhidi2 and zero_extendqidi2 could
lead to incorrect code generation when zero-extending one register into
another. This patch adds a new output template to the define_insns to
handle such cases and produce correct asm.
gcc/ChangeLog:
* config/bpf/bpf.md (zero_extendhidi2): Add new output template
for register-to-register extensions.
(zero_extendqidi2): Likewise.
---
gcc/config/bpf/bpf.md | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/gcc/config/bpf/bpf.md b/gcc/config/bpf/bpf.md
index 03830cc250e..c51add728ef 100644
--- a/gcc/config/bpf/bpf.md
+++ b/gcc/config/bpf/bpf.md
@@ -241,22 +241,24 @@
;; the ldx{bhwdw} instructions to load the values in registers.
(define_insn "zero_extendhidi2"
- [(set (match_operand:DI 0 "register_operand" "=r,r")
- (zero_extend:DI (match_operand:HI 1 "nonimmediate_operand" "r,m")))]
+ [(set (match_operand:DI 0 "register_operand" "=r,r,r")
+ (zero_extend:DI (match_operand:HI 1 "nonimmediate_operand" "0,r,m")))]
""
"@
and\t%0,0xffff
+ mov\t%0,%1\;and\t%0,0xffff
ldxh\t%0,%1"
- [(set_attr "type" "alu,ldx")])
+ [(set_attr "type" "alu,alu,ldx")])
(define_insn "zero_extendqidi2"
- [(set (match_operand:DI 0 "register_operand" "=r,r")
- (zero_extend:DI (match_operand:QI 1 "nonimmediate_operand" "r,m")))]
+ [(set (match_operand:DI 0 "register_operand" "=r,r,r")
+ (zero_extend:DI (match_operand:QI 1 "nonimmediate_operand" "0,r,m")))]
""
"@
and\t%0,0xff
+ mov\t%0,%1\;and\t%0,0xff
ldxb\t%0,%1"
- [(set_attr "type" "alu,ldx")])
+ [(set_attr "type" "alu,alu,ldx")])
(define_insn "zero_extendsidi2"
[(set (match_operand:DI 0 "register_operand" "=r,r")
--
2.33.0
