In arm_block_set_aligned_vect 8-bit constants are generated as zero-
extended const_ints, not sign-extended as required. Fix that.
Tamar tested the patch (see PR); no problems were found. Is this okay
for trunk?
Segher
2018-07-30 Segher Boessenkool <seg...@kernel.crashing.org>
PR target/86640
* config/arm/arm.c (arm_block_set_aligned_vect): Use gen_int_mode
instead of GEN_INT.
---
gcc/config/arm/arm.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index cf12ace..f5eece4 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -30046,7 +30046,6 @@ arm_block_set_aligned_vect (rtx dstbase,
rtx dst, addr, mem;
rtx val_vec, reg;
machine_mode mode;
- unsigned HOST_WIDE_INT v = value;
unsigned int offset = 0;
gcc_assert ((align & 0x3) == 0);
@@ -30065,10 +30064,8 @@ arm_block_set_aligned_vect (rtx dstbase,
dst = copy_addr_to_reg (XEXP (dstbase, 0));
- v = sext_hwi (v, BITS_PER_WORD);
-
reg = gen_reg_rtx (mode);
- val_vec = gen_const_vec_duplicate (mode, GEN_INT (v));
+ val_vec = gen_const_vec_duplicate (mode, gen_int_mode (value, QImode));
/* Emit instruction loading the constant value. */
emit_move_insn (reg, val_vec);
--
1.8.3.1
