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* [gcc r11-8183] Better const_vector printing
@ 2021-04-14 19:07 Richard Sandiford
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From: Richard Sandiford @ 2021-04-14 19:07 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:1fce5932a3af575cd02c1d2b786dd1b39b922ebe
commit r11-8183-g1fce5932a3af575cd02c1d2b786dd1b39b922ebe
Author: Richard Sandiford <richard.sandiford@arm.com>
Date: Wed Apr 14 20:06:44 2021 +0100
Better const_vector printing
Looking at PR99929 showed that we weren't dumping enough information
about variable-length CONST_VECTORs. Something like:
(const_vector:VNx4SI [(const_int 1) (const_int 0)])
could be either:
(a) 1, 0, 1, 0, repeating
(b) 1 followed by all zeros
This patch adds more information to the dumps. There are four cases:
(a) above:
(const_vector:VNx4SI repeat [
(const_int 1)
(const_int 0)
])
(b) above:
(const_vector:VNx4SI [
(const_int 1)
repeat [
(const_int 0)
]
])
a single stepped sequence:
(const_vector:VNx4SI [
(const_int 0)
stepped [
(const_int 1)
(const_int 2)
]
])
interleaved stepped sequences:
(const_vector:VNx4SI [
(const_int 0)
(const_int 40)
stepped (interleave 2) [
(const_int 1)
(const_int 41)
(const_int 2)
(const_int 42)
]
])
There are probably better syntaxes, but hopefully this is at least
an improvement on the status quo.
gcc/
* print-rtl.c (rtx_writer::print_rtx_operand_codes_E_and_V): Print
more information about variable-length CONST_VECTORs.
Diff:
---
gcc/print-rtl.c | 32 +++++++++++++++++++++++++++++++-
1 file changed, 31 insertions(+), 1 deletion(-)
diff --git a/gcc/print-rtl.c b/gcc/print-rtl.c
index c7982bce507..081fc50fab8 100644
--- a/gcc/print-rtl.c
+++ b/gcc/print-rtl.c
@@ -370,6 +370,10 @@ rtx_writer::print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx)
print_rtx_head, m_indent * 2, "");
m_sawclose = 0;
}
+ if (GET_CODE (in_rtx) == CONST_VECTOR
+ && !GET_MODE_NUNITS (GET_MODE (in_rtx)).is_constant ()
+ && CONST_VECTOR_DUPLICATE_P (in_rtx))
+ fprintf (m_outfile, " repeat");
fputs (" [", m_outfile);
if (XVEC (in_rtx, idx) != NULL)
{
@@ -377,12 +381,32 @@ rtx_writer::print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx)
if (XVECLEN (in_rtx, idx))
m_sawclose = 1;
+ int barrier = XVECLEN (in_rtx, idx);
+ if (GET_CODE (in_rtx) == CONST_VECTOR
+ && !GET_MODE_NUNITS (GET_MODE (in_rtx)).is_constant ())
+ barrier = CONST_VECTOR_NPATTERNS (in_rtx);
+
for (int j = 0; j < XVECLEN (in_rtx, idx); j++)
{
int j1;
+ if (j == barrier)
+ {
+ fprintf (m_outfile, "\n%s%*s",
+ print_rtx_head, m_indent * 2, "");
+ if (!CONST_VECTOR_STEPPED_P (in_rtx))
+ fprintf (m_outfile, "repeat [");
+ else if (CONST_VECTOR_NPATTERNS (in_rtx) == 1)
+ fprintf (m_outfile, "stepped [");
+ else
+ fprintf (m_outfile, "stepped (interleave %d) [",
+ CONST_VECTOR_NPATTERNS (in_rtx));
+ m_indent += 2;
+ }
+
print_rtx (XVECEXP (in_rtx, idx, j));
- for (j1 = j + 1; j1 < XVECLEN (in_rtx, idx); j1++)
+ int limit = MIN (barrier, XVECLEN (in_rtx, idx));
+ for (j1 = j + 1; j1 < limit; j1++)
if (XVECEXP (in_rtx, idx, j) != XVECEXP (in_rtx, idx, j1))
break;
@@ -393,6 +417,12 @@ rtx_writer::print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx)
}
}
+ if (barrier < XVECLEN (in_rtx, idx))
+ {
+ m_indent -= 2;
+ fprintf (m_outfile, "\n%s%*s]", print_rtx_head, m_indent * 2, "");
+ }
+
m_indent -= 2;
}
if (m_sawclose)
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