* [committed] Fix bogus CONST_WIDE_INT hash
@ 2017-08-21 10:50 Richard Sandiford
0 siblings, 0 replies; only message in thread
From: Richard Sandiford @ 2017-08-21 10:50 UTC (permalink / raw)
To: gcc-patches
The CONST_WIDE_INT case in const_rtx_hash_1 started the hash
with the precision of the mode, but the mode is always VOIDmode.
Tested on aarch64-linux-gnu and x86_64-linux-gnu. Applied as obvious.
Richard
2017-08-21 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* varasm.c (const_rtx_hash_1): Don't hash in the mode of a
CONST_WIDE_INT.
Index: gcc/varasm.c
===================================================================
--- gcc/varasm.c 2017-08-10 14:36:08.449457108 +0100
+++ gcc/varasm.c 2017-08-21 10:43:04.352530400 +0100
@@ -3639,7 +3639,7 @@ const_rtx_hash_1 (const_rtx x)
break;
case CONST_WIDE_INT:
- hwi = GET_MODE_PRECISION (mode);
+ hwi = 0;
{
for (i = 0; i < CONST_WIDE_INT_NUNITS (x); i++)
hwi ^= CONST_WIDE_INT_ELT (x, i);
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2017-08-21 10:50 [committed] Fix bogus CONST_WIDE_INT hash Richard Sandiford
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