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authorRichard Sandiford <richard.sandiford@linaro.org>2017-06-12 16:06:38 +0000
committerRichard Sandiford <rsandifo@gcc.gnu.org>2017-06-12 16:06:38 +0000
commite701e0b9e8c74e5e93764556a447ea334e4e9389 (patch)
tree3ddda6c404d525cc5ed663ea3b8f6470ade31c0c /gcc/combine.c
parent64ff4f60d0ac97acdfd869d3655cc962923faa20 (diff)
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Fix pessimistic DImode handling in combine.c:make_field_assignment
The make_field_assignment code: src = force_to_mode (src, mode, GET_MODE_PRECISION (mode) >= HOST_BITS_PER_WIDE_INT ? HOST_WIDE_INT_M1U : (HOST_WIDE_INT_1U << len) - 1, 0); would ignore the field length len for DImode, even though DImode can be handled using HWIs. I think the code should be testing len instead. 2017-06-12 Richard Sandiford <richard.sandiford@linaro.org> gcc/ * combine.c (make_field_assignment): Check len rather than the mode precision when calling force_to_mode. From-SVN: r249128
Diffstat (limited to 'gcc/combine.c')
-rw-r--r--gcc/combine.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c
index 39ef3c6..2d49bc2 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -9634,7 +9634,7 @@ make_field_assignment (rtx x)
other, pos),
dest);
src = force_to_mode (src, mode,
- GET_MODE_PRECISION (mode) >= HOST_BITS_PER_WIDE_INT
+ len >= HOST_BITS_PER_WIDE_INT
? HOST_WIDE_INT_M1U
: (HOST_WIDE_INT_1U << len) - 1,
0);