c83e2d4757
This patch improves the codegen for the following test case:
uint64x2_t foo (uint64x2_t r) {
uint32x4_t a = vreinterpretq_u32_u64 (r);
uint32_t t;
t = a[0]; a[0] = a[1]; a[1] = t;
t = a[2]; a[2] = a[3]; a[3] = t;
return vreinterpretq_u64_u32 (a);
}
from (-O1):
foo:
mov v31.16b, v0.16b
ins v0.s[0], v0.s[1]
ins v0.s[1], v31.s[0]
ins v0.s[2], v31.s[3]
ins v0.s[3], v31.s[2]
ret
to:
foo:
rev64 v0.4s, v0.4s
ret
This is achieved by extending the following match.pd pattern to account
for type differences between @0 and @1 due to view converts.
/* Simplify vector inserts of other vector extracts to a permute. */
(simplify
(bit_insert @0 (BIT_FIELD_REF@2 @1 @rsize @rpos) @ipos)
The patch was bootstrapped and regtested on aarch64-linux-gnu and
x86_64-linux-gnu, no regression.
OK for mainline?
Signed-off-by: Jennifer Schmitz <jschmitz@nvidia.com>
Co-authored-by: Richard Biener <rguenther@suse.de>
gcc/
PR tree-optimization/117093
* match.pd: Extend
(bit_insert @0 (BIT_FIELD_REF@2 @1 @rsize @rpos) @ipos) to allow
type differences between @0 and @1 due to view converts.
gcc/testsuite/
PR tree-optimization/117093
* gcc.dg/tree-ssa/pr117093.c: New test.
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| .forgejo | ||
| .github | ||
| c++tools | ||
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| libtool.m4 | ||
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| Makefile.def | ||
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| symlink-tree | ||
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