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| author | Richard Biener <rguenther@suse.de> | 2021-10-04 11:34:27 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-10-04 16:53:25 +0200 |
| commit | 7e0c0500808d58bca5b8e23cbd474022c32234e4 (patch) | |
| tree | 72b45f5368fadaa6410ef148ea6139f0a8160e2d /gcc/expr.c | |
| parent | 55a3be2f5255d69e740d61b2c5aaba1ccbc643b8 (diff) | |
| download | gcc-7e0c0500808d58bca5b8e23cbd474022c32234e4.zip gcc-7e0c0500808d58bca5b8e23cbd474022c32234e4.tar.gz gcc-7e0c0500808d58bca5b8e23cbd474022c32234e4.tar.bz2 | |
middle-end/102285 - refine .DEFERRED_INIT expansion
This refines the way we figure whether we are facing a register
that cannot be initialized by emitting a memset away from inspecting
expanded RTL of the LHS to using the predicates expand_assignment
is using to detect decls or MEM_REFs with non-memory DECL_RTL.
2021-10-04 Richard Biener <rguenther@suse.de>
* expr.h (non_mem_decl_p): Declare.
(mem_ref_refers_to_non_mem_p): Likewise.
* expr.c (non_mem_decl_p): Export.
(mem_ref_refers_to_non_mem_p): Likewise.
* internal-fn.c (expand_DEFERRED_INIT): Do not expand the LHS
but check the base with mem_ref_refers_to_non_mem_p
and non_mem_decl_p.
* c-c++-common/pr102285.c: New testcase.
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -5305,7 +5305,7 @@ get_bit_range (poly_uint64_pod *bitstart, poly_uint64_pod *bitend, tree exp, has non-BLKmode. DECL_RTL must not be a MEM; if DECL_RTL was not set yet, return false. */ -static inline bool +bool non_mem_decl_p (tree base) { if (!DECL_P (base) @@ -5322,7 +5322,7 @@ non_mem_decl_p (tree base) /* Returns true if REF refers to an object that does not reside in memory and has non-BLKmode. */ -static inline bool +bool mem_ref_refers_to_non_mem_p (tree ref) { tree base; |