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Adjust literal pool offset in Thumb-2 movsi patterns

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My previous change to the Thumb-2 movsi patterns caused a codesize regression
with -Os in large functions.  Fix this by using the literal pool offset of the
16-bit literal load so that the literal pool is dumped earlier, reducing the
number of 32-bit literal loads.

Bootstrap & regress OK on arm-none-linux-gnueabihf --with-cpu=cortex-a57

    gcc/
	* config/arm/thumb2.md (thumb2_movsi_insn): Adjust literal offset.
	* config/arm/vfp.md (thumb2_movsi_vfp): Likewise.

From-SVN: r273911
This commit is contained in:
Wilco Dijkstra 2019-07-30 15:27:04 +00:00 committed by Wilco Dijkstra
parent d9c425fb65
commit cefbac6ec7
3 changed files with 7 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-07-30 Wilco Dijkstra <wdijkstr@arm.com>
* config/arm/thumb2.md (thumb2_movsi_insn): Adjust literal offset.
* config/arm/vfp.md (thumb2_movsi_vfp): Likewise.
2019-07-30 Martin Liska <mliska@suse.cz>
PR ipa/89330

2
gcc/config/arm/thumb2.md
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@ -274,7 +274,7 @@
(set_attr "length" "2,4,2,4,4,4,4")
(set_attr "predicable" "yes")
(set_attr "predicable_short_it" "yes,no,yes,no,no,no,no")
(set_attr "pool_range" "*,*,*,*,*,4094,*")
(set_attr "pool_range" "*,*,*,*,*,1018,*")
(set_attr "neg_pool_range" "*,*,*,*,*,0,*")]
)

2
gcc/config/arm/vfp.md
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@ -297,7 +297,7 @@
(set_attr "predicable_short_it" "yes,no,yes,no,no,no,no,no,no,no,no,no")
(set_attr "type" "mov_reg,mov_reg,mov_reg,mvn_reg,mov_imm,load_4,store_4,f_mcr,f_mrc,fmov,f_loads,f_stores")
(set_attr "length" "2,4,2,4,4,4,4,4,4,4,4,4")
(set_attr "pool_range" "*,*,*,*,*,4094,*,*,*,*,1018,*")
(set_attr "pool_range" "*,*,*,*,*,1018,*,*,*,*,1018,*")
(set_attr "neg_pool_range" "*,*,*,*,*, 0,*,*,*,*,1008,*")]
)