The 64-bit register indirect call does not use register %r1. So, %r1 shouldn't
be clobbered in
the call pattern. Normally, this doesn't matter as register %r1 is call
clobbered. However,
reload can fail when the register used for the indirect call needs to be
reloaded from a static
location. In this case, register %r1 is needed for the reload and the clobber
blocks the reload.
Tested on hppa64-hp-hpux11.11 and hppa2.0w-hp-hpux11.11. Committed to trunk,
gcc-5
and gcc-4.9.
Dave
--
John David Anglin dave.ang...@bell.net
2015-08-03 John David Anglin <dang...@gcc.gnu.org>
PR target/67060
* config/pa/pa.md (call_reg_64bit): Remove reg:DI 1 clobber.
Adjust splits to match new pattern.
Index: config/pa/pa.md
===================================================================
--- config/pa/pa.md (revision 226363)
+++ config/pa/pa.md (working copy)
@@ -7440,7 +7440,6 @@
(define_insn "call_reg_64bit"
[(call (mem:SI (match_operand:DI 0 "register_operand" "r"))
(match_operand 1 "" "i"))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(clobber (match_operand 2))
(use (reg:DI 27))
@@ -7461,7 +7460,6 @@
(define_split
[(parallel [(call (mem:SI (match_operand 0 "register_operand" ""))
(match_operand 1 "" ""))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(clobber (match_operand 2))
(use (reg:DI 27))
@@ -7472,7 +7470,6 @@
[(set (match_dup 2) (reg:DI 27))
(parallel [(call (mem:SI (match_dup 0))
(match_dup 1))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(use (reg:DI 27))
(use (reg:DI 29))
@@ -7482,7 +7479,6 @@
(define_split
[(parallel [(call (mem:SI (match_operand 0 "register_operand" ""))
(match_operand 1 "" ""))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(clobber (match_operand 2))
(use (reg:DI 27))
@@ -7492,7 +7488,6 @@
[(set (match_dup 2) (reg:DI 27))
(parallel [(call (mem:SI (match_dup 0))
(match_dup 1))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(use (reg:DI 27))
(use (reg:DI 29))
@@ -7503,7 +7498,6 @@
(define_insn "*call_reg_64bit_post_reload"
[(call (mem:SI (match_operand:DI 0 "register_operand" "r"))
(match_operand 1 "" "i"))
- (clobber (reg:DI 1))
(clobber (reg:DI 2))
(use (reg:DI 27))
(use (reg:DI 29))
