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Fix ALL_REGS thinko in initialisation of function_used_regs

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My change to the -fipa-ra bookkeeping used ALL_REGS as the supposedly
safe default assumption, but ALL_REGS isn't literally all registers,
just a close approximation.

This caused a bootstrap failure on arm-linux-gnu, where the condition
code register isn't in ALL_REGS and so was being masked out of some
call-clobbered sets.

2019-10-02  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* cgraph.c (cgraph_node::rtl_info): Use SET_HARD_REG_SET
	instead of reg_class_contents[ALL_REGS].

From-SVN: r276489
This commit is contained in:
Richard Sandiford 2019-10-02 21:19:35 +00:00 committed by Richard Sandiford
parent b7c4123032
commit aa29ed6db6
2 changed files with 6 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-10-02 Richard Sandiford <richard.sandiford@arm.com>
* cgraph.c (cgraph_node::rtl_info): Use SET_HARD_REG_SET
instead of reg_class_contents[ALL_REGS].
2019-09-30 Jason Merrill <jason@redhat.com>
Add some hash_map_safe_* functions like vec_safe_*.

2
gcc/cgraph.c
View File

@ -1866,7 +1866,7 @@ cgraph_node::rtl_info (const_tree decl)
if (node->rtl == NULL)
{
node->rtl = ggc_cleared_alloc<cgraph_rtl_info> ();
node->rtl->function_used_regs = reg_class_contents[ALL_REGS];
SET_HARD_REG_SET (node->rtl->function_used_regs);
}
return node->rtl;
}