* [committed] avoid double evaluation of PIC_OFFSET_TABLE_REGNUM
@ 2016-10-27 16:14 Aldy Hernandez
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From: Aldy Hernandez @ 2016-10-27 16:14 UTC (permalink / raw)
To: gcc-patches
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This patch was approved for stage1 a few months back, and I've neglected
to commit it. There are no changes from the posted patch.
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01373.html
Committed to trunk.
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commit 5321d430b8d2cf33ff2b5fd9d6cc3f8d1304b0a2
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Thu Mar 24 22:44:59 2016 -0500
* builtins.c (expand_builtin_nonlocal_goto): Avoid evaluating
PIC_OFFSET_TABLE_REGNUM twice.
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 997c0e8..cc711a0 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -1140,8 +1140,8 @@ expand_builtin_nonlocal_goto (tree exp)
to targets with a nonlocal_goto pattern; they are free
to implement it in their own way. Note also that this is
a no-op if the GP register is a global invariant.) */
- if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
- && fixed_regs[PIC_OFFSET_TABLE_REGNUM])
+ unsigned regnum = PIC_OFFSET_TABLE_REGNUM;
+ if (regnum != INVALID_REGNUM && fixed_regs[regnum])
emit_use (pic_offset_table_rtx);
emit_indirect_jump (r_label);
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