Author: Armin Rigo <[email protected]>
Branch: use-gcc
Changeset: r1895:a89f21f5670b
Date: 2015-07-08 15:09 +0200
http://bitbucket.org/pypy/stmgc/changeset/a89f21f5670b/
Log: Count the extra segment prefix in the estimation of instruction
sizes
diff --git a/gcc-seg-gs/gcc-5.1.0-patch.diff b/gcc-seg-gs/gcc-5.1.0-patch.diff
--- a/gcc-seg-gs/gcc-5.1.0-patch.diff
+++ b/gcc-seg-gs/gcc-5.1.0-patch.diff
@@ -120,14 +120,37 @@
x = XEXP (x, 0);
/* Avoid (%rip) for call operands. */
if (CONSTANT_ADDRESS_P (x) && code == 'P'
-@@ -51816,6 +51830,130 @@
+@@ -26015,6 +26029,7 @@
+ for (i = recog_data.n_operands - 1; i >= 0; --i)
+ if (MEM_P (recog_data.operand[i]))
+ {
++ int addr_space;
+ constrain_operands_cached (insn, reload_completed);
+ if (which_alternative != -1)
+ {
+@@ -26030,7 +26045,13 @@
+ if (*constraints == 'X')
+ continue;
+ }
+- return memory_address_length (XEXP (recog_data.operand[i], 0), false);
++
++ /**** <AR> ****/
++ addr_space = MEM_ADDR_SPACE(recog_data.operand[i]);
++ /* account for one byte segment prefix for SEG_FS/SEG_GS addr spaces */
++ return (addr_space == ADDR_SPACE_GENERIC ? 0 : 1)
++ /**** </AR> ****/
++ + memory_address_length (XEXP (recog_data.operand[i], 0), false);
+ }
+ return 0;
+ }
+@@ -51816,6 +51837,130 @@
}
#endif
+
+/***** <AR> *****/
+
-+/*** GS segment register addressing mode ***/
++/*** FS/GS segment register addressing mode ***/
+
+static machine_mode
+ix86_addr_space_pointer_mode (addr_space_t as)
@@ -182,7 +205,7 @@
+
+/* The default, SEG_FS and SEG_GS address spaces are all "subsets" of
+ each other. */
-+bool static
++bool static
+ix86_addr_space_subset_p (addr_space_t subset, addr_space_t superset)
+{
+ gcc_assert (subset == ADDR_SPACE_GENERIC ||
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