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0bc6460 |
2015-02-26 Jakub Jelinek <jakub@redhat.com>
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
Aldy Hernandez <aldyh@redhat.com>
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
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0bc6460 |
PR rtl-optimization/65220
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
* config/i386/i386.md (*udivmod<mode>4_pow2): New.
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
--- gcc/config/i386/i386.md (revision 221063)
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+++ gcc/config/i386/i386.md (revision 221064)
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
@@ -7331,6 +7331,32 @@ (define_insn_and_split "*udivmod<mode>4"
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
[(set_attr "type" "multi")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
(set_attr "mode" "<MODE>")])
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+;; Optimize division or modulo by constant power of 2, if the constant
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+;; materializes only after expansion.
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+(define_insn_and_split "*udivmod<mode>4_pow2"
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ [(set (match_operand:SWI48 0 "register_operand" "=r")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (udiv:SWI48 (match_operand:SWI48 2 "register_operand" "0")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (match_operand:SWI48 3 "const_int_operand" "n")))
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (set (match_operand:SWI48 1 "register_operand" "=r")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (umod:SWI48 (match_dup 2) (match_dup 3)))
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (clobber (reg:CC FLAGS_REG))]
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ "UINTVAL (operands[3]) - 2 < <MODE_SIZE> * BITS_PER_UNIT
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ && (UINTVAL (operands[3]) & (UINTVAL (operands[3]) - 1)) == 0"
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ "#"
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ "&& reload_completed"
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ [(set (match_dup 1) (match_dup 2))
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0bc6460 |
+ (parallel [(set (match_dup 0) (lshiftrt:<MODE> (match_dup 2) (match_dup 4)))
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0bc6460 |
+ (clobber (reg:CC FLAGS_REG))])
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (parallel [(set (match_dup 1) (and:<MODE> (match_dup 1) (match_dup 5)))
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (clobber (reg:CC FLAGS_REG))])]
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+{
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ int v = exact_log2 (UINTVAL (operands[3]));
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0bc6460 |
+ operands[4] = GEN_INT (v);
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ operands[5] = GEN_INT ((HOST_WIDE_INT_1U << v) - 1);
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+}
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ [(set_attr "type" "multi")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ (set_attr "mode" "<MODE>")])
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+
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0bc6460 |
(define_insn "*udivmod<mode>4_noext"
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0bc6460 |
[(set (match_operand:SWIM248 0 "register_operand" "=a")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
(udiv:SWIM248 (match_operand:SWIM248 2 "register_operand" "0")
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
--- gcc/testsuite/gcc.target/i386/pr65520.c (revision 0)
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0bc6460 |
+++ gcc/testsuite/gcc.target/i386/pr65520.c (revision 221064)
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0bc6460 |
@@ -0,0 +1,20 @@
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0bc6460 |
+/* PR target/65520 */
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0bc6460 |
+/* { dg-do compile } */
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0bc6460 |
+/* { dg-options "-O2" } */
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+int foo (void *);
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+void
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+bar (void)
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+{
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ unsigned s = 128;
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ while (1)
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ {
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ unsigned b[s];
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ if (foo (b))
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ break;
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ s *= 2;
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+ }
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+}
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+
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![](https://seccdn.libravatar.org/avatar/134c60e534a993fcaf7da4634f4199430a0cdb8c7235fa894d5ee95eb7cc444d?s=16&d=retro) |
0bc6460 |
+/* { dg-final { scan-assembler-not "div\[^\n\r]*%" } } */
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