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changeset 3561:dc333950f54f

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7063674: Wrong results from basic comparisons after calls to Long.bitCount(long) Reviewed-by: kvn
author twisti
date Mon, 11 Jun 2012 16:47:41 -0700
parents 5d718ef6233b
children ce8d9e20eded dd22c97d7663
files src/cpu/x86/vm/x86_32.ad src/cpu/x86/vm/x86_64.ad
diffstat 2 files changed, 20 insertions(+), 11 deletions(-) [+]
line wrap: on
line diff
--- a/src/cpu/x86/vm/x86_32.ad	Thu Jun 14 02:12:46 2012 -0700
+++ b/src/cpu/x86/vm/x86_32.ad	Mon Jun 11 16:47:41 2012 -0700
@@ -5586,8 +5586,9 @@
   ins_pipe( ialu_reg_reg);
 %}
 
-instruct bytes_reverse_unsigned_short(eRegI dst) %{
+instruct bytes_reverse_unsigned_short(eRegI dst, eFlagsReg cr) %{
   match(Set dst (ReverseBytesUS dst));
+  effect(KILL cr);
 
   format %{ "BSWAP  $dst\n\t" 
             "SHR    $dst,16\n\t" %}
@@ -5598,8 +5599,9 @@
   ins_pipe( ialu_reg );
 %}
 
-instruct bytes_reverse_short(eRegI dst) %{
+instruct bytes_reverse_short(eRegI dst, eFlagsReg cr) %{
   match(Set dst (ReverseBytesS dst));
+  effect(KILL cr);
 
   format %{ "BSWAP  $dst\n\t" 
             "SAR    $dst,16\n\t" %}
@@ -5760,9 +5762,10 @@
 
 //---------- Population Count Instructions -------------------------------------
 
-instruct popCountI(eRegI dst, eRegI src) %{
+instruct popCountI(eRegI dst, eRegI src, eFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountI src));
+  effect(KILL cr);
 
   format %{ "POPCNT $dst, $src" %}
   ins_encode %{
@@ -5771,9 +5774,10 @@
   ins_pipe(ialu_reg);
 %}
 
-instruct popCountI_mem(eRegI dst, memory mem) %{
+instruct popCountI_mem(eRegI dst, memory mem, eFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountI (LoadI mem)));
+  effect(KILL cr);
 
   format %{ "POPCNT $dst, $mem" %}
   ins_encode %{
--- a/src/cpu/x86/vm/x86_64.ad	Thu Jun 14 02:12:46 2012 -0700
+++ b/src/cpu/x86/vm/x86_64.ad	Mon Jun 11 16:47:41 2012 -0700
@@ -6409,14 +6409,14 @@
   match(Set dst (ReverseBytesL dst));
 
   format %{ "bswapq  $dst" %}
-
   opcode(0x0F, 0xC8); /* Opcode 0F /C8 */
   ins_encode( REX_reg_wide(dst), OpcP, opc2_reg(dst) );
   ins_pipe( ialu_reg);
 %}
 
-instruct bytes_reverse_unsigned_short(rRegI dst) %{
+instruct bytes_reverse_unsigned_short(rRegI dst, rFlagsReg cr) %{
   match(Set dst (ReverseBytesUS dst));
+  effect(KILL cr);
 
   format %{ "bswapl  $dst\n\t"
             "shrl    $dst,16\n\t" %}
@@ -6427,8 +6427,9 @@
   ins_pipe( ialu_reg );
 %}
 
-instruct bytes_reverse_short(rRegI dst) %{
+instruct bytes_reverse_short(rRegI dst, rFlagsReg cr) %{
   match(Set dst (ReverseBytesS dst));
+  effect(KILL cr);
 
   format %{ "bswapl  $dst\n\t"
             "sar     $dst,16\n\t" %}
@@ -6556,9 +6557,10 @@
 
 //---------- Population Count Instructions -------------------------------------
 
-instruct popCountI(rRegI dst, rRegI src) %{
+instruct popCountI(rRegI dst, rRegI src, rFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountI src));
+  effect(KILL cr);
 
   format %{ "popcnt  $dst, $src" %}
   ins_encode %{
@@ -6567,9 +6569,10 @@
   ins_pipe(ialu_reg);
 %}
 
-instruct popCountI_mem(rRegI dst, memory mem) %{
+instruct popCountI_mem(rRegI dst, memory mem, rFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountI (LoadI mem)));
+  effect(KILL cr);
 
   format %{ "popcnt  $dst, $mem" %}
   ins_encode %{
@@ -6579,9 +6582,10 @@
 %}
 
 // Note: Long.bitCount(long) returns an int.
-instruct popCountL(rRegI dst, rRegL src) %{
+instruct popCountL(rRegI dst, rRegL src, rFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountL src));
+  effect(KILL cr);
 
   format %{ "popcnt  $dst, $src" %}
   ins_encode %{
@@ -6591,9 +6595,10 @@
 %}
 
 // Note: Long.bitCount(long) returns an int.
-instruct popCountL_mem(rRegI dst, memory mem) %{
+instruct popCountL_mem(rRegI dst, memory mem, rFlagsReg cr) %{
   predicate(UsePopCountInstruction);
   match(Set dst (PopCountL (LoadL mem)));
+  effect(KILL cr);
 
   format %{ "popcnt  $dst, $mem" %}
   ins_encode %{