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changeset 8156:3edb9da05f94

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8071731: Better scaling for C1 Reviewed-by: kvn, iveresov
author roland
date Mon, 09 Mar 2015 09:59:53 +0100
parents 9030d57ba158
children a41341e51f0b
files src/share/vm/c1/c1_LIRGenerator.cpp
diffstat 1 files changed, 9 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/c1/c1_LIRGenerator.cpp	Wed Jan 28 21:43:06 2015 +0000
+++ b/src/share/vm/c1/c1_LIRGenerator.cpp	Mon Mar 09 09:59:53 2015 +0100
@@ -2204,7 +2204,15 @@
   if (log2_scale != 0) {
     // temporary fix (platform dependent code without shift on Intel would be better)
     // TODO: ARM also allows embedded shift in the address
-    __ shift_left(index_op, log2_scale, index_op);
+    LIR_Opr tmp = new_pointer_register();
+    if (TwoOperandLIRForm) {
+      __ move(index_op, tmp);
+      index_op = tmp;
+    }
+    __ shift_left(index_op, log2_scale, tmp);
+    if (!TwoOperandLIRForm) {
+      index_op = tmp;
+    }
   }
 
   LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());