[llvm-commits] CVS: llvm/lib/Target/PowerPC/README.txt

[Chris Lattner]

Changes in directory llvm/lib/Target/PowerPC:

README.txt updated: 1.113 -> 1.114
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Log message:

add a note


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Diffs of the changes:  (+23 -0)

 README.txt |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+)


Index: llvm/lib/Target/PowerPC/README.txt
diff -u llvm/lib/Target/PowerPC/README.txt:1.113 llvm/lib/Target/PowerPC/README.txt:1.114
--- llvm/lib/Target/PowerPC/README.txt:1.113	Sun Mar 25 00:10:46 2007
+++ llvm/lib/Target/PowerPC/README.txt	Sat Mar 31 02:06:25 2007
@@ -639,3 +639,26 @@
 The dead or is a 'truncate' from 64- to 32-bits.
 
 ===-------------------------------------------------------------------------===
+
+We generate horrible ppc code for this:
+
+#define N  2000000
+double   a[N],c[N];
+void simpleloop() {
+   int j;
+   for (j=0; j<N; j++)
+     c[j] = a[j];
+}
+
+LBB1_1: ;bb
+        lfdx f0, r3, r4
+        addi r5, r5, 1                 ;; Extra IV for the exit value compare.
+        stfdx f0, r2, r4
+        addi r4, r4, 8
+
+        xoris r6, r5, 30               ;; This is due to a large immediate.
+        cmplwi cr0, r6, 33920
+        bne cr0, LBB1_1
+
+===-------------------------------------------------------------------------===
+