Changes in directory llvm/test/Regression/Transforms/InstCombine:
bswap.ll updated: 1.2 -> 1.3
---
Log message:
new bswap idiom
---
Diffs of the changes: (+20 -1)
bswap.ll | 21 ++++++++++++++++++++-
1 files changed, 20 insertions(+), 1 deletion(-)
Index: llvm/test/Regression/Transforms/InstCombine/bswap.ll
diff -u llvm/test/Regression/Transforms/InstCombine/bswap.ll:1.2
llvm/test/Regression/Transforms/InstCombine/bswap.ll:1.3
--- llvm/test/Regression/Transforms/InstCombine/bswap.ll:1.2 Mon Jul 10
15:25:01 2006
+++ llvm/test/Regression/Transforms/InstCombine/bswap.ll Wed Nov 29
01:21:08 2006
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' |
wc -l | grep 4
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' |
wc -l | grep 5
uint %test1(uint %i) {
%tmp1 = shr uint %i, ubyte 24 ; <uint> [#uses=1]
@@ -40,3 +40,22 @@
ret ushort %tmp5
}
+; unsigned short test5(unsigned short a) {
+; return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8);
+;}
+ushort %test5(ushort %a) {
+ %tmp = zext ushort %a to int
+ %tmp1 = and int %tmp, 65280
+ %tmp2 = ashr int %tmp1, ubyte 8
+ %tmp2 = trunc int %tmp2 to short
+ %tmp3 = zext ushort %a to int
+ %tmp4 = and int %tmp3, 255
+ %tmp5 = shl int %tmp4, ubyte 8
+ %tmp5 = trunc int %tmp5 to short
+ %tmp = or short %tmp2, %tmp5
+ %tmp6 = bitcast short %tmp to ushort
+ %tmp6 = zext ushort %tmp6 to int
+ %retval = trunc int %tmp6 to ushort
+ ret ushort %retval
+}
+
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