X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FTransforms%2FInstCombine%2Fbswap.ll;h=ba7df3125f4ef382afea9bf73642b7fe2b01b8bd;hb=7b837d8c75f78fe55c9b348b9ec2281169a48d2a;hp=5db4e73a546305f62b89ecb045cf13305ab12599;hpb=76806b6a434ad5477727d3733d18fe309a1281fe;p=oota-llvm.git

diff --git a/test/Transforms/InstCombine/bswap.ll b/test/Transforms/InstCombine/bswap.ll
index 5db4e73a546..ba7df3125f4 100644
--- a/test/Transforms/InstCombine/bswap.ll
+++ b/test/Transforms/InstCombine/bswap.ll
@@ -1,5 +1,7 @@
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
-; RUN:    grep {call.*llvm.bswap} | count 5
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
+
+; RUN: opt < %s -instcombine -S | \
+; RUN:    grep "call.*llvm.bswap" | count 6
 
 define i32 @test1(i32 %i) {
 	%tmp1 = lshr i32 %i, 24		; <i32> [#uses=1]
@@ -55,3 +57,18 @@ define i16 @test5(i16 %a) {
 	%retval = trunc i32 %tmp6.upgrd.4 to i16		; <i16> [#uses=1]
 	ret i16 %retval
 }
+
+; PR2842
+define i32 @test6(i32 %x) nounwind readnone {
+	%tmp = shl i32 %x, 16		; <i32> [#uses=1]
+	%x.mask = and i32 %x, 65280		; <i32> [#uses=1]
+	%tmp1 = lshr i32 %x, 16		; <i32> [#uses=1]
+	%tmp2 = and i32 %tmp1, 255		; <i32> [#uses=1]
+	%tmp3 = or i32 %x.mask, %tmp		; <i32> [#uses=1]
+	%tmp4 = or i32 %tmp3, %tmp2		; <i32> [#uses=1]
+	%tmp5 = shl i32 %tmp4, 8		; <i32> [#uses=1]
+	%tmp6 = lshr i32 %x, 24		; <i32> [#uses=1]
+	%tmp7 = or i32 %tmp5, %tmp6		; <i32> [#uses=1]
+	ret i32 %tmp7
+}
+