-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
-; RUN: grep ret | count 3
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
-; RUN: not grep call.*bswap
+; RUN: opt < %s -instcombine -S | not grep call.*bswap
define i1 @test1(i16 %tmp2) {
- %tmp10 = call i16 @llvm.bswap.i16( i16 %tmp2 ) ; <i16> [#uses=1]
- %tmp = icmp eq i16 %tmp10, 1 ; <i1> [#uses=1]
+ %tmp10 = call i16 @llvm.bswap.i16( i16 %tmp2 )
+ %tmp = icmp eq i16 %tmp10, 1
ret i1 %tmp
}
define i1 @test2(i32 %tmp) {
- %tmp34 = tail call i32 @llvm.bswap.i32( i32 %tmp ) ; <i32> [#uses=1]
- %tmp.upgrd.1 = icmp eq i32 %tmp34, 1 ; <i1> [#uses=1]
+ %tmp34 = tail call i32 @llvm.bswap.i32( i32 %tmp )
+ %tmp.upgrd.1 = icmp eq i32 %tmp34, 1
ret i1 %tmp.upgrd.1
}
declare i32 @llvm.bswap.i32(i32)
define i1 @test3(i64 %tmp) {
- %tmp34 = tail call i64 @llvm.bswap.i64( i64 %tmp ) ; <i64> [#uses=1]
- %tmp.upgrd.2 = icmp eq i64 %tmp34, 1 ; <i1> [#uses=1]
+ %tmp34 = tail call i64 @llvm.bswap.i64( i64 %tmp )
+ %tmp.upgrd.2 = icmp eq i64 %tmp34, 1
ret i1 %tmp.upgrd.2
}
declare i16 @llvm.bswap.i16(i16)
+; rdar://5992453
+; A & 255
+define i32 @test4(i32 %a) nounwind {
+entry:
+ %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
+ %tmp4 = lshr i32 %tmp2, 24
+ ret i32 %tmp4
+}
+
+; A
+define i32 @test5(i32 %a) nounwind {
+entry:
+ %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
+ %tmp4 = tail call i32 @llvm.bswap.i32( i32 %tmp2 )
+ ret i32 %tmp4
+}
+
+; a >> 24
+define i32 @test6(i32 %a) nounwind {
+entry:
+ %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
+ %tmp4 = and i32 %tmp2, 255
+ ret i32 %tmp4
+}
+
+; PR5284
+define i16 @test7(i32 %A) {
+ %B = tail call i32 @llvm.bswap.i32(i32 %A) nounwind
+ %C = trunc i32 %B to i16
+ %D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
+ ret i16 %D
+}
+
+define i16 @test8(i64 %A) {
+ %B = tail call i64 @llvm.bswap.i64(i64 %A) nounwind
+ %C = trunc i64 %B to i16
+ %D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
+ ret i16 %D
+}
+
+; Misc: Fold bswap(undef) to undef.
+define i64 @foo() {
+ %a = call i64 @llvm.bswap.i64(i64 undef)
+ ret i64 %a
+}