-; RUN: opt %s -instcombine -S | \
-; RUN: not grep {(and\|xor\|add\|shl\|shr)}
-; END.
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128:n8:16:32:64"
define i32 @test1(i32 %x) {
%tmp.1 = and i32 %x, 65535 ; <i32> [#uses=1]
%tmp.2 = xor i32 %tmp.1, -32768 ; <i32> [#uses=1]
%tmp.3 = add i32 %tmp.2, 32768 ; <i32> [#uses=1]
ret i32 %tmp.3
+; CHECK: @test1
+; CHECK: %sext = shl i32 %x, 16
+; CHECK: %tmp.3 = ashr exact i32 %sext, 16
+; CHECK: ret i32 %tmp.3
}
define i32 @test2(i32 %x) {
%tmp.2 = xor i32 %tmp.1, 32768 ; <i32> [#uses=1]
%tmp.3 = add i32 %tmp.2, -32768 ; <i32> [#uses=1]
ret i32 %tmp.3
+; CHECK: @test2
+; CHECK: %sext = shl i32 %x, 16
+; CHECK: %tmp.3 = ashr exact i32 %sext, 16
+; CHECK: ret i32 %tmp.3
}
define i32 @test3(i16 %P) {
%tmp.4 = xor i32 %tmp.1, 32768 ; <i32> [#uses=1]
%tmp.5 = add i32 %tmp.4, -32768 ; <i32> [#uses=1]
ret i32 %tmp.5
+; CHECK: @test3
+; CHECK: %tmp.5 = sext i16 %P to i32
+; CHECK: ret i32 %tmp.5
}
define i32 @test4(i16 %P) {
%tmp.4 = xor i32 %tmp.1, 32768 ; <i32> [#uses=1]
%tmp.5 = add i32 %tmp.4, -32768 ; <i32> [#uses=1]
ret i32 %tmp.5
+; CHECK: @test4
+; CHECK: %tmp.5 = sext i16 %P to i32
+; CHECK: ret i32 %tmp.5
}
define i32 @test5(i32 %x) {
- %tmp.1 = and i32 %x, 254 ; <i32> [#uses=1]
+ %tmp.1 = and i32 %x, 255 ; <i32> [#uses=1]
%tmp.2 = xor i32 %tmp.1, 128 ; <i32> [#uses=1]
%tmp.3 = add i32 %tmp.2, -128 ; <i32> [#uses=1]
ret i32 %tmp.3
+; CHECK: @test5
+; CHECK: %sext = shl i32 %x, 24
+; CHECK: %tmp.3 = ashr exact i32 %sext, 24
+; CHECK: ret i32 %tmp.3
}
define i32 @test6(i32 %x) {
%tmp.2 = shl i32 %x, 16 ; <i32> [#uses=1]
%tmp.4 = ashr i32 %tmp.2, 16 ; <i32> [#uses=1]
ret i32 %tmp.4
+; CHECK: @test6
+; CHECK: %tmp.2 = shl i32 %x, 16
+; CHECK: %tmp.4 = ashr exact i32 %tmp.2, 16
+; CHECK: ret i32 %tmp.4
+}
+
+define i32 @test7(i16 %P) {
+ %tmp.1 = zext i16 %P to i32 ; <i32> [#uses=1]
+ %sext1 = shl i32 %tmp.1, 16 ; <i32> [#uses=1]
+ %tmp.5 = ashr i32 %sext1, 16 ; <i32> [#uses=1]
+ ret i32 %tmp.5
+; CHECK: @test7
+; CHECK: %tmp.5 = sext i16 %P to i32
+; CHECK: ret i32 %tmp.5
}
+define i32 @test8(i32 %x) nounwind readnone {
+entry:
+ %shr = lshr i32 %x, 5 ; <i32> [#uses=1]
+ %xor = xor i32 %shr, 67108864 ; <i32> [#uses=1]
+ %sub = add i32 %xor, -67108864 ; <i32> [#uses=1]
+ ret i32 %sub
+; CHECK: @test8
+; CHECK: %shr = ashr i32 %x, 5
+; CHECK: ret i32 %shr
+}