1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 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" 3 4 ; Instcombine should be able to eliminate all of these ext casts. 5 6 declare void @use(i32) 7 8 define i64 @test1(i64 %a) { 9 %b = trunc i64 %a to i32 10 %c = and i32 %b, 15 11 %d = zext i32 %c to i64 12 call void @use(i32 %b) 13 ret i64 %d 14 ; CHECK: @test1 15 ; CHECK: %d = and i64 %a, 15 16 ; CHECK: ret i64 %d 17 } 18 define i64 @test2(i64 %a) { 19 %b = trunc i64 %a to i32 20 %c = shl i32 %b, 4 21 %q = ashr i32 %c, 4 22 %d = sext i32 %q to i64 23 call void @use(i32 %b) 24 ret i64 %d 25 ; CHECK: @test2 26 ; CHECK: shl i64 %a, 36 27 ; CHECK: %d = ashr exact i64 {{.*}}, 36 28 ; CHECK: ret i64 %d 29 } 30 define i64 @test3(i64 %a) { 31 %b = trunc i64 %a to i32 32 %c = and i32 %b, 8 33 %d = zext i32 %c to i64 34 call void @use(i32 %b) 35 ret i64 %d 36 ; CHECK: @test3 37 ; CHECK: %d = and i64 %a, 8 38 ; CHECK: ret i64 %d 39 } 40 define i64 @test4(i64 %a) { 41 %b = trunc i64 %a to i32 42 %c = and i32 %b, 8 43 %x = xor i32 %c, 8 44 %d = zext i32 %x to i64 45 call void @use(i32 %b) 46 ret i64 %d 47 ; CHECK: @test4 48 ; CHECK: = and i64 %a, 8 49 ; CHECK: %d = xor i64 {{.*}}, 8 50 ; CHECK: ret i64 %d 51 } 52 53 define i32 @test5(i32 %A) { 54 %B = zext i32 %A to i128 55 %C = lshr i128 %B, 16 56 %D = trunc i128 %C to i32 57 ret i32 %D 58 ; CHECK: @test5 59 ; CHECK: %C = lshr i32 %A, 16 60 ; CHECK: ret i32 %C 61 } 62 63 define i32 @test6(i64 %A) { 64 %B = zext i64 %A to i128 65 %C = lshr i128 %B, 32 66 %D = trunc i128 %C to i32 67 ret i32 %D 68 ; CHECK: @test6 69 ; CHECK: %C = lshr i64 %A, 32 70 ; CHECK: %D = trunc i64 %C to i32 71 ; CHECK: ret i32 %D 72 } 73 74 define i92 @test7(i64 %A) { 75 %B = zext i64 %A to i128 76 %C = lshr i128 %B, 32 77 %D = trunc i128 %C to i92 78 ret i92 %D 79 ; CHECK: @test7 80 ; CHECK: %B = zext i64 %A to i92 81 ; CHECK: %C = lshr i92 %B, 32 82 ; CHECK: ret i92 %C 83 } 84 85 define i64 @test8(i32 %A, i32 %B) { 86 %tmp38 = zext i32 %A to i128 87 %tmp32 = zext i32 %B to i128 88 %tmp33 = shl i128 %tmp32, 32 89 %ins35 = or i128 %tmp33, %tmp38 90 %tmp42 = trunc i128 %ins35 to i64 91 ret i64 %tmp42 92 ; CHECK: @test8 93 ; CHECK: %tmp38 = zext i32 %A to i64 94 ; CHECK: %tmp32 = zext i32 %B to i64 95 ; CHECK: %tmp33 = shl nuw i64 %tmp32, 32 96 ; CHECK: %ins35 = or i64 %tmp33, %tmp38 97 ; CHECK: ret i64 %ins35 98 } 99 100 define i8 @test9(i32 %X) { 101 %Y = and i32 %X, 42 102 %Z = trunc i32 %Y to i8 103 ret i8 %Z 104 ; CHECK: @test9 105 ; CHECK: trunc 106 ; CHECK: and 107 ; CHECK: ret 108 } 109 110 ; rdar://8808586 111 define i8 @test10(i32 %X) { 112 %Y = trunc i32 %X to i8 113 %Z = and i8 %Y, 42 114 ret i8 %Z 115 ; CHECK: @test10 116 ; CHECK: trunc 117 ; CHECK: and 118 ; CHECK: ret 119 } 120
