1 ; This tests for various complex cast elimination cases instcombine should 2 ; handle. 3 4 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" 5 6 ; RUN: opt < %s -instcombine -S | FileCheck %s 7 8 define i1 @test1(i32 %X) { 9 %A = bitcast i32 %X to i32 ; <i32> [#uses=1] 10 ; Convert to setne int %X, 12 11 %c = icmp ne i32 %A, 12 ; <i1> [#uses=1] 12 ret i1 %c 13 ; CHECK-LABEL: @test1( 14 ; CHECK: %c = icmp ne i32 %X, 12 15 ; CHECK: ret i1 %c 16 } 17 18 define i1 @test2(i32 %X, i32 %Y) { 19 %A = bitcast i32 %X to i32 ; <i32> [#uses=1] 20 %B = bitcast i32 %Y to i32 ; <i32> [#uses=1] 21 ; Convert to setne int %X, %Y 22 %c = icmp ne i32 %A, %B ; <i1> [#uses=1] 23 ret i1 %c 24 ; CHECK-LABEL: @test2( 25 ; CHECK: %c = icmp ne i32 %X, %Y 26 ; CHECK: ret i1 %c 27 } 28 29 define i32 @test4(i32 %A) { 30 %B = bitcast i32 %A to i32 ; <i32> [#uses=1] 31 %C = shl i32 %B, 2 ; <i32> [#uses=1] 32 %D = bitcast i32 %C to i32 ; <i32> [#uses=1] 33 ret i32 %D 34 ; CHECK-LABEL: @test4( 35 ; CHECK: %C = shl i32 %A, 2 36 ; CHECK: ret i32 %C 37 } 38 39 define i16 @test5(i16 %A) { 40 %B = sext i16 %A to i32 ; <i32> [#uses=1] 41 %C = and i32 %B, 15 ; <i32> [#uses=1] 42 %D = trunc i32 %C to i16 ; <i16> [#uses=1] 43 ret i16 %D 44 ; CHECK-LABEL: @test5( 45 ; CHECK: %C = and i16 %A, 15 46 ; CHECK: ret i16 %C 47 } 48 49 define i1 @test6(i1 %A) { 50 %B = zext i1 %A to i32 ; <i32> [#uses=1] 51 %C = icmp ne i32 %B, 0 ; <i1> [#uses=1] 52 ret i1 %C 53 ; CHECK-LABEL: @test6( 54 ; CHECK: ret i1 %A 55 } 56 57 define i1 @test6a(i1 %A) { 58 %B = zext i1 %A to i32 ; <i32> [#uses=1] 59 %C = icmp ne i32 %B, -1 ; <i1> [#uses=1] 60 ret i1 %C 61 ; CHECK-LABEL: @test6a( 62 ; CHECK: ret i1 true 63 } 64 65 define i1 @test7(i8* %A) { 66 %B = bitcast i8* %A to i32* ; <i32*> [#uses=1] 67 %C = icmp eq i32* %B, null ; <i1> [#uses=1] 68 ret i1 %C 69 ; CHECK-LABEL: @test7( 70 ; CHECK: %C = icmp eq i8* %A, null 71 ; CHECK: ret i1 %C 72 } 73
