1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -instcombine -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; PR3021 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; When inst combining an FCMP with the LHS coming from a uitofp instruction, we 5*9880d681SAndroid Build Coastguard Worker; can't lower it to signed ICMP instructions. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1( 8*9880d681SAndroid Build Coastguard Workerdefine i1 @test1(i32 %val) { 9*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 10*9880d681SAndroid Build Coastguard Worker %2 = fcmp ole double %1, 0.000000e+00 11*9880d681SAndroid Build Coastguard Worker; CHECK: icmp eq i32 %val, 0 12*9880d681SAndroid Build Coastguard Worker ret i1 %2 13*9880d681SAndroid Build Coastguard Worker} 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test2( 16*9880d681SAndroid Build Coastguard Workerdefine i1 @test2(i32 %val) { 17*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 18*9880d681SAndroid Build Coastguard Worker %2 = fcmp olt double %1, 0.000000e+00 19*9880d681SAndroid Build Coastguard Worker ret i1 %2 20*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 false 21*9880d681SAndroid Build Coastguard Worker} 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test3( 24*9880d681SAndroid Build Coastguard Workerdefine i1 @test3(i32 %val) { 25*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 26*9880d681SAndroid Build Coastguard Worker %2 = fcmp oge double %1, 0.000000e+00 27*9880d681SAndroid Build Coastguard Worker ret i1 %2 28*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 29*9880d681SAndroid Build Coastguard Worker} 30*9880d681SAndroid Build Coastguard Worker 31*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test4( 32*9880d681SAndroid Build Coastguard Workerdefine i1 @test4(i32 %val) { 33*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 34*9880d681SAndroid Build Coastguard Worker %2 = fcmp ogt double %1, 0.000000e+00 35*9880d681SAndroid Build Coastguard Worker; CHECK: icmp ne i32 %val, 0 36*9880d681SAndroid Build Coastguard Worker ret i1 %2 37*9880d681SAndroid Build Coastguard Worker} 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test5( 40*9880d681SAndroid Build Coastguard Workerdefine i1 @test5(i32 %val) { 41*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 42*9880d681SAndroid Build Coastguard Worker %2 = fcmp ogt double %1, -4.400000e+00 43*9880d681SAndroid Build Coastguard Worker ret i1 %2 44*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true 45*9880d681SAndroid Build Coastguard Worker} 46*9880d681SAndroid Build Coastguard Worker 47*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test6( 48*9880d681SAndroid Build Coastguard Workerdefine i1 @test6(i32 %val) { 49*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 50*9880d681SAndroid Build Coastguard Worker %2 = fcmp olt double %1, -4.400000e+00 51*9880d681SAndroid Build Coastguard Worker ret i1 %2 52*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 false 53*9880d681SAndroid Build Coastguard Worker} 54*9880d681SAndroid Build Coastguard Worker 55*9880d681SAndroid Build Coastguard Worker; Check that optimizing unsigned >= comparisons correctly distinguishes 56*9880d681SAndroid Build Coastguard Worker; positive and negative constants. <rdar://problem/12029145> 57*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test7( 58*9880d681SAndroid Build Coastguard Workerdefine i1 @test7(i32 %val) { 59*9880d681SAndroid Build Coastguard Worker %1 = uitofp i32 %val to double 60*9880d681SAndroid Build Coastguard Worker %2 = fcmp oge double %1, 3.200000e+00 61*9880d681SAndroid Build Coastguard Worker ret i1 %2 62*9880d681SAndroid Build Coastguard Worker; CHECK: icmp ugt i32 %val, 3 63*9880d681SAndroid Build Coastguard Worker} 64