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