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( 8define 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( 16define 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( 24define 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( 32define 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( 40define 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( 48define 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( 58define 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