1; RUN: opt < %s -indvars -S | FileCheck %s 2define void @test1() nounwind { 3entry: 4 br label %bb 5 6bb: ; preds = %bb, %entry 7 %x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ] ; <double> [#uses=2] 8 %0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind ; <i32> [#uses=0] 9 %1 = fadd double %x.0.reg2mem.0, 1.000000e+00 ; <double> [#uses=2] 10 %2 = fcmp olt double %1, 1.000000e+04 ; <i1> [#uses=1] 11 br i1 %2, label %bb, label %return 12 13return: ; preds = %bb 14 ret void 15; CHECK-LABEL: @test1( 16; CHECK: icmp 17} 18 19declare i32 @foo(double) 20 21define void @test2() nounwind { 22entry: 23 br label %bb 24 25bb: ; preds = %bb, %entry 26 %x.0.reg2mem.0 = phi double [ -10.000000e+00, %entry ], [ %1, %bb ] ; <double> [#uses=2] 27 %0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind ; <i32> [#uses=0] 28 %1 = fadd double %x.0.reg2mem.0, 2.000000e+00 ; <double> [#uses=2] 29 %2 = fcmp olt double %1, -1.000000e+00 ; <i1> [#uses=1] 30 br i1 %2, label %bb, label %return 31 32return: ; preds = %bb 33 ret void 34; CHECK-LABEL: @test2( 35; CHECK: icmp 36} 37 38 39define void @test3() nounwind { 40entry: 41 br label %bb 42 43bb: ; preds = %bb, %entry 44 %x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ] 45 %0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind 46 %1 = fadd double %x.0.reg2mem.0, 1.000000e+00 47 %2 = fcmp olt double %1, -1.000000e+00 48 br i1 %2, label %bb, label %return 49 50return: 51 ret void 52; CHECK-LABEL: @test3( 53; CHECK: fcmp 54} 55 56define void @test4() nounwind { 57entry: 58 br label %bb 59 60bb: ; preds = %bb, %entry 61 %x.0.reg2mem.0 = phi double [ 40.000000e+00, %entry ], [ %1, %bb ] ; <double> [#uses=2] 62 %0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind ; <i32> [#uses=0] 63 %1 = fadd double %x.0.reg2mem.0, -1.000000e+00 ; <double> [#uses=2] 64 %2 = fcmp olt double %1, 1.000000e+00 ; <i1> [#uses=1] 65 br i1 %2, label %bb, label %return 66 67return: 68 ret void 69; CHECK-LABEL: @test4( 70; CHECK-NOT: cmp 71; CHECK: br i1 false 72} 73 74; PR6761 75define void @test5() nounwind { 76; <label>:0 77 br label %1 78 79; <label>:1 ; preds = %1, %0 80 %2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ] ; <double> [#uses=1] 81 %3 = tail call i32 @foo(double 0.0) ; <i32> [#uses=0] 82 %4 = fadd double %2, -1.000000e+00 ; <double> [#uses=2] 83 %5 = fcmp ult double %4, 0.000000e+00 ; <i1> [#uses=1] 84 br i1 %5, label %exit, label %1 85 86exit: 87 ret void 88 89; CHECK-LABEL: @test5( 90; CHECK: icmp slt i32 {{.*}}, 0 91; CHECK-NEXT: br i1 92} 93