1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 define void @test1() nounwind { 3 entry: 4 br label %bb 5 6 bb: ; 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 13 return: ; preds = %bb 14 ret void 15 ; CHECK-LABEL: @test1( 16 ; CHECK: icmp 17 } 18 19 declare i32 @foo(double) 20 21 define void @test2() nounwind { 22 entry: 23 br label %bb 24 25 bb: ; 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 32 return: ; preds = %bb 33 ret void 34 ; CHECK-LABEL: @test2( 35 ; CHECK: icmp 36 } 37 38 39 define void @test3() nounwind { 40 entry: 41 br label %bb 42 43 bb: ; 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 50 return: 51 ret void 52 ; CHECK-LABEL: @test3( 53 ; CHECK: fcmp 54 } 55 56 define void @test4() nounwind { 57 entry: 58 br label %bb 59 60 bb: ; 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 67 return: 68 ret void 69 ; CHECK-LABEL: @test4( 70 ; CHECK-NOT: cmp 71 ; CHECK: br i1 false 72 } 73 74 ; PR6761 75 define 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 86 exit: 87 ret void 88 89 ; CHECK-LABEL: @test5( 90 ; CHECK: icmp slt i32 {{.*}}, 0 91 ; CHECK-NEXT: br i1 92 } 93
