1 ; RUN: opt < %s -constprop -die -S | FileCheck %s 2 3 ; This is a basic sanity check for constant propagation. The add instruction 4 ; should be eliminated. 5 define i32 @test1(i1 %B) { 6 br i1 %B, label %BB1, label %BB2 7 8 BB1: 9 %Val = add i32 0, 0 10 br label %BB3 11 12 BB2: 13 br label %BB3 14 15 BB3: 16 ; CHECK: @test1 17 ; CHECK: %Ret = phi i32 [ 0, %BB1 ], [ 1, %BB2 ] 18 %Ret = phi i32 [ %Val, %BB1 ], [ 1, %BB2 ] 19 ret i32 %Ret 20 } 21 22 23 ; PR6197 24 define i1 @test2(i8* %f) nounwind { 25 entry: 26 %V = icmp ne i8* blockaddress(@test2, %bb), null 27 br label %bb 28 bb: 29 ret i1 %V 30 31 ; CHECK: @test2 32 ; CHECK: ret i1 true 33 } 34 35 define i1 @TNAN() { 36 ; CHECK: @TNAN 37 ; CHECK: ret i1 true 38 %A = fcmp uno double 0x7FF8000000000000, 1.000000e+00 39 %B = fcmp uno double 1.230000e+02, 1.000000e+00 40 %C = or i1 %A, %B 41 ret i1 %C 42 } 43
