1 ; RUN: opt -S -mergefunc < %s | FileCheck %s 2 3 ; These two functions are identical. The basic block labels are the same, and 4 ; induce the same CFG. We are testing that block addresses within different 5 ; functions are compared by their value, and not based on order. Both functions 6 ; come from the same C-code, but in the first the two val_0/val_1 basic blocks 7 ; are in a different order (they were manually switched post-compilation). 8 9 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 10 target triple = "x86_64-unknown-linux-gnu" 11 12 define i32 @_Z1fi(i32 %i) #0 { 13 entry: 14 %i.addr = alloca i32, align 4 15 %ret = alloca i32, align 4 16 %l = alloca i8*, align 8 17 store i32 %i, i32* %i.addr, align 4 18 store i32 0, i32* %ret, align 4 19 store i8* blockaddress(@_Z1fi, %val_0), i8** %l, align 8 20 %0 = load i32, i32* %i.addr, align 4 21 %and = and i32 %0, 256 22 %cmp = icmp eq i32 %and, 0 23 br i1 %cmp, label %if.then, label %if.end 24 25 if.then: 26 store i8* blockaddress(@_Z1fi, %val_1), i8** %l, align 8 27 br label %if.end 28 29 if.end: 30 %1 = load i8*, i8** %l, align 8 31 br label %indirectgoto 32 33 val_1: 34 store i32 42, i32* %ret, align 4 35 br label %end 36 37 val_0: 38 store i32 12, i32* %ret, align 4 39 br label %end 40 41 42 end: 43 %2 = load i32, i32* %ret, align 4 44 ret i32 %2 45 46 indirectgoto: 47 %indirect.goto.dest = phi i8* [ %1, %if.end ] 48 indirectbr i8* %indirect.goto.dest, [label %val_0, label %val_1] 49 } 50 51 define i32 @_Z1gi(i32 %i) #0 { 52 ; CHECK-LABEL: define i32 @_Z1gi 53 ; CHECK-NEXT: tail call i32 @_Z1fi 54 ; CHECK-NEXT: ret 55 entry: 56 %i.addr = alloca i32, align 4 57 %ret = alloca i32, align 4 58 %l = alloca i8*, align 8 59 store i32 %i, i32* %i.addr, align 4 60 store i32 0, i32* %ret, align 4 61 store i8* blockaddress(@_Z1gi, %val_0), i8** %l, align 8 62 %0 = load i32, i32* %i.addr, align 4 63 %and = and i32 %0, 256 64 %cmp = icmp eq i32 %and, 0 65 br i1 %cmp, label %if.then, label %if.end 66 67 if.then: 68 store i8* blockaddress(@_Z1gi, %val_1), i8** %l, align 8 69 br label %if.end 70 71 if.end: 72 %1 = load i8*, i8** %l, align 8 73 br label %indirectgoto 74 75 val_0: 76 store i32 12, i32* %ret, align 4 77 br label %end 78 79 val_1: 80 store i32 42, i32* %ret, align 4 81 br label %end 82 83 end: 84 %2 = load i32, i32* %ret, align 4 85 ret i32 %2 86 87 indirectgoto: 88 %indirect.goto.dest = phi i8* [ %1, %if.end ] 89 indirectbr i8* %indirect.goto.dest, [label %val_0, label %val_1] 90 } 91 92
