1; Check constant propagation in thinlto combined summary. This allows us to do 2 things: 2; 1. Internalize global definition which is not used externally if all accesses to it are read-only 3; 2. Make a local copy of internal definition if all accesses to it are readonly. This allows constant 4; folding it during optimziation phase. 5; RUN: opt -module-summary %s -o %t1.bc 6; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc 7; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \ 8; RUN: -r=%t2.bc,foo,pl \ 9; RUN: -r=%t2.bc,bar,pl \ 10; RUN: -r=%t2.bc,baz,pl \ 11; RUN: -r=%t2.bc,rand, \ 12; RUN: -r=%t2.bc,gBar,pl \ 13; RUN: -r=%t1.bc,main,plx \ 14; RUN: -r=%t1.bc,main2,pl \ 15; RUN: -r=%t1.bc,foo, \ 16; RUN: -r=%t1.bc,bar, \ 17; RUN: -r=%t1.bc,baz, \ 18; RUN: -r=%t1.bc,gBar, \ 19; RUN: -o %t3 20; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT 21; RUN: llvm-dis %t3.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN 22 23; Now check that we won't internalize global (gBar) if it's externally referenced 24; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \ 25; RUN: -r=%t2.bc,foo,pl \ 26; RUN: -r=%t2.bc,bar,pl \ 27; RUN: -r=%t2.bc,baz,pl \ 28; RUN: -r=%t2.bc,rand, \ 29; RUN: -r=%t2.bc,gBar,plx \ 30; RUN: -r=%t1.bc,main,plx \ 31; RUN: -r=%t1.bc,main2,pl \ 32; RUN: -r=%t1.bc,foo, \ 33; RUN: -r=%t1.bc,bar, \ 34; RUN: -r=%t1.bc,baz, \ 35; RUN: -r=%t1.bc,gBar, \ 36; RUN: -o %t4 37; RUN: llvm-dis %t4.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT2 38 39; Run again but with main2 exported instead of main to check that write only 40; variables are optimized out. 41; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \ 42; RUN: -r=%t2.bc,foo,pl \ 43; RUN: -r=%t2.bc,bar,pl \ 44; RUN: -r=%t2.bc,baz,pl \ 45; RUN: -r=%t2.bc,rand, \ 46; RUN: -r=%t2.bc,gBar,pl \ 47; RUN: -r=%t1.bc,main,pl \ 48; RUN: -r=%t1.bc,main2,plx \ 49; RUN: -r=%t1.bc,foo, \ 50; RUN: -r=%t1.bc,bar, \ 51; RUN: -r=%t1.bc,baz, \ 52; RUN: -r=%t1.bc,gBar, \ 53; RUN: -o %t5 54; RUN: llvm-dis %t5.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT-WRITEONLY 55; RUN: llvm-dis %t5.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2 56; Check that gFoo and gBar were eliminated from source module together 57; with corresponsing stores 58; RUN: llvm-dis %t5.2.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2-SRC 59 60; IMPORT: @gBar = internal local_unnamed_addr global i32 2, align 4 61; IMPORT-NEXT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4 62; IMPORT: !DICompileUnit({{.*}}) 63 64; Write only variables are imported with a zero initializer. 65; IMPORT-WRITEONLY: @gBar = internal local_unnamed_addr global i32 0 66; IMPORT-WRITEONLY: @gFoo.llvm.0 = internal unnamed_addr global i32 0 67 68; CODEGEN: i32 @main() 69; CODEGEN-NEXT: ret i32 3 70 71; IMPORT2: @gBar = available_externally local_unnamed_addr global i32 2, align 4 72 73; CODEGEN2: i32 @main2 74; CODEGEN2-NEXT: %1 = tail call i32 @rand() 75; CODEGEN2-NEXT: %2 = tail call i32 @rand() 76; CODEGEN2-NEXT: ret i32 0 77 78; CODEGEN2-SRC: void @baz() 79; CODEGEN2-SRC-NEXT: %1 = tail call i32 @rand() 80; CODEGEN2-SRC-NEXT: %2 = tail call i32 @rand() 81; CODEGEN2-SRC-NEXT: ret void 82 83target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 84target triple = "x86_64-pc-linux-gnu" 85 86; We should be able to link external definition of gBar to its declaration 87@gBar = external global i32 88 89define i32 @main() local_unnamed_addr { 90 %call = tail call i32 @foo() 91 %call1 = tail call i32 @bar() 92 %add = add nsw i32 %call1, %call 93 ret i32 %add 94} 95 96define i32 @main2() local_unnamed_addr { 97 tail call void @baz() 98 ret i32 0 99} 100 101declare i32 @foo(...) local_unnamed_addr 102 103declare i32 @bar(...) local_unnamed_addr 104 105declare void @baz() local_unnamed_addr 106