diff options
Diffstat (limited to 'llvm/test/ThinLTO/X86/writeonly2.ll')
| -rw-r--r-- | llvm/test/ThinLTO/X86/writeonly2.ll | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/llvm/test/ThinLTO/X86/writeonly2.ll b/llvm/test/ThinLTO/X86/writeonly2.ll new file mode 100644 index 00000000000..b1e53ba47b5 --- /dev/null +++ b/llvm/test/ThinLTO/X86/writeonly2.ll @@ -0,0 +1,50 @@ +; Check that we optimize out writeonly variables and corresponding stores. +; This test uses llvm-lto2 + +; RUN: opt -module-summary %s -o %t1.bc +; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc +; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \ +; RUN: -r=%t2.bc,foo,pl \ +; RUN: -r=%t2.bc,bar,pl \ +; RUN: -r=%t2.bc,baz,pl \ +; RUN: -r=%t2.bc,rand, \ +; RUN: -r=%t2.bc,gBar,pl \ +; RUN: -r=%t1.bc,main,plx \ +; RUN: -r=%t1.bc,baz, \ +; RUN: -r=%t1.bc,gBar, \ +; RUN: -o %t3 +; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT +; RUN: llvm-dis %t3.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN +; Check that gFoo and gBar were eliminated from source module together +; with corresponsing stores +; RUN: llvm-dis %t3.2.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN-SRC + +; IMPORT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4 +; IMPORT-NEXT: @gBar = internal local_unnamed_addr global i32 2, align 4 +; IMPORT: !DICompileUnit({{.*}}) + +; CODEGEN-NOT: gFoo +; CODEGEN-NOT: gBar +; CODEGEN: i32 @main +; CODEGEN-NEXT: %1 = tail call i32 @rand() +; CODEGEN-NEXT: %2 = tail call i32 @rand() +; CODEGEN-NEXT: ret i32 0 + +; CODEGEN-SRC-NOT: gFoo +; CODEGEN-SRC-NOT: gBar +; CODEGEN-SRC: void @baz() +; CODEGEN-SRC-NEXT: %1 = tail call i32 @rand() +; CODEGEN-SRC-NEXT: %2 = tail call i32 @rand() +; CODEGEN-SRC-NEXT: ret void + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-pc-linux-gnu" + +; We should be able to link external definition of gBar to its declaration +@gBar = external global i32 + +define i32 @main() local_unnamed_addr { + tail call void @baz() + ret i32 0 +} +declare void @baz() local_unnamed_addr |
