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b0f10a1dc3
Close https://github.com/llvm/llvm-project/issues/93497 The root cause of the problem is, we mark the variable from other modules as constnant in LLVM incorrectly. This patch fixes this problem by not emitting the defintition for non-const available external variables. Since the non const available externally variable is not helpful to the optimization.
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// RUN: rm -rf %t
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// RUN: mkdir %t
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// RUN: split-file %s %t
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface -triple %itanium_abi_triple %t/parta.cppm -o %t/mod-parta.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface -triple %itanium_abi_triple %t/partb.cppm -o %t/mod-partb.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface -triple %itanium_abi_triple %t/mod.cppm \
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// RUN: -fprebuilt-module-path=%t -o %t/mod.pcm
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// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/mod.pcm -emit-llvm -disable-llvm-passes -o - \
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// RUN: -fprebuilt-module-path=%t | FileCheck %t/mod.cppm
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// RUN: %clang_cc1 -std=c++20 -O2 -emit-module-interface -triple %itanium_abi_triple \
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// RUN: -fprebuilt-module-path=%t %t/mod.cppm -o %t/mod.pcm
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// RUN: %clang_cc1 -std=c++20 -O2 -triple %itanium_abi_triple %t/mod.pcm -emit-llvm \
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// RUN: -fprebuilt-module-path=%t -disable-llvm-passes -o - | FileCheck %t/mod.cppm -check-prefix=CHECK-OPT
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//--- parta.cppm
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export module mod:parta;
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export int a = 43;
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export int foo() {
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return 3 + a;
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}
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//--- partb.cppm
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module mod:partb;
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int b = 43;
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int bar() {
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return 43 + b;
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}
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//--- mod.cppm
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export module mod;
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import :parta;
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import :partb;
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export int use() {
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return foo() + bar() + a + b;
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}
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// FIXME: The definition of the variables shouldn't be exported too.
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// CHECK: @_ZW3mod1a = external global
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// CHECK: @_ZW3mod1b = external global
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// CHECK: declare{{.*}} i32 @_ZW3mod3foov
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// CHECK: declare{{.*}} i32 @_ZW3mod3barv
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// CHECK-OPT: @_ZW3mod1a = external global
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// CHECK-OPT: @_ZW3mod1b = external global
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// CHECK-OPT: declare{{.*}} i32 @_ZW3mod3foov
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// CHECK-OPT: declare{{.*}} i32 @_ZW3mod3barv
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