1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
38 lines
1.7 KiB
C++
38 lines
1.7 KiB
C++
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck --check-prefixes=CHECK,LINUX_AIX %s
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// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple powerpc64-unknown-aix-xcoff | FileCheck --check-prefixes=CHECK,LINUX_AIX %s
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// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-apple-darwin12 | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
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int &f();
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// LINUX_AIX: @r ={{.*}} thread_local global i32* null
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// DARWIN: @r = internal thread_local global i32* null
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thread_local int &r = f();
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// LINUX_AIX: @_ZTH1r ={{.*}} alias void (), void ()* @__tls_init
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// DARWIN: @_ZTH1r = internal alias void (), void ()* @__tls_init
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int &g() { return r; }
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// CHECK: define {{.*}} @[[R_INIT:.*]]()
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// CHECK: call noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i32* @_Z1fv()
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// CHECK: store i32* %{{.*}}, i32** @r, align 8
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// CHECK-LABEL: define{{.*}} nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i32* @_Z1gv()
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// LINUX_AIX: call i32* @_ZTW1r()
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// DARWIN: call cxx_fast_tlscc i32* @_ZTW1r()
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// CHECK: ret i32* %{{.*}}
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// LINUX_AIX: define weak_odr hidden noundef i32* @_ZTW1r() [[ATTR0:#[0-9]+]]{{( comdat)?}} {
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// DARWIN: define cxx_fast_tlscc noundef i32* @_ZTW1r() [[ATTR1:#[0-9]+]] {
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// LINUX_AIX: call void @_ZTH1r()
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// DARWIN: call cxx_fast_tlscc void @_ZTH1r()
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// CHECK: load i32*, i32** @r, align 8
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// CHECK: ret i32* %{{.*}}
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// LINUX_AIX-LABEL: define internal void @__tls_init()
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// DARWIN-LABEL: define internal cxx_fast_tlscc void @__tls_init()
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// CHECK: call void @[[R_INIT]]()
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// LINUX_AIX: attributes [[ATTR0]] = { {{.*}}"target-features"{{.*}} }
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// DARWIN: attributes [[ATTR1]] = { {{.*}}nounwind{{.*}}"target-features"{{.*}} }
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