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e741916330
Basic block sections enables function sections implicitly, this is not needed and is inefficient with "=list" option. We had basic block sections enable function sections implicitly in clang. This is particularly inefficient with "=list" option as it places functions that do not have any basic block sections in separate sections. This causes unnecessary object file overhead for large applications. This patch disables this implicit behavior. It only creates function sections for those functions that require basic block sections. This patch is the second of two patches and this patch removes the implicit enabling of function sections with basic block sections in clang. Differential Revision: https://reviews.llvm.org/D93876
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 -triple x86_64 -S -o - < %s | FileCheck %s --check-prefix=PLAIN
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// RUN: %clang_cc1 -triple x86_64 -S -fbasic-block-sections=all -fbasic-block-sections=none -o - < %s | FileCheck %s --check-prefix=PLAIN
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// RUN: %clang_cc1 -triple x86_64 -S -fbasic-block-sections=all -o - < %s | FileCheck %s --check-prefix=BB_WORLD --check-prefix=BB_ALL
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// RUN: %clang_cc1 -triple x86_64 -S -fbasic-block-sections=list=%S/Inputs/basic-block-sections.funcnames -o - < %s | FileCheck %s --check-prefix=BB_WORLD --check-prefix=BB_LIST
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// RUN: %clang_cc1 -triple x86_64 -S -fbasic-block-sections=all -funique-basic-block-section-names -o - < %s | FileCheck %s --check-prefix=UNIQUE
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// RUN: rm -f %t
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// RUN: not %clang_cc1 -fbasic-block-sections=list= -emit-obj -o %t %s 2>&1 | FileCheck -DMSG=%errc_ENOENT %s --check-prefix=ERROR
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// RUN: not ls %t
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int world(int a) {
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if (a > 10)
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return 10;
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else if (a > 5)
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return 5;
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else
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return 0;
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}
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int another(int a) {
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if (a > 10)
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return 20;
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return 0;
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}
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// PLAIN-NOT: section
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// PLAIN: world:
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//
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// BB_WORLD: .section .text.world,"ax",@progbits{{$}}
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// BB_WORLD: world:
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// BB_WORLD: .section .text.world,"ax",@progbits,unique
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// BB_WORLD: world.__part.1:
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// BB_ALL: .section .text.another,"ax",@progbits
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// BB_ALL: another.__part.1:
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// BB_LIST-NOT: .section .text.another,"ax",@progbits
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// BB_LIST: another:
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// BB_LIST-NOT: another.__part.1:
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//
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// UNIQUE: .section .text.world.world.__part.1,
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// UNIQUE: .section .text.another.another.__part.1,
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// ERROR: error: unable to load basic block sections function list: '[[MSG]]'
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