d77c62053c
Summary: Byval requires allocating additional stack space, and always requires an implicit copy to be inserted in codegen, where it can be difficult to optimize. In this work, we use byref/IndirectAliased promotion method instead of byval with the implicit copy semantics. Reviewers: arsenm Differential Revision: https://reviews.llvm.org/D155986
18 lines
540 B
Common Lisp
18 lines
540 B
Common Lisp
// RUN: %clang_cc1 -emit-llvm -o - -triple i686-pc-darwin %s | FileCheck -check-prefix=X86 %s
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// RUN: %clang_cc1 -emit-llvm -o - -triple amdgcn %s | FileCheck -check-prefix=AMDGCN %s
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struct A {
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int x[100];
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};
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int f(struct A a);
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int g() {
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struct A a;
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// X86: call i32 @f(ptr noundef nonnull byval(%struct.A) align 4 %a)
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// AMDGCN: call i32 @f(ptr addrspace(5) noundef byref{{.*}}%a)
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return f(a);
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}
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// X86: declare i32 @f(ptr noundef byval(%struct.A) align 4)
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// AMDGCN: declare i32 @f(ptr addrspace(5) noundef byref{{.*}})
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