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llvm-project/clang/test/CodeGen/mips-zero-sized-struct.c

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[mips] Zero-sized structs cannot be ignored in MipsABIInfo::classifyReturnType() for O32 Summary: They are returned indirectly which causes the other arguments to move to the next argument slot. With this, utils/ABITest does not discover any failing cases in the first 500 attempts on big/little endian for O32. Previously some of these failed. Also tested N32/N64 little endian (big endian has other known issues) with no issues. Reviewers: atanasyan Reviewed By: atanasyan Subscribers: atanasyan, cfe-commits Differential Revision: http://reviews.llvm.org/D4811 llvm-svn: 217147
2014-09-04 21:28:14 +08:00
// RUN: %clang -target mips-unknown-linux-gnu -S -emit-llvm -o - %s | FileCheck -check-prefix=O32 %s
// RUN: %clang -target mipsel-unknown-linux-gnu -S -emit-llvm -o - %s | FileCheck -check-prefix=O32 %s
// RUN: %clang -target mips64-unknown-linux-gnu -S -emit-llvm -o - %s -mabi=n32 | FileCheck -check-prefix=N32 %s
// RUN: %clang -target mips64el-unknown-linux-gnu -S -emit-llvm -o - %s -mabi=n32 | FileCheck -check-prefix=N32 %s
// RUN: %clang -target mips64-unknown-linux-gnu -S -emit-llvm -o - %s | FileCheck -check-prefix=N64 %s
// RUN: %clang -target mips64el-unknown-linux-gnu -S -emit-llvm -o - %s | FileCheck -check-prefix=N64 %s
// O32: define void @fn28(%struct.T2* noalias sret %agg.result, i8 signext %arg0)
// N32: define void @fn28(i8 signext %arg0)
// N64: define void @fn28(i8 signext %arg0)
typedef struct T2 { } T2;
T2 T2_retval;
T2 fn28(char arg0) {
return T2_retval;
}