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Fix handling of vector return types.

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A vector should be returned via the hidden pointer argument except if its size
is equal to or smaller than 16-bytes and the target ABI is N32 or N64.

llvm-svn: 156642
This commit is contained in:
Akira Hatanaka
2012-05-11 21:01:17 +00:00
parent 1a96ef800b
commit c37eddf7a7
2 changed files with 22 additions and 1 deletions
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2
clang/lib/CodeGen/TargetInfo.cpp
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@@ -3360,7 +3360,7 @@ ABIArgInfo MipsABIInfo::classifyReturnType(QualType RetTy) const {
if (RetTy->isVoidType() || Size == 0)
return ABIArgInfo::getIgnore();
if (isAggregateTypeForABI(RetTy)) {
if (isAggregateTypeForABI(RetTy) || RetTy->isVectorType()) {
if (Size <= 128) {
if (RetTy->isAnyComplexType())
return ABIArgInfo::getDirect();

21
clang/test/CodeGen/mips-vector-return.c Normal file
View File

@@ -0,0 +1,21 @@
// RUN: %clang -target mipsel-unknown-linux -ccc-clang-archs mipsel -O3 -S -o - -emit-llvm %s | FileCheck %s -check-prefix=O32
// RUN: %clang -target mips64el-unknown-linux -ccc-clang-archs mips64el -O3 -S -mabi=n64 -o - -emit-llvm %s | FileCheck %s -check-prefix=N64
// vectors larger than 16-bytes are returned via the hidden pointer argument.
// N64/N32 returns vectors whose size is equal to or smaller than 16-bytes in
// integer registers.
typedef float v4sf __attribute__ ((__vector_size__ (16)));
typedef double v4df __attribute__ ((__vector_size__ (32)));
// O32: define void @test_v4sf(<4 x float>* noalias nocapture sret
// N64: define { i64, i64 } @test_v4sf
v4sf test_v4sf(float a) {
return (v4sf){0.0f, a, 0.0f, 0.0f};
}
// O32: define void @test_v4df(<4 x double>* noalias nocapture sret
// N64: define void @test_v4df(<4 x double>* noalias nocapture sret
v4df test_v4df(double a) {
return (v4df){0.0, a, 0.0, 0.0};
}