diff options
| -rw-r--r-- | lib/CodeGen/TargetInfo.cpp | 4 | ||||
| -rw-r--r-- | test/CodeGenCXX/regparm.cpp | 13 |
2 files changed, 16 insertions, 1 deletions
diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp index a9e11cb954..6a929a17cc 100644 --- a/lib/CodeGen/TargetInfo.cpp +++ b/lib/CodeGen/TargetInfo.cpp @@ -810,6 +810,10 @@ bool X86_32ABIInfo::shouldUseInReg(QualType Ty, unsigned &FreeRegs) const { return false; unsigned SizeInRegs = (getContext().getTypeSize(Ty) + 31) / 32; + + if (SizeInRegs == 0) + return false; + if (SizeInRegs > FreeRegs) { FreeRegs = 0; return false; diff --git a/test/CodeGenCXX/regparm.cpp b/test/CodeGenCXX/regparm.cpp index 07e9aa046e..2196c798bf 100644 --- a/test/CodeGenCXX/regparm.cpp +++ b/test/CodeGenCXX/regparm.cpp @@ -21,7 +21,18 @@ struct S2 { }; void __attribute__((regparm(3))) foo3(struct S2 a, int b); -// declare void @_Z4foo12S1i(i32 inreg, i32 inreg) optsize +// CHECK: declare void @_Z4foo32S2i(i32 inreg, i32 inreg) void bar3(struct S2 a, int b) { foo3(a, b); } + +struct S3 { + struct { + struct {} b[0]; + } a; +}; +__attribute((regparm(2))) void foo4(S3 a, int b); +// CHECK: declare void @_Z4foo42S3i(%struct.S3* byval align 4, i32 inreg) +void bar3(S3 a, int b) { + foo4(a, b); +} |