Author: ctopper Date: Fri Sep 7 12:14:24 2018 New Revision: 341699 URL: http://llvm.org/viewvc/llvm-project?rev=341699&view=rev Log: [X86] Custom emit __builtin_rdtscp so we can emit an explicit store for the out parameter
This is the clang side of D51803. The llvm intrinsic now returns two results. So we need to emit an explicit store in IR for the out parameter. This is similar to addcarry/subborrow/rdrand/rdseed. Differential Revision: https://reviews.llvm.org/D51805 Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp cfe/trunk/test/CodeGen/rd-builtins.c Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=341699&r1=341698&r2=341699&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original) +++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Fri Sep 7 12:14:24 2018 @@ -9158,6 +9158,12 @@ Value *CodeGenFunction::EmitX86BuiltinEx case X86::BI__rdtsc: { return Builder.CreateCall(CGM.getIntrinsic(Intrinsic::x86_rdtsc)); } + case X86::BI__builtin_ia32_rdtscp: { + Value *Call = Builder.CreateCall(CGM.getIntrinsic(Intrinsic::x86_rdtscp)); + Builder.CreateDefaultAlignedStore(Builder.CreateExtractValue(Call, 1), + Ops[0]); + return Builder.CreateExtractValue(Call, 0); + } case X86::BI__builtin_ia32_undef128: case X86::BI__builtin_ia32_undef256: case X86::BI__builtin_ia32_undef512: Modified: cfe/trunk/test/CodeGen/rd-builtins.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/rd-builtins.c?rev=341699&r1=341698&r2=341699&view=diff ============================================================================== --- cfe/trunk/test/CodeGen/rd-builtins.c (original) +++ cfe/trunk/test/CodeGen/rd-builtins.c Fri Sep 7 12:14:24 2018 @@ -14,3 +14,12 @@ int test_rdtsc() { // CHECK: @test_rdtsc // CHECK: call i64 @llvm.x86.rdtsc } + +unsigned long long test_rdtscp(unsigned int *a) { +// CHECK: @test_rdtscp +// CHECK: [[RDTSCP:%.*]] = call { i64, i32 } @llvm.x86.rdtscp +// CHECK: [[TSC_AUX:%.*]] = extractvalue { i64, i32 } [[RDTSCP]], 1 +// CHECK: store i32 [[TSC_AUX]], i32* %{{.*}} +// CHECK: [[TSC:%.*]] = extractvalue { i64, i32 } [[RDTSCP]], 0 + return __rdtscp(a); +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
