| ; RUN: llc < %s -mtriple=x86_64-- -mcpu=generic | FileCheck %s |
| ; RUN: llc < %s -mtriple=i686-- -mcpu=generic | FileCheck %s --check-prefix=CHECK --check-prefix=X86 |
| |
| ; Verify that we correctly lower ISD::READCYCLECOUNTER. |
| |
| |
| define i64 @test_builtin_readcyclecounter() { |
| %1 = tail call i64 @llvm.readcyclecounter() |
| ret i64 %1 |
| } |
| ; CHECK-LABEL: test_builtin_readcyclecounter |
| ; CHECK: rdtsc |
| ; X86-NOT: shlq |
| ; X86-NOT: or |
| ; CHECK-NOT: mov |
| ; CHECK: ret |
| |
| |
| ; Verify that we correctly lower the Read Cycle Counter GCC x86 builtins |
| ; (i.e. RDTSC and RDTSCP). |
| |
| define i64 @test_builtin_rdtsc() { |
| %1 = tail call i64 @llvm.x86.rdtsc() |
| ret i64 %1 |
| } |
| ; CHECK-LABEL: test_builtin_rdtsc |
| ; CHECK: rdtsc |
| ; X86-NOT: shlq |
| ; X86-NOT: or |
| ; CHECK-NOT: mov |
| ; CHECK: ret |
| |
| |
| define i64 @test_builtin_rdtscp(i8* %A) { |
| %1 = tail call i64 @llvm.x86.rdtscp(i8* %A) |
| ret i64 %1 |
| } |
| ; CHECK-LABEL: test_builtin_rdtscp |
| ; CHECK: rdtscp |
| ; X86-NOT: shlq |
| ; CHECK: movl %ecx, (%{{[a-z0-9]+}}) |
| ; X86-NOT: shlq |
| ; CHECK: ret |
| |
| |
| declare i64 @llvm.readcyclecounter() |
| declare i64 @llvm.x86.rdtscp(i8*) |
| declare i64 @llvm.x86.rdtsc() |
| |
