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; RUN: llc < %s -march=x86-64 -mcpu=generic | FileCheck %s
; RUN: llc < %s -march=x86 -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()
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