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llvm/test/CodeGen/X86/rdtsc.ll

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[X86] Add support for Read Time Stamp Counter x86 builtin intrinsics. This patch: - Adds two new X86 builtin intrinsics ('int_x86_rdtsc' and 'int_x86_rdtscp') as GCCBuiltin intrinsics; - Teaches the backend how to lower the two new builtins; - Introduces a common function to lower READCYCLECOUNTER dag nodes and the two new rdtsc/rdtscp intrinsics; - Improves (and extends) the existing x86 test 'rdtsc.ll'; now test 'rdtsc.ll' correctly verifies that both READCYCLECOUNTER and the two new intrinsics work fine for both 64bit and 32bit Subtargets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207127 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 17:18:27 +00:00
; 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).
check that rdtsc is generated from readcyclecounter git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24431 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-20 21:41:59 +00:00
[X86] Add support for Read Time Stamp Counter x86 builtin intrinsics. This patch: - Adds two new X86 builtin intrinsics ('int_x86_rdtsc' and 'int_x86_rdtscp') as GCCBuiltin intrinsics; - Teaches the backend how to lower the two new builtins; - Introduces a common function to lower READCYCLECOUNTER dag nodes and the two new rdtsc/rdtscp intrinsics; - Improves (and extends) the existing x86 test 'rdtsc.ll'; now test 'rdtsc.ll' correctly verifies that both READCYCLECOUNTER and the two new intrinsics work fine for both 64bit and 32bit Subtargets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207127 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 17:18:27 +00:00
define i64 @test_builtin_rdtsc() {
%1 = tail call i64 @llvm.x86.rdtsc()
ret i64 %1
check that rdtsc is generated from readcyclecounter git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24431 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-20 21:41:59 +00:00
}
[X86] Add support for Read Time Stamp Counter x86 builtin intrinsics. This patch: - Adds two new X86 builtin intrinsics ('int_x86_rdtsc' and 'int_x86_rdtscp') as GCCBuiltin intrinsics; - Teaches the backend how to lower the two new builtins; - Introduces a common function to lower READCYCLECOUNTER dag nodes and the two new rdtsc/rdtscp intrinsics; - Improves (and extends) the existing x86 test 'rdtsc.ll'; now test 'rdtsc.ll' correctly verifies that both READCYCLECOUNTER and the two new intrinsics work fine for both 64bit and 32bit Subtargets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207127 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 17:18:27 +00:00
; 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
Fix rdtsc.ll test to match r8 on win64 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207142 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 20:14:08 +00:00
; CHECK: movl %ecx, (%{{[a-z0-9]+}})
[X86] Add support for Read Time Stamp Counter x86 builtin intrinsics. This patch: - Adds two new X86 builtin intrinsics ('int_x86_rdtsc' and 'int_x86_rdtscp') as GCCBuiltin intrinsics; - Teaches the backend how to lower the two new builtins; - Introduces a common function to lower READCYCLECOUNTER dag nodes and the two new rdtsc/rdtscp intrinsics; - Improves (and extends) the existing x86 test 'rdtsc.ll'; now test 'rdtsc.ll' correctly verifies that both READCYCLECOUNTER and the two new intrinsics work fine for both 64bit and 32bit Subtargets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207127 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 17:18:27 +00:00
; X86-NOT: shlq
; CHECK: ret
declare i64 @llvm.readcyclecounter()
declare i64 @llvm.x86.rdtscp(i8*)
declare i64 @llvm.x86.rdtsc()
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