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llvm-project/llvm/test/CodeGen/X86/rdpmc.ll

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[X86] Regenerate RDPMC intrinsic test llvm-svn: 322937
2018-01-19 20:05:58 +08:00
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown -mcpu=generic | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s --check-prefix=X64
[X86] Add support for builtin to read performance monitoring counters. This patch adds support for a new builtin instruction called __builtin_ia32_rdpmc. Builtin '__builtin_ia32_rdpmc' is defined as a 'GCC builtin'; on X86, it can be used to read performance monitoring counters. It takes as input the index of the performance counter to read, and returns the value of the specified performance counter as a 64-bit number. Calls to this new builtin will map to instruction RDPMC. The index in input to the builtin call is moved to register %ECX. The result of the builtin call is the value of the specified performance counter (RDPMC would return that quantity in registers RDX:RAX). This patch: - Adds builtin int_x86_rdpmc as a GCCBuiltin; - Adds a new x86 DAG node called 'RDPMC_DAG'; - Teaches how to lower this new builtin; - Adds an ISel pattern to select instruction RDPMC; - Fixes the definition of instruction RDPMC adding %RAX and %RDX as implicit definitions, and adding %ECX as implicit use; - Adds a LLVM test to verify that the new builtin is correctly selected. llvm-svn: 212049
2014-07-01 01:14:21 +08:00
; Verify that we correctly lower the "Read Performance-Monitoring Counters"
; x86 builtin.
define i64 @test_builtin_read_pmc(i32 %ID) {
[X86] Regenerate RDPMC intrinsic test llvm-svn: 322937
2018-01-19 20:05:58 +08:00
; X86-LABEL: test_builtin_read_pmc:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: rdpmc
; X86-NEXT: retl
;
; X64-LABEL: test_builtin_read_pmc:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: rdpmc
; X64-NEXT: shlq $32, %rdx
; X64-NEXT: orq %rdx, %rax
; X64-NEXT: retq
[X86] Add support for builtin to read performance monitoring counters. This patch adds support for a new builtin instruction called __builtin_ia32_rdpmc. Builtin '__builtin_ia32_rdpmc' is defined as a 'GCC builtin'; on X86, it can be used to read performance monitoring counters. It takes as input the index of the performance counter to read, and returns the value of the specified performance counter as a 64-bit number. Calls to this new builtin will map to instruction RDPMC. The index in input to the builtin call is moved to register %ECX. The result of the builtin call is the value of the specified performance counter (RDPMC would return that quantity in registers RDX:RAX). This patch: - Adds builtin int_x86_rdpmc as a GCCBuiltin; - Adds a new x86 DAG node called 'RDPMC_DAG'; - Teaches how to lower this new builtin; - Adds an ISel pattern to select instruction RDPMC; - Fixes the definition of instruction RDPMC adding %RAX and %RDX as implicit definitions, and adding %ECX as implicit use; - Adds a LLVM test to verify that the new builtin is correctly selected. llvm-svn: 212049
2014-07-01 01:14:21 +08:00
%1 = tail call i64 @llvm.x86.rdpmc(i32 %ID)
ret i64 %1
}
declare i64 @llvm.x86.rdpmc(i32 %ID)