[llvm] [RISCV] Support PreserveMost calling convention (PR #148214)
Pengcheng Wang via llvm-commits
llvm-commits at lists.llvm.org
Mon Jul 14 20:47:26 PDT 2025
https://github.com/wangpc-pp updated https://github.com/llvm/llvm-project/pull/148214
>From e3a2e57718e4176606580fc6ca8a7b9b0d0ffd5c Mon Sep 17 00:00:00 2001
From: Pengcheng Wang <wangpengcheng.pp at bytedance.com>
Date: Fri, 11 Jul 2025 18:55:49 +0800
Subject: [PATCH 1/2] [RISCV] Support PreserveMost calling convention
This adds the simplest implementation of `PreserveMost` calling
convention and we preserve `x5-x31` registers.
Fixes #148147.
---
llvm/docs/LangRef.rst | 2 +
llvm/lib/Target/RISCV/RISCVCallingConv.td | 2 +
llvm/lib/Target/RISCV/RISCVISelLowering.cpp | 1 +
llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp | 2 +
.../RISCV/calling-conv-preserve-most.ll | 165 ++++++++++++++++++
5 files changed, 172 insertions(+)
create mode 100644 llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
index d2a1821efd698..40688d72870fb 100644
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -413,6 +413,8 @@ added in the future:
- On AArch64 the callee preserve all general purpose registers, except
X0-X8 and X16-X18. Not allowed with ``nest``.
+ - On RISC-V the callee preserve x5-x31 registers.
+
The idea behind this convention is to support calls to runtime functions
that have a hot path and a cold path. The hot path is usually a small piece
of code that doesn't use many registers. The cold path might need to call out to
diff --git a/llvm/lib/Target/RISCV/RISCVCallingConv.td b/llvm/lib/Target/RISCV/RISCVCallingConv.td
index cbf039edec273..90e5019019bed 100644
--- a/llvm/lib/Target/RISCV/RISCVCallingConv.td
+++ b/llvm/lib/Target/RISCV/RISCVCallingConv.td
@@ -93,3 +93,5 @@ def CSR_XLEN_F32_V_Interrupt_RVE: CalleeSavedRegs<(sub CSR_XLEN_F32_V_Interrupt,
// Same as CSR_XLEN_F64_V_Interrupt, but excluding X16-X31.
def CSR_XLEN_F64_V_Interrupt_RVE: CalleeSavedRegs<(sub CSR_XLEN_F64_V_Interrupt,
(sequence "X%u", 16, 31))>;
+
+def CSR_RT_MostRegs : CalleeSavedRegs<(add (sequence "X%u", 5, 31))>;
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 456f3aedbf034..6feb53202b7f2 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -22205,6 +22205,7 @@ SDValue RISCVTargetLowering::LowerFormalArguments(
case CallingConv::C:
case CallingConv::Fast:
case CallingConv::SPIR_KERNEL:
+ case CallingConv::PreserveMost:
case CallingConv::GRAAL:
case CallingConv::RISCV_VectorCall:
#define CC_VLS_CASE(ABI_VLEN) case CallingConv::RISCV_VLSCall_##ABI_VLEN:
diff --git a/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp b/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
index 540412366026b..44c7ca3587cc1 100644
--- a/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
@@ -68,6 +68,8 @@ RISCVRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
auto &Subtarget = MF->getSubtarget<RISCVSubtarget>();
if (MF->getFunction().getCallingConv() == CallingConv::GHC)
return CSR_NoRegs_SaveList;
+ if (MF->getFunction().getCallingConv() == CallingConv::PreserveMost)
+ return CSR_RT_MostRegs_SaveList;
if (MF->getFunction().hasFnAttribute("interrupt")) {
if (Subtarget.hasVInstructions()) {
if (Subtarget.hasStdExtD())
diff --git a/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll b/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
new file mode 100644
index 0000000000000..a0345363601a5
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
@@ -0,0 +1,165 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 < %s | FileCheck %s -check-prefix=RV32
+; RUN: llc -mtriple=riscv64 < %s | FileCheck %s -check-prefix=RV64
+
+; Check the PreserveMost calling convention works.
+
+declare void @standard_cc_func()
+declare preserve_mostcc void @preserve_mostcc_func()
+
+define preserve_mostcc void @preserve_mostcc1() nounwind {
+; RV32-LABEL: preserve_mostcc1:
+; RV32: # %bb.0: # %entry
+; RV32-NEXT: addi sp, sp, -64
+; RV32-NEXT: sw t0, 60(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t1, 56(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t2, 52(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a0, 48(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a1, 44(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a2, 40(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a3, 36(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a4, 32(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a5, 28(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a6, 24(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a7, 20(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t3, 16(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t4, 12(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t5, 8(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t6, 4(sp) # 4-byte Folded Spill
+; RV32-NEXT: call standard_cc_func
+; RV32-NEXT: lw t0, 60(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t1, 56(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t2, 52(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a0, 48(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a1, 44(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a2, 40(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a3, 36(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a4, 32(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a5, 28(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a6, 24(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a7, 20(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t3, 16(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t4, 12(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t5, 8(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t6, 4(sp) # 4-byte Folded Reload
+; RV32-NEXT: addi sp, sp, 64
+; RV32-NEXT: ret
+;
+; RV64-LABEL: preserve_mostcc1:
+; RV64: # %bb.0: # %entry
+; RV64-NEXT: addi sp, sp, -128
+; RV64-NEXT: sd t0, 120(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t1, 112(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t2, 104(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a0, 96(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a1, 88(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a2, 80(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a3, 72(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a4, 64(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a5, 56(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a6, 48(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a7, 40(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t3, 32(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t4, 24(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t5, 16(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t6, 8(sp) # 8-byte Folded Spill
+; RV64-NEXT: call standard_cc_func
+; RV64-NEXT: ld t0, 120(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t1, 112(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t2, 104(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a0, 96(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a1, 88(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a2, 80(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a3, 72(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a4, 64(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a5, 56(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a6, 48(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a7, 40(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t3, 32(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t4, 24(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t5, 16(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t6, 8(sp) # 8-byte Folded Reload
+; RV64-NEXT: addi sp, sp, 128
+; RV64-NEXT: ret
+entry:
+ call void @standard_cc_func()
+ ret void
+}
+
+define preserve_mostcc void @preserve_mostcc2() nounwind {
+; RV32-LABEL: preserve_mostcc2:
+; RV32: # %bb.0:
+; RV32-NEXT: addi sp, sp, -64
+; RV32-NEXT: sw t0, 60(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t1, 56(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t2, 52(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a0, 48(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a1, 44(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a2, 40(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a3, 36(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a4, 32(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a5, 28(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a6, 24(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw a7, 20(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t3, 16(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t4, 12(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t5, 8(sp) # 4-byte Folded Spill
+; RV32-NEXT: sw t6, 4(sp) # 4-byte Folded Spill
+; RV32-NEXT: call preserve_mostcc_func
+; RV32-NEXT: lw t0, 60(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t1, 56(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t2, 52(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a0, 48(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a1, 44(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a2, 40(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a3, 36(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a4, 32(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a5, 28(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a6, 24(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw a7, 20(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t3, 16(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t4, 12(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t5, 8(sp) # 4-byte Folded Reload
+; RV32-NEXT: lw t6, 4(sp) # 4-byte Folded Reload
+; RV32-NEXT: addi sp, sp, 64
+; RV32-NEXT: ret
+;
+; RV64-LABEL: preserve_mostcc2:
+; RV64: # %bb.0:
+; RV64-NEXT: addi sp, sp, -128
+; RV64-NEXT: sd t0, 120(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t1, 112(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t2, 104(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a0, 96(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a1, 88(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a2, 80(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a3, 72(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a4, 64(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a5, 56(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a6, 48(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd a7, 40(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t3, 32(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t4, 24(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t5, 16(sp) # 8-byte Folded Spill
+; RV64-NEXT: sd t6, 8(sp) # 8-byte Folded Spill
+; RV64-NEXT: call preserve_mostcc_func
+; RV64-NEXT: ld t0, 120(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t1, 112(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t2, 104(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a0, 96(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a1, 88(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a2, 80(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a3, 72(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a4, 64(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a5, 56(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a6, 48(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld a7, 40(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t3, 32(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t4, 24(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t5, 16(sp) # 8-byte Folded Reload
+; RV64-NEXT: ld t6, 8(sp) # 8-byte Folded Reload
+; RV64-NEXT: addi sp, sp, 128
+; RV64-NEXT: ret
+ call preserve_mostcc void @preserve_mostcc_func()
+ ret void
+}
>From a5812f1bc541bdfed4be3cacdb13462d653080e4 Mon Sep 17 00:00:00 2001
From: Pengcheng Wang <wangpengcheng.pp at bytedance.com>
Date: Tue, 15 Jul 2025 11:46:48 +0800
Subject: [PATCH 2/2] Add E and getCallPreservedMask
---
llvm/lib/Target/RISCV/RISCVCallingConv.td | 4 +-
llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp | 12 +-
.../RISCV/calling-conv-preserve-most.ll | 314 ++++++++++--------
3 files changed, 181 insertions(+), 149 deletions(-)
diff --git a/llvm/lib/Target/RISCV/RISCVCallingConv.td b/llvm/lib/Target/RISCV/RISCVCallingConv.td
index 90e5019019bed..056f3d826d7cd 100644
--- a/llvm/lib/Target/RISCV/RISCVCallingConv.td
+++ b/llvm/lib/Target/RISCV/RISCVCallingConv.td
@@ -94,4 +94,6 @@ def CSR_XLEN_F32_V_Interrupt_RVE: CalleeSavedRegs<(sub CSR_XLEN_F32_V_Interrupt,
def CSR_XLEN_F64_V_Interrupt_RVE: CalleeSavedRegs<(sub CSR_XLEN_F64_V_Interrupt,
(sequence "X%u", 16, 31))>;
-def CSR_RT_MostRegs : CalleeSavedRegs<(add (sequence "X%u", 5, 31))>;
+def CSR_RT_MostRegs : CalleeSavedRegs<(add X1, (sequence "X%u", 5, 31))>;
+def CSR_RT_MostRegs_RVE : CalleeSavedRegs<(sub CSR_RT_MostRegs,
+ (sequence "X%u", 16, 31))>;
diff --git a/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp b/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
index 44c7ca3587cc1..816fd95a55ed0 100644
--- a/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
@@ -11,6 +11,7 @@
//===----------------------------------------------------------------------===//
#include "RISCVRegisterInfo.h"
+#include "MCTargetDesc/RISCVBaseInfo.h"
#include "RISCV.h"
#include "RISCVSubtarget.h"
#include "llvm/ADT/SmallSet.h"
@@ -69,7 +70,8 @@ RISCVRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
if (MF->getFunction().getCallingConv() == CallingConv::GHC)
return CSR_NoRegs_SaveList;
if (MF->getFunction().getCallingConv() == CallingConv::PreserveMost)
- return CSR_RT_MostRegs_SaveList;
+ return Subtarget.hasStdExtE() ? CSR_RT_MostRegs_RVE_SaveList
+ : CSR_RT_MostRegs_SaveList;
if (MF->getFunction().hasFnAttribute("interrupt")) {
if (Subtarget.hasVInstructions()) {
if (Subtarget.hasStdExtD())
@@ -813,7 +815,13 @@ RISCVRegisterInfo::getCallPreservedMask(const MachineFunction & MF,
if (CC == CallingConv::GHC)
return CSR_NoRegs_RegMask;
- switch (Subtarget.getTargetABI()) {
+ RISCVABI::ABI ABI = Subtarget.getTargetABI();
+ if (CC == CallingConv::PreserveMost) {
+ if (ABI == RISCVABI::ABI_ILP32E || ABI == RISCVABI::ABI_LP64E)
+ return CSR_RT_MostRegs_RVE_RegMask;
+ return CSR_RT_MostRegs_RegMask;
+ }
+ switch (ABI) {
default:
llvm_unreachable("Unrecognized ABI");
case RISCVABI::ABI_ILP32E:
diff --git a/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll b/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
index a0345363601a5..dd8ef7ac55892 100644
--- a/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
+++ b/llvm/test/CodeGen/RISCV/calling-conv-preserve-most.ll
@@ -1,6 +1,8 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple=riscv32 < %s | FileCheck %s -check-prefix=RV32
-; RUN: llc -mtriple=riscv64 < %s | FileCheck %s -check-prefix=RV64
+; RUN: llc -mtriple=riscv32 < %s | FileCheck %s -check-prefix=RV32I
+; RUN: llc -mtriple=riscv64 < %s | FileCheck %s -check-prefix=RV64I
+; RUN: llc -mtriple=riscv32 -mattr=+e -target-abi ilp32e < %s | FileCheck %s -check-prefix=RV32E
+; RUN: llc -mtriple=riscv64 -mattr=+e -target-abi lp64e < %s | FileCheck %s -check-prefix=RV64E
; Check the PreserveMost calling convention works.
@@ -8,158 +10,178 @@ declare void @standard_cc_func()
declare preserve_mostcc void @preserve_mostcc_func()
define preserve_mostcc void @preserve_mostcc1() nounwind {
-; RV32-LABEL: preserve_mostcc1:
-; RV32: # %bb.0: # %entry
-; RV32-NEXT: addi sp, sp, -64
-; RV32-NEXT: sw t0, 60(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t1, 56(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t2, 52(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a0, 48(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a1, 44(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a2, 40(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a3, 36(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a4, 32(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a5, 28(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a6, 24(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a7, 20(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t3, 16(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t4, 12(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t5, 8(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t6, 4(sp) # 4-byte Folded Spill
-; RV32-NEXT: call standard_cc_func
-; RV32-NEXT: lw t0, 60(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t1, 56(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t2, 52(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a0, 48(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a1, 44(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a2, 40(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a3, 36(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a4, 32(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a5, 28(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a6, 24(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a7, 20(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t3, 16(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t4, 12(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t5, 8(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t6, 4(sp) # 4-byte Folded Reload
-; RV32-NEXT: addi sp, sp, 64
-; RV32-NEXT: ret
+; RV32I-LABEL: preserve_mostcc1:
+; RV32I: # %bb.0: # %entry
+; RV32I-NEXT: addi sp, sp, -64
+; RV32I-NEXT: sw ra, 60(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t0, 56(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t1, 52(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t2, 48(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a0, 44(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a1, 40(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a2, 36(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a3, 32(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a4, 28(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a5, 24(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a6, 20(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw a7, 16(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t3, 12(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t4, 8(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t5, 4(sp) # 4-byte Folded Spill
+; RV32I-NEXT: sw t6, 0(sp) # 4-byte Folded Spill
+; RV32I-NEXT: call standard_cc_func
+; RV32I-NEXT: lw ra, 60(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t0, 56(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t1, 52(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t2, 48(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a0, 44(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a1, 40(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a2, 36(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a3, 32(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a4, 28(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a5, 24(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a6, 20(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw a7, 16(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t3, 12(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t4, 8(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t5, 4(sp) # 4-byte Folded Reload
+; RV32I-NEXT: lw t6, 0(sp) # 4-byte Folded Reload
+; RV32I-NEXT: addi sp, sp, 64
+; RV32I-NEXT: ret
;
-; RV64-LABEL: preserve_mostcc1:
-; RV64: # %bb.0: # %entry
-; RV64-NEXT: addi sp, sp, -128
-; RV64-NEXT: sd t0, 120(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t1, 112(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t2, 104(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a0, 96(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a1, 88(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a2, 80(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a3, 72(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a4, 64(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a5, 56(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a6, 48(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a7, 40(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t3, 32(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t4, 24(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t5, 16(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t6, 8(sp) # 8-byte Folded Spill
-; RV64-NEXT: call standard_cc_func
-; RV64-NEXT: ld t0, 120(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t1, 112(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t2, 104(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a0, 96(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a1, 88(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a2, 80(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a3, 72(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a4, 64(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a5, 56(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a6, 48(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a7, 40(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t3, 32(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t4, 24(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t5, 16(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t6, 8(sp) # 8-byte Folded Reload
-; RV64-NEXT: addi sp, sp, 128
-; RV64-NEXT: ret
+; RV64I-LABEL: preserve_mostcc1:
+; RV64I: # %bb.0: # %entry
+; RV64I-NEXT: addi sp, sp, -128
+; RV64I-NEXT: sd ra, 120(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t0, 112(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t1, 104(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t2, 96(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a0, 88(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a1, 80(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a2, 72(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a3, 64(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a4, 56(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a5, 48(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a6, 40(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd a7, 32(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t3, 24(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t4, 16(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t5, 8(sp) # 8-byte Folded Spill
+; RV64I-NEXT: sd t6, 0(sp) # 8-byte Folded Spill
+; RV64I-NEXT: call standard_cc_func
+; RV64I-NEXT: ld ra, 120(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t0, 112(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t1, 104(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t2, 96(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a0, 88(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a1, 80(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a2, 72(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a3, 64(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a4, 56(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a5, 48(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a6, 40(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld a7, 32(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t3, 24(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t4, 16(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t5, 8(sp) # 8-byte Folded Reload
+; RV64I-NEXT: ld t6, 0(sp) # 8-byte Folded Reload
+; RV64I-NEXT: addi sp, sp, 128
+; RV64I-NEXT: ret
+;
+; RV32E-LABEL: preserve_mostcc1:
+; RV32E: # %bb.0: # %entry
+; RV32E-NEXT: addi sp, sp, -40
+; RV32E-NEXT: sw ra, 36(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw t0, 32(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw t1, 28(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw t2, 24(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a0, 20(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a1, 16(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a2, 12(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a3, 8(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a4, 4(sp) # 4-byte Folded Spill
+; RV32E-NEXT: sw a5, 0(sp) # 4-byte Folded Spill
+; RV32E-NEXT: call standard_cc_func
+; RV32E-NEXT: lw ra, 36(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw t0, 32(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw t1, 28(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw t2, 24(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a0, 20(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a1, 16(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a2, 12(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a3, 8(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a4, 4(sp) # 4-byte Folded Reload
+; RV32E-NEXT: lw a5, 0(sp) # 4-byte Folded Reload
+; RV32E-NEXT: addi sp, sp, 40
+; RV32E-NEXT: ret
+;
+; RV64E-LABEL: preserve_mostcc1:
+; RV64E: # %bb.0: # %entry
+; RV64E-NEXT: addi sp, sp, -80
+; RV64E-NEXT: sd ra, 72(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd t0, 64(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd t1, 56(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd t2, 48(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a0, 40(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a1, 32(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a2, 24(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a3, 16(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a4, 8(sp) # 8-byte Folded Spill
+; RV64E-NEXT: sd a5, 0(sp) # 8-byte Folded Spill
+; RV64E-NEXT: call standard_cc_func
+; RV64E-NEXT: ld ra, 72(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld t0, 64(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld t1, 56(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld t2, 48(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a0, 40(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a1, 32(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a2, 24(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a3, 16(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a4, 8(sp) # 8-byte Folded Reload
+; RV64E-NEXT: ld a5, 0(sp) # 8-byte Folded Reload
+; RV64E-NEXT: addi sp, sp, 80
+; RV64E-NEXT: ret
entry:
call void @standard_cc_func()
ret void
}
define preserve_mostcc void @preserve_mostcc2() nounwind {
-; RV32-LABEL: preserve_mostcc2:
-; RV32: # %bb.0:
-; RV32-NEXT: addi sp, sp, -64
-; RV32-NEXT: sw t0, 60(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t1, 56(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t2, 52(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a0, 48(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a1, 44(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a2, 40(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a3, 36(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a4, 32(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a5, 28(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a6, 24(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw a7, 20(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t3, 16(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t4, 12(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t5, 8(sp) # 4-byte Folded Spill
-; RV32-NEXT: sw t6, 4(sp) # 4-byte Folded Spill
-; RV32-NEXT: call preserve_mostcc_func
-; RV32-NEXT: lw t0, 60(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t1, 56(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t2, 52(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a0, 48(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a1, 44(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a2, 40(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a3, 36(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a4, 32(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a5, 28(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a6, 24(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw a7, 20(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t3, 16(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t4, 12(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t5, 8(sp) # 4-byte Folded Reload
-; RV32-NEXT: lw t6, 4(sp) # 4-byte Folded Reload
-; RV32-NEXT: addi sp, sp, 64
-; RV32-NEXT: ret
+; RV32I-LABEL: preserve_mostcc2:
+; RV32I: # %bb.0:
+; RV32I-NEXT: addi sp, sp, -16
+; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
+; RV32I-NEXT: call preserve_mostcc_func
+; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
+; RV32I-NEXT: addi sp, sp, 16
+; RV32I-NEXT: ret
+;
+; RV64I-LABEL: preserve_mostcc2:
+; RV64I: # %bb.0:
+; RV64I-NEXT: addi sp, sp, -16
+; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
+; RV64I-NEXT: call preserve_mostcc_func
+; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
+; RV64I-NEXT: addi sp, sp, 16
+; RV64I-NEXT: ret
+;
+; RV32E-LABEL: preserve_mostcc2:
+; RV32E: # %bb.0:
+; RV32E-NEXT: addi sp, sp, -4
+; RV32E-NEXT: sw ra, 0(sp) # 4-byte Folded Spill
+; RV32E-NEXT: call preserve_mostcc_func
+; RV32E-NEXT: lw ra, 0(sp) # 4-byte Folded Reload
+; RV32E-NEXT: addi sp, sp, 4
+; RV32E-NEXT: ret
;
-; RV64-LABEL: preserve_mostcc2:
-; RV64: # %bb.0:
-; RV64-NEXT: addi sp, sp, -128
-; RV64-NEXT: sd t0, 120(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t1, 112(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t2, 104(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a0, 96(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a1, 88(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a2, 80(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a3, 72(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a4, 64(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a5, 56(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a6, 48(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd a7, 40(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t3, 32(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t4, 24(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t5, 16(sp) # 8-byte Folded Spill
-; RV64-NEXT: sd t6, 8(sp) # 8-byte Folded Spill
-; RV64-NEXT: call preserve_mostcc_func
-; RV64-NEXT: ld t0, 120(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t1, 112(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t2, 104(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a0, 96(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a1, 88(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a2, 80(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a3, 72(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a4, 64(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a5, 56(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a6, 48(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld a7, 40(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t3, 32(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t4, 24(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t5, 16(sp) # 8-byte Folded Reload
-; RV64-NEXT: ld t6, 8(sp) # 8-byte Folded Reload
-; RV64-NEXT: addi sp, sp, 128
-; RV64-NEXT: ret
+; RV64E-LABEL: preserve_mostcc2:
+; RV64E: # %bb.0:
+; RV64E-NEXT: addi sp, sp, -8
+; RV64E-NEXT: sd ra, 0(sp) # 8-byte Folded Spill
+; RV64E-NEXT: call preserve_mostcc_func
+; RV64E-NEXT: ld ra, 0(sp) # 8-byte Folded Reload
+; RV64E-NEXT: addi sp, sp, 8
+; RV64E-NEXT: ret
call preserve_mostcc void @preserve_mostcc_func()
ret void
}
More information about the llvm-commits
mailing list