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[X86][LWP] Add stack folding mappings and tests for LWPINS/LWPVAL instructions

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llvm-svn: 302049
This commit is contained in:
Simon Pilgrim 2017-05-03 16:46:30 +00:00
parent 680aa488ee
commit 8fe5bc5e05
2 changed files with 55 additions and 0 deletions
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6
lib/Target/X86/X86InstrInfo.cpp
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@ -821,6 +821,12 @@ X86InstrInfo::X86InstrInfo(X86Subtarget &STI)
{ X86::VPSHLQrr, X86::VPSHLQmr, 0 },
{ X86::VPSHLWrr, X86::VPSHLWmr, 0 },
// LWP foldable instructions
{ X86::LWPINS32rri, X86::LWPINS32rmi, 0 },
{ X86::LWPINS64rri, X86::LWPINS64rmi, 0 },
{ X86::LWPVAL32rri, X86::LWPVAL32rmi, 0 },
{ X86::LWPVAL64rri, X86::LWPVAL64rmi, 0 },
// BMI/BMI2/LZCNT/POPCNT/TBM foldable instructions
{ X86::BEXTR32rr, X86::BEXTR32rm, 0 },
{ X86::BEXTR64rr, X86::BEXTR64rm, 0 },

49
test/CodeGen/X86/stack-folding-lwp.ll Normal file
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@ -0,0 +1,49 @@
; RUN: llc -O3 -disable-peephole -mtriple=x86_64-unknown-unknown -mattr=+lwp < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"
; Stack reload folding tests.
;
; By including a nop call with sideeffects we can force a partial register spill of the
; relevant registers and check that the reload is correctly folded into the instruction.
define i8 @stack_fold_lwpins_u32(i32 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_lwpins_u32
; CHECK: # BB#0:
; CHECK: lwpins $2814, {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
%1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
%2 = tail call i8 @llvm.x86.lwpins32(i32 %a0, i32 %a1, i32 2814)
ret i8 %2
}
declare i8 @llvm.x86.lwpins32(i32, i32, i32)
define i8 @stack_fold_lwpins_u64(i64 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_lwpins_u64
; CHECK: # BB#0:
; CHECK: lwpins $2814, {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 4-byte Folded Reload
%1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
%2 = tail call i8 @llvm.x86.lwpins64(i64 %a0, i32 %a1, i32 2814)
ret i8 %2
}
declare i8 @llvm.x86.lwpins64(i64, i32, i32)
define void @stack_fold_lwpval_u32(i32 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_lwpval_u32
; CHECK: # BB#0:
; CHECK: lwpval $2814, {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
%1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
tail call void @llvm.x86.lwpval32(i32 %a0, i32 %a1, i32 2814)
ret void
}
declare void @llvm.x86.lwpval32(i32, i32, i32)
define void @stack_fold_lwpval_u64(i64 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_lwpval_u64
; CHECK: # BB#0:
; CHECK: lwpval $2814, {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 4-byte Folded Reload
%1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
tail call void @llvm.x86.lwpval64(i64 %a0, i32 %a1, i32 2814)
ret void
}
declare void @llvm.x86.lwpval64(i64, i32, i32)