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[WebAssembly] Add sign extend instructions from atomics proposal 

Select them from ISD::SIGN_EXTEND_INREG

Differential Revision: https://reviews.llvm.org/D37603

remove spurious change

llvm-svn: 313101
This commit is contained in:
Derek Schuff 2017-09-13 00:29:06 +00:00
parent 97ec1451a8
commit a519fe5a37
3 changed files with 95 additions and 2 deletions
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8
llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
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@ -115,8 +115,12 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
// As a special case, these operators use the type to mean the type to
// sign-extend from.
for (auto T : {MVT::i1, MVT::i8, MVT::i16, MVT::i32})
setOperationAction(ISD::SIGN_EXTEND_INREG, T, Expand);
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
if (!Subtarget->hasAtomics()) {
// The Atomics feature includes signext intructions.
for (auto T : {MVT::i8, MVT::i16, MVT::i32})
setOperationAction(ISD::SIGN_EXTEND_INREG, T, Expand);
}
// Dynamic stack allocation: use the default expansion.
setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);

18
llvm/lib/Target/WebAssembly/WebAssemblyInstrConv.td
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@ -26,6 +26,24 @@ def I64_EXTEND_U_I32 : I<(outs I64:$dst), (ins I32:$src),
[(set I64:$dst, (zext I32:$src))],
"i64.extend_u/i32\t$dst, $src", 0xad>;
let Predicates = [HasAtomics] in {
def I32_EXTEND8_S_I32 : I<(outs I32:$dst), (ins I32:$src),
[(set I32:$dst, (sext_inreg I32:$src, i8))],
"i32.extend8_s\t$dst, $src", 0xc0>;
def I32_EXTEND16_S_I32 : I<(outs I32:$dst), (ins I32:$src),
[(set I32:$dst, (sext_inreg I32:$src, i16))],
"i32.extend16_s\t$dst, $src", 0xc1>;
def I64_EXTEND8_S_I64 : I<(outs I64:$dst), (ins I64:$src),
[(set I64:$dst, (sext_inreg I64:$src, i8))],
"i64.extend8_s\t$dst, $src", 0xc2>;
def I64_EXTEND16_S_I64 : I<(outs I64:$dst), (ins I64:$src),
[(set I64:$dst, (sext_inreg I64:$src, i16))],
"i64.extend16_s\t$dst, $src", 0xc3>;
def I64_EXTEND32_S_I64 : I<(outs I64:$dst), (ins I64:$src),
[(set I64:$dst, (sext_inreg I64:$src, i32))],
"i64.extend32_s\t$dst, $src", 0xc4>;
} // Predicates = [HasAtomics]
} // defs = [ARGUMENTS]
// Expand a "don't care" extend into zero-extend (chosen over sign-extend

71
llvm/test/CodeGen/WebAssembly/signext-inreg.ll Normal file
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@ -0,0 +1,71 @@
; RUN: llc < %s -mattr=+atomics -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals | FileCheck %s
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals | FileCheck %s --check-prefix=NOATOMIC
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown-wasm"
; CHECK-LABEL: i32_extend8_s:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i32{{$}}
; CHECK-NEXT: i32.extend8_s $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}
; NOATOMIC-LABEL: i32_extend8_s
; NOATOMIC-NOT: i32.extend8_s
define i32 @i32_extend8_s(i8 %x) {
%a = sext i8 %x to i32
ret i32 %a
}
; CHECK-LABEL: i32_extend16_s:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i32{{$}}
; CHECK-NEXT: i32.extend16_s $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}
; NOATOMIC-LABEL: i32_extend16_s
; NOATOMIC-NOT: i32.extend16_s
define i32 @i32_extend16_s(i16 %x) {
%a = sext i16 %x to i32
ret i32 %a
}
; CHECK-LABEL: i64_extend8_s:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i64{{$}}
; CHECK-NEXT: i64.extend_u/i32 $push[[NUM1:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: i64.extend8_s $push[[NUM2:[0-9]+]]=, $pop[[NUM1]]{{$}}
; CHECK-NEXT: return $pop[[NUM2]]{{$}}
; NOATOMIC-LABEL: i64_extend8_s
; NOATOMIC-NOT: i64.extend8_s
define i64 @i64_extend8_s(i8 %x) {
%a = sext i8 %x to i64
ret i64 %a
}
; CHECK-LABEL: i64_extend16_s:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i64{{$}}
; CHECK-NEXT: i64.extend_u/i32 $push[[NUM1:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: i64.extend16_s $push[[NUM2:[0-9]+]]=, $pop[[NUM1]]{{$}}
; CHECK-NEXT: return $pop[[NUM2]]{{$}}
; NOATOMIC-LABEL: i64_extend16_s
; NOATOMIC-NOT: i16.extend16_s
define i64 @i64_extend16_s(i16 %x) {
%a = sext i16 %x to i64
ret i64 %a
}
; No SIGN_EXTEND_INREG is needed for 32->64 extension.
; CHECK-LABEL: i64_extend32_s:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i64{{$}}
; CHECK-NEXT: i64.extend_s/i32 $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}
define i64 @i64_extend32_s(i32 %x) {
%a = sext i32 %x to i64
ret i64 %a
}