[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
diff --git a/llvm/test/CodeGen/WebAssembly/signext-inreg.ll b/llvm/test/CodeGen/WebAssembly/signext-inreg.ll
new file mode 100644
index 0000000..c97a1bf
--- /dev/null
+++ b/llvm/test/CodeGen/WebAssembly/signext-inreg.ll
@@ -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
+}
+