WebAssembly: generate load/store

Summary: This handles all load/store operations that WebAssembly defines, and handles those necessary for C++ such as i1. I left a FIXME for outstanding features which aren't required for now.

Reviewers: sunfish

Subscribers: jfb, llvm-commits, dschuff
llvm-svn: 246500

1 files changed, 68 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/WebAssembly/load-store-i1.ll b/llvm/test/CodeGen/WebAssembly/load-store-i1.ll
new file mode 100644
index 00000000000..99b689e0cb2
--- /dev/null
+++ b/llvm/test/CodeGen/WebAssembly/load-store-i1.ll
@@ -0,0 +1,68 @@
+; RUN: llc < %s -asm-verbose=false | FileCheck %s
+
+; Test that i1 extending loads and truncating stores are assembled properly.
+
+target datalayout = "e-p:32:32-i64:64-v128:8:128-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; CHECK-LABEL: (func $load_unsigned_i1_i32
+; CHECK:      (setlocal @1 (load_zx_i8_i32 @0))
+; CHECK-NEXT: (return @1)
+define i32 @load_unsigned_i1_i32(i1* %p) {
+  %v = load i1, i1* %p
+  %e = zext i1 %v to i32
+  ret i32 %e
+}
+
+; CHECK-LABEL: (func $load_signed_i1_i32
+; CHECK:      (setlocal @1 (load_zx_i8_i32 @0))
+; CHECK-NEXT: (setlocal @2 (immediate 31))
+; CHECK-NEXT: (setlocal @3 (shl @1 @2))
+; CHECK-NEXT: (setlocal @4 (sar @3 @2))
+; CHECK-NEXT: (return @4)
+define i32 @load_signed_i1_i32(i1* %p) {
+  %v = load i1, i1* %p
+  %e = sext i1 %v to i32
+  ret i32 %e
+}
+
+; CHECK-LABEL: (func $load_unsigned_i1_i64
+; CHECK:      (setlocal @1 (load_zx_i8_i64 @0))
+; CHECK-NEXT: (return @1)
+define i64 @load_unsigned_i1_i64(i1* %p) {
+  %v = load i1, i1* %p
+  %e = zext i1 %v to i64
+  ret i64 %e
+}
+
+; CHECK-LABEL: (func $load_signed_i1_i64
+; CHECK:      (setlocal @1 (load_zx_i8_i64 @0))
+; CHECK-NEXT: (setlocal @2 (immediate 63))
+; CHECK-NEXT: (setlocal @3 (shl @1 @2))
+; CHECK-NEXT: (setlocal @4 (sar @3 @2))
+; CHECK-NEXT: (return @4)
+define i64 @load_signed_i1_i64(i1* %p) {
+  %v = load i1, i1* %p
+  %e = sext i1 %v to i64
+  ret i64 %e
+}
+
+; CHECK-LABEL: (func $store_i32_i1
+; CHECK:      (setlocal @2 (immediate 1))
+; CHECK-NEXT: (setlocal @3 (and @1 @2))
+; CHECK-NEXT: (store_i8 @0 @3)
+define void @store_i32_i1(i1* %p, i32 %v) {
+  %t = trunc i32 %v to i1
+  store i1 %t, i1* %p
+  ret void
+}
+
+; CHECK-LABEL: (func $store_i64_i1
+; CHECK:      (setlocal @2 (immediate 1))
+; CHECK-NEXT: (setlocal @3 (and @1 @2))
+; CHECK-NEXT: (store_i8 @0 @3)
+define void @store_i64_i1(i1* %p, i64 %v) {
+  %t = trunc i64 %v to i1
+  store i1 %t, i1* %p
+  ret void
+}