[WebAssembly] Fixed Disassembler ignoring endian swap on big endian.
Summary: This fixes: https://bugs.llvm.org/show_bug.cgi?id=40620
Reviewers: aheejin
Subscribers: dschuff, sbc100, jgravelle-google, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57933
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353496 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp b/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
index 2a0ccfc..287b244 100644
--- a/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
+++ b/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
@@ -108,9 +108,8 @@
bool parseImmediate(MCInst &MI, uint64_t &Size, ArrayRef<uint8_t> Bytes) {
if (Size + sizeof(T) > Bytes.size())
return false;
- T Val;
- memcpy(&Val, Bytes.data() + Size, sizeof(T));
- support::endian::byte_swap<T, support::endianness::little>(Val);
+ T Val = support::endian::read<T, support::endianness::little, alignof(T)>(
+ Bytes.data() + Size);
Size += sizeof(T);
if (std::is_floating_point<T>::value) {
MI.addOperand(MCOperand::createFPImm(static_cast<double>(Val)));
diff --git a/test/MC/Disassembler/WebAssembly/wasm.txt b/test/MC/Disassembler/WebAssembly/wasm.txt
index 8e4607d..8a119fb 100644
--- a/test/MC/Disassembler/WebAssembly/wasm.txt
+++ b/test/MC/Disassembler/WebAssembly/wasm.txt
@@ -33,9 +33,7 @@
# CHECK: i64.trunc_sat_f64_u
0xFC 0x07
-# FIXME Disabled temporarily due to failures in clang-ppc64be-linux and
-# clang-s390x-linux bots
-# C HECK: v128.const 50462976, 117835012, 185207048, 252579084
+# CHECK: v128.const 50462976, 117835012, 185207048, 252579084
0xFD 0x02 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
# CHECK: v8x16.shuffle 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
