3 files changed, 98 insertions, 0 deletions
diff --git a/llvm/test/MC/X86/intel-syntax-ambiguous.s b/llvm/test/MC/X86/intel-syntax-ambiguous.s
new file mode 100644
index 00000000000..1acfb5ba70f
--- /dev/null
+++ b/llvm/test/MC/X86/intel-syntax-ambiguous.s
@@ -0,0 +1,44 @@
+// RUN: not llvm-mc -triple i686-unknown-unknown %s -o /dev/null 2>&1 | FileCheck %s
+
+.intel_syntax
+
+// Basic case of ambiguity for inc.
+
+inc [eax]
+// CHECK: error: ambiguous operand size for instruction 'inc'
+inc dword ptr [eax]
+inc word ptr [eax]
+inc byte ptr [eax]
+// CHECK-NOT: error:
+
+// Other ambiguous instructions.  Anything that doesn't take a register,
+// basically.
+
+dec [eax]
+// CHECK: error: ambiguous operand size for instruction 'dec'
+mov [eax], 1
+// CHECK: error: ambiguous operand size for instruction 'mov'
+and [eax], 0
+// CHECK: error: ambiguous operand size for instruction 'and'
+or [eax], 1
+// CHECK: error: ambiguous operand size for instruction 'or'
+add [eax], 1
+// CHECK: error: ambiguous operand size for instruction 'add'
+sub [eax], 1
+// CHECK: error: ambiguous operand size for instruction 'sub'
+
+// gas assumes these instructions are pointer-sized by default, and we follow
+// suit.
+push [eax]
+call [eax]
+jmp [eax]
+// CHECK-NOT: error:
+
+add byte ptr [eax], eax
+// CHECK: error: invalid operand for instruction
+
+add byte ptr [eax], eax
+// CHECK: error: invalid operand for instruction
+
+add rax, 3
+// CHECK: error: register %rax is only available in 64-bit mode
diff --git a/llvm/test/MC/X86/intel-syntax-ptr-sized.s b/llvm/test/MC/X86/intel-syntax-ptr-sized.s
new file mode 100644
index 00000000000..c052c322b80
--- /dev/null
+++ b/llvm/test/MC/X86/intel-syntax-ptr-sized.s
@@ -0,0 +1,20 @@
+// RUN: llvm-mc %s -triple=i686-pc-windows | FileCheck %s
+
+.intel_syntax
+
+push [eax]
+// CHECK: pushl (%eax)
+call [eax]
+// CHECK: calll *(%eax)
+jmp [eax]
+// CHECK: jmpl *(%eax)
+
+// mode switch
+.code16
+
+push [eax]
+// CHECK: pushw (%eax)
+call [eax]
+// CHECK: callw *(%eax)
+jmp [eax]
+// CHECK: jmpw *(%eax)
diff --git a/llvm/test/MC/X86/intel-syntax.s b/llvm/test/MC/X86/intel-syntax.s
index 796891880b1..bb1762e4727 100644
--- a/llvm/test/MC/X86/intel-syntax.s
+++ b/llvm/test/MC/X86/intel-syntax.s
@@ -607,3 +607,37 @@ fadd   "?half@?0??bar@@YAXXZ@4NA"
 fadd   "?half@?0??bar@@YAXXZ@4NA"@IMGREL
 // CHECK: fadds   "?half@?0??bar@@YAXXZ@4NA"
 // CHECK: fadds   "?half@?0??bar@@YAXXZ@4NA"@IMGREL32
+
+inc qword ptr [rax]
+inc dword ptr [rax]
+inc word ptr [rax]
+inc byte ptr [rax]
+// CHECK: incq (%rax)
+// CHECK: incl (%rax)
+// CHECK: incw (%rax)
+// CHECK: incb (%rax)
+
+dec qword ptr [rax]
+dec dword ptr [rax]
+dec word ptr [rax]
+dec byte ptr [rax]
+// CHECK: decq (%rax)
+// CHECK: decl (%rax)
+// CHECK: decw (%rax)
+// CHECK: decb (%rax)
+
+add qword ptr [rax], 1
+add dword ptr [rax], 1
+add word ptr [rax], 1
+add byte ptr [rax], 1
+// CHECK: addq $1, (%rax)
+// CHECK: addl $1, (%rax)
+// CHECK: addw $1, (%rax)
+// CHECK: addb $1, (%rax)
+
+fstp xword ptr [rax]
+fstp qword ptr [rax]
+fstp dword ptr [rax]
+// CHECK: fstpt (%rax)
+// CHECK: fstpl (%rax)
+// CHECK: fstps (%rax)