Add a new llvm.x86.int intrinsic, allowing access to the

x86 int and int3 instructions.  Patch by Peter Housel!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111831 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/IntrinsicsX86.td b/include/llvm/IntrinsicsX86.td
index b1ee9dc..c765d85 100644 (file)
--- a/include/llvm/IntrinsicsX86.td
+++ b/include/llvm/IntrinsicsX86.td
@@ -11,6 +11,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+//===----------------------------------------------------------------------===//
+// Interrupt traps
+let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
+  def int_x86_int : Intrinsic<[], [llvm_i8_ty]>;
+}
 
 //===----------------------------------------------------------------------===//
 // SSE1

diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 73788a1..60af8ed 100644 (file)
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -595,10 +595,14 @@ let neverHasSideEffects = 1 in {
 }
 
 // Trap
-def INTO : I<0xce, RawFrm, (outs), (ins), "into", []>;
-def INT3 : I<0xcc, RawFrm, (outs), (ins), "int3", []>;
+let Uses = [EFLAGS] in {
+  def INTO : I<0xce, RawFrm, (outs), (ins), "into", []>;
+}
+def INT3 : I<0xcc, RawFrm, (outs), (ins), "int3",
+              [(int_x86_int (i8 3))]>;
 // FIXME: need to make sure that "int $3" matches int3
-def INT : Ii8<0xcd, RawFrm, (outs), (ins i8imm:$trap), "int\t$trap", []>;
+def INT : Ii8<0xcd, RawFrm, (outs), (ins i8imm:$trap), "int\t$trap",
+              [(int_x86_int imm:$trap)]>;
 def IRET16 : I<0xcf, RawFrm, (outs), (ins), "iret{w}", []>, OpSize;
 def IRET32 : I<0xcf, RawFrm, (outs), (ins), "iret{l}", []>;
 

diff --git a/test/CodeGen/X86/int-intrinsic.ll b/test/CodeGen/X86/int-intrinsic.ll
new file mode 100644 (file)
index 0000000..45a9b0f
--- /dev/null
+++ b/test/CodeGen/X86/int-intrinsic.ll
@@ -0,0 +1,20 @@
+; RUN: llc < %s -march=x86    | FileCheck %s
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+
+declare void @llvm.x86.int(i8) nounwind
+
+; CHECK: int3
+; CHECK: ret
+define void @primitive_int3 () {
+bb.entry:
+  call void @llvm.x86.int(i8 3) nounwind
+  ret void
+}
+
+; CHECK: int   $-128
+; CHECK: ret
+define void @primitive_int128 () {
+bb.entry:
+  call void @llvm.x86.int(i8 128) nounwind
+  ret void
+}