Add icmp and conditional branches in the C API echo test.

[deadalnix]

Summary

Improving coverage.

Depends on D16912 .

[deadalnix]

Test all predicates

[mehdi_amini]

tools/llvm-c-test/echo.cpp

230

It seems to me that "Then" and "Else" are reversed?

[deadalnix]

tools/llvm-c-test/echo.cpp

230

I was surprized by this to when making that diff, but it looks like it is this way.

[mehdi_amini]

LGTM, it seems I'll have to be bitten by the reversed branch target more and more...

test/Bindings/llvm-c/echo.ll

define i32 @iops(i32 %a, i32 %b) {
   ret i32 %13
 }
 
 define i32 @call() {
   %1 = call i32 @iops(i32 23, i32 19)
   ret i32 %1
 }
 
-define i32 @bborder(i32 %a, i32 %b) {
+define i32 @cond(i32 %a, i32 %b) {
   br label %br
 unreachable:
   unreachable
 br:
-  br label %unreachable
+  %1 = icmp eq i32 %a, %b
+  br i1 %1, label %next0, label %unreachable
+next0:
+  %2 = icmp ne i32 %a, %b
+  br i1 %2, label %next1, label %unreachable
+next1:
+  %3 = icmp ugt i32 %a, %b
+  br i1 %3, label %next2, label %unreachable
+next2:
+  %4 = icmp uge i32 %a, %b
+  br i1 %4, label %next3, label %unreachable
+next3:
+  %5 = icmp ult i32 %a, %b
+  br i1 %5, label %next4, label %unreachable
+next4:
+  %6 = icmp ule i32 %a, %b
+  br i1 %6, label %next5, label %unreachable
+next5:
+  %7 = icmp sgt i32 %a, %b
+  br i1 %7, label %next6, label %unreachable
+next6:
+  %8 = icmp sge i32 %a, %b
+  br i1 %8, label %next7, label %unreachable
+next7:
+  %9 = icmp slt i32 %a, %b
+  br i1 %9, label %next8, label %unreachable
+next8:
+  %10 = icmp sle i32 %a, %b
+  br i1 %10, label %next9, label %unreachable
+next9:
+  ret i32 0
 }

tools/llvm-c-test/echo.cpp

switch(Op) {
         if (OpCount == 0)
           Dst = LLVMBuildRetVoid(Builder);
         else
           Dst = LLVMBuildRet(Builder, CloneValue(LLVMGetOperand(Src, 0),
                                                  Builder));
         break;
       }
       case LLVMBr: {
-        LLVMBasicBlockRef SrcBB = LLVMValueAsBasicBlock(LLVMGetOperand(Src, 0));
+        if (!LLVMIsConditional(Src)) {
+          LLVMValueRef SrcOp = LLVMGetOperand(Src, 0);
+          LLVMBasicBlockRef SrcBB = LLVMValueAsBasicBlock(SrcOp);
           Dst = LLVMBuildBr(Builder, DeclareBB(SrcBB));
           break;
         }
+
+        LLVMValueRef Cond = LLVMGetCondition(Src);
+        LLVMValueRef Else = LLVMGetOperand(Src, 1);
+        LLVMBasicBlockRef ElseBB = DeclareBB(LLVMValueAsBasicBlock(Else));
+        LLVMValueRef Then = LLVMGetOperand(Src, 2);
+        LLVMBasicBlockRef ThenBB = DeclareBB(LLVMValueAsBasicBlock(Then));
+        Dst = LLVMBuildCondBr(Builder, Cond, ThenBB, ElseBB);
+        break;
+      }
       case LLVMSwitch:
       case LLVMIndirectBr:
       case LLVMInvoke:
         break;
       case LLVMUnreachable:
         Dst = LLVMBuildUnreachable(Builder);
         break;
       case LLVMAdd: {
switch(Op) {
         break;
       }
       case LLVMAlloca: {
         // TODO: Add a binding for AllocaInst::getAllocatedType
         LLVMTypeRef Ty = LLVMGetElementType(LLVMTypeOf(Src));
         Dst = LLVMBuildAlloca(Builder, Ty, Name);
         break;
       }
+      case LLVMICmp: {
+        LLVMIntPredicate Pred = LLVMGetICmpPredicate(Src);
+        LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0), Builder);
+        LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1), Builder);
+        Dst = LLVMBuildICmp(Builder, Pred, LHS, RHS, Name);
+        break;
+      }
       case LLVMCall: {
         int ArgCount = LLVMGetNumOperands(Src) - 1;
         SmallVector<LLVMValueRef, 8> Args;
         for (int i = 0; i < ArgCount; i++)
           Args.push_back(CloneValue(LLVMGetOperand(Src, i), Builder));
         LLVMValueRef Fn = CloneValue(LLVMGetOperand(Src, ArgCount), Builder);
         Dst = LLVMBuildCall(Builder, Fn, Args.data(), ArgCount, Name);
         break;