[EVM] Add pre-commit test for Don't emit JUMPDEST in entry point of bytecode

Signed-off-by: Vladimir Radosavljevic <[email protected]>

Author: vladimirradosavljevic

llvm/test/CodeGen/EVM/jumpdest-in-entry-point.ll

@@ -0,0 +1,43 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -O3 < %s | FileCheck %s
+
+target datalayout = "E-p:256:256-i256:256:256-S256-a:256:256"
+target triple = "evm"
+
+declare void @llvm.evm.return(ptr addrspace(1), i256)
+
+define void @__entry() noreturn {
+; CHECK-LABEL: __entry:
+; CHECK:       ; %bb.0: ; %entry
+; CHECK-NEXT:    JUMPDEST
+; CHECK-NEXT:    PUSH0
+; CHECK-NEXT:    MLOAD
+; CHECK-NEXT:    DUP1
+; CHECK-NEXT:    PUSH0
+; CHECK-NEXT:    SWAP1
+; CHECK-NEXT:    PUSH4 @.BB0_2
+; CHECK-NEXT:    JUMPI
+; CHECK-NEXT:  ; %bb.1:
+; CHECK-NEXT:    SWAP1
+; CHECK-NEXT:  .BB0_2: ; %bb1
+; CHECK-NEXT:    JUMPDEST
+; CHECK-NEXT:    POP
+; CHECK-NEXT:    PUSH0
+; CHECK-NEXT:    MSTORE
+; CHECK-NEXT:    PUSH1 0x20
+; CHECK-NEXT:    PUSH0
+; CHECK-NEXT:    RETURN
+entry:
+  %load = load i256, ptr addrspace(1) null, align 64
+  %cmp = icmp eq i256 %load, 0
+  br i1 %cmp, label %bb2, label %bb1
+
+bb1:
+  br label %bb2
+
+bb2:
+  %phi = phi i256 [ 0, %entry ], [ %load, %bb1 ]
+  store i256 %phi, ptr addrspace(1) null, align 64
+  tail call void @llvm.evm.return(ptr addrspace(1) null, i256 32)
+  unreachable
+}