diff --git a/js/src/jit-test/tests/ion/branch-pruning-abuse.js b/js/src/jit-test/tests/ion/branch-pruning-abuse.js
new file mode 100644
index 000000000000..e3125bfd09df
--- /dev/null
+++ b/js/src/jit-test/tests/ion/branch-pruning-abuse.js
@@ -0,0 +1,335 @@
+function foo() {
+  var a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
+  var a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
+  var a21, a22, a23, a24, a25, a26, a27, a28, a29, a30;
+  var a31, a32, a33, a34, a35, a36, a37, a38, a39, a40;
+  var a41, a42, a43, a44, a45, a46, a47, a48, a49, a50;
+  var a51, a52, a53, a54, a55, a56, a57, a58, a59, a60;
+  var a61, a62, a63, a64, a65, a66, a67, a68, a69, a70;
+  var a71, a72, a73, a74, a75, a76, a77, a78, a79, a80;
+  var a81, a82, a83, a84, a85, a86, a87, a88, a89, a90;
+  var a91, a92, a93, a94, a95, a96, a97, a98, a99, a100;
+  var b1, b2, b3, b4, b5, b6, b7, b8, b9, b10;
+  var b11, b12, b13, b14, b15, b16, b17, b18, b19, b20;
+  var b21, b22, b23, b24, b25, b26, b27, b28, b29, b30;
+  var b31, b32, b33, b34, b35, b36, b37, b38, b39, b40;
+  var b41, b42, b43, b44, b45, b46, b47, b48, b49, b50;
+  var b51, b52, b53, b54, b55, b56, b57, b58, b59, b60;
+  var b61, b62, b63, b64, b65, b66, b67, b68, b69, b70;
+  var b71, b72, b73, b74, b75, b76, b77, b78, b79, b80;
+  var b81, b82, b83, b84, b85, b86, b87, b88, b89, b90;
+  var b91, b92, b93, b94, b95, b96, b97, b98, b99, b100;
+  var c1, c2, c3, c4, c5, c6, c7, c8, c9, c10;
+  var c11, c12, c13, c14, c15, c16, c17, c18, c19, c20;
+  var c21, c22, c23, c24, c25, c26, c27, c28, c29, c30;
+  var c31, c32, c33, c34, c35, c36, c37, c38, c39, c40;
+  var c41, c42, c43, c44, c45, c46, c47, c48, c49, c50;
+  var c51, c52, c53, c54, c55, c56, c57, c58, c59, c60;
+  var c61, c62, c63, c64, c65, c66, c67, c68, c69, c70;
+  var c71, c72, c73, c74, c75, c76, c77, c78, c79, c80;
+  var c81, c82, c83, c84, c85, c86, c87, c88, c89, c90;
+  var c91, c92, c93, c94, c95, c96, c97, c98, c99, c100;
+  if (a1) {}
+  else if (a2) {}
+  else if (a3) {}
+  else if (a4) {}
+  else if (a5) {}
+  else if (a6) {}
+  else if (a7) {}
+  else if (a8) {}
+  else if (a9) {}
+  else if (a10) {}
+  else if (a11) {}
+  else if (a12) {}
+  else if (a13) {}
+  else if (a14) {}
+  else if (a15) {}
+  else if (a16) {}
+  else if (a17) {}
+  else if (a18) {}
+  else if (a19) {}
+  else if (a20) {}
+  else if (a21) {}
+  else if (a22) {}
+  else if (a23) {}
+  else if (a24) {}
+  else if (a25) {}
+  else if (a26) {}
+  else if (a27) {}
+  else if (a28) {}
+  else if (a29) {}
+  else if (a30) {}
+  else if (a31) {}
+  else if (a32) {}
+  else if (a33) {}
+  else if (a34) {}
+  else if (a35) {}
+  else if (a36) {}
+  else if (a37) {}
+  else if (a38) {}
+  else if (a39) {}
+  else if (a40) {}
+  else if (a41) {}
+  else if (a42) {}
+  else if (a43) {}
+  else if (a44) {}
+  else if (a45) {}
+  else if (a46) {}
+  else if (a47) {}
+  else if (a48) {}
+  else if (a49) {}
+  else if (a50) {}
+  else if (a51) {}
+  else if (a52) {}
+  else if (a53) {}
+  else if (a54) {}
+  else if (a55) {}
+  else if (a56) {}
+  else if (a57) {}
+  else if (a58) {}
+  else if (a59) {}
+  else if (a60) {}
+  else if (a61) {}
+  else if (a62) {}
+  else if (a63) {}
+  else if (a64) {}
+  else if (a65) {}
+  else if (a66) {}
+  else if (a67) {}
+  else if (a68) {}
+  else if (a69) {}
+  else if (a70) {}
+  else if (a71) {}
+  else if (a72) {}
+  else if (a73) {}
+  else if (a74) {}
+  else if (a75) {}
+  else if (a76) {}
+  else if (a77) {}
+  else if (a78) {}
+  else if (a79) {}
+  else if (a80) {}
+  else if (a81) {}
+  else if (a82) {}
+  else if (a83) {}
+  else if (a84) {}
+  else if (a85) {}
+  else if (a86) {}
+  else if (a87) {}
+  else if (a88) {}
+  else if (a89) {}
+  else if (a90) {}
+  else if (a91) {}
+  else if (a92) {}
+  else if (a93) {}
+  else if (a94) {}
+  else if (a95) {}
+  else if (a96) {}
+  else if (a97) {}
+  else if (a98) {}
+  else if (a99) {}
+  else if (a100) {}
+  else if (b1) {}
+  else if (b2) {}
+  else if (b3) {}
+  else if (b4) {}
+  else if (b5) {}
+  else if (b6) {}
+  else if (b7) {}
+  else if (b8) {}
+  else if (b9) {}
+  else if (b10) {}
+  else if (b11) {}
+  else if (b12) {}
+  else if (b13) {}
+  else if (b14) {}
+  else if (b15) {}
+  else if (b16) {}
+  else if (b17) {}
+  else if (b18) {}
+  else if (b19) {}
+  else if (b20) {}
+  else if (b21) {}
+  else if (b22) {}
+  else if (b23) {}
+  else if (b24) {}
+  else if (b25) {}
+  else if (b26) {}
+  else if (b27) {}
+  else if (b28) {}
+  else if (b29) {}
+  else if (b30) {}
+  else if (b31) {}
+  else if (b32) {}
+  else if (b33) {}
+  else if (b34) {}
+  else if (b35) {}
+  else if (b36) {}
+  else if (b37) {}
+  else if (b38) {}
+  else if (b39) {}
+  else if (b40) {}
+  else if (b41) {}
+  else if (b42) {}
+  else if (b43) {}
+  else if (b44) {}
+  else if (b45) {}
+  else if (b46) {}
+  else if (b47) {}
+  else if (b48) {}
+  else if (b49) {}
+  else if (b50) {}
+  else if (b51) {}
+  else if (b52) {}
+  else if (b53) {}
+  else if (b54) {}
+  else if (b55) {}
+  else if (b56) {}
+  else if (b57) {}
+  else if (b58) {}
+  else if (b59) {}
+  else if (b60) {}
+  else if (b61) {}
+  else if (b62) {}
+  else if (b63) {}
+  else if (b64) {}
+  else if (b65) {}
+  else if (b66) {}
+  else if (b67) {}
+  else if (b68) {}
+  else if (b69) {}
+  else if (b70) {}
+  else if (b71) {}
+  else if (b72) {}
+  else if (b73) {}
+  else if (b74) {}
+  else if (b75) {}
+  else if (b76) {}
+  else if (b77) {}
+  else if (b78) {}
+  else if (b79) {}
+  else if (b80) {}
+  else if (b81) {}
+  else if (b82) {}
+  else if (b83) {}
+  else if (b84) {}
+  else if (b85) {}
+  else if (b86) {}
+  else if (b87) {}
+  else if (b88) {}
+  else if (b89) {}
+  else if (b90) {}
+  else if (b91) {}
+  else if (b92) {}
+  else if (b93) {}
+  else if (b94) {}
+  else if (b95) {}
+  else if (b96) {}
+  else if (b97) {}
+  else if (b98) {}
+  else if (b99) {}
+  else if (b100) {}
+  else if (c1) {}
+  else if (c2) {}
+  else if (c3) {}
+  else if (c4) {}
+  else if (c5) {}
+  else if (c6) {}
+  else if (c7) {}
+  else if (c8) {}
+  else if (c9) {}
+  else if (c10) {}
+  else if (c11) {}
+  else if (c12) {}
+  else if (c13) {}
+  else if (c14) {}
+  else if (c15) {}
+  else if (c16) {}
+  else if (c17) {}
+  else if (c18) {}
+  else if (c19) {}
+  else if (c20) {}
+  else if (c21) {}
+  else if (c22) {}
+  else if (c23) {}
+  else if (c24) {}
+  else if (c25) {}
+  else if (c26) {}
+  else if (c27) {}
+  else if (c28) {}
+  else if (c29) {}
+  else if (c30) {}
+  else if (c31) {}
+  else if (c32) {}
+  else if (c33) {}
+  else if (c34) {}
+  else if (c35) {}
+  else if (c36) {}
+  else if (c37) {}
+  else if (c38) {}
+  else if (c39) {}
+  else if (c40) {}
+  else if (c41) {}
+  else if (c42) {}
+  else if (c43) {}
+  else if (c44) {}
+  else if (c45) {}
+  else if (c46) {}
+  else if (c47) {}
+  else if (c48) {}
+  else if (c49) {}
+  else if (c50) {}
+  else if (c51) {}
+  else if (c52) {}
+  else if (c53) {}
+  else if (c54) {}
+  else if (c55) {}
+  else if (c56) {}
+  else if (c57) {}
+  else if (c58) {}
+  else if (c59) {}
+  else if (c60) {}
+  else if (c61) {}
+  else if (c62) {}
+  else if (c63) {}
+  else if (c64) {}
+  else if (c65) {}
+  else if (c66) {}
+  else if (c67) {}
+  else if (c68) {}
+  else if (c69) {}
+  else if (c70) {}
+  else if (c71) {}
+  else if (c72) {}
+  else if (c73) {}
+  else if (c74) {}
+  else if (c75) {}
+  else if (c76) {}
+  else if (c77) {}
+  else if (c78) {}
+  else if (c79) {}
+  else if (c80) {}
+  else if (c81) {}
+  else if (c82) {}
+  else if (c83) {}
+  else if (c84) {}
+  else if (c85) {}
+  else if (c86) {}
+  else if (c87) {}
+  else if (c88) {}
+  else if (c89) {}
+  else if (c90) {}
+  else if (c91) {}
+  else if (c92) {}
+  else if (c93) {}
+  else if (c94) {}
+  else if (c95) {}
+  else if (c96) {}
+  else if (c97) {}
+  else if (c98) {}
+  else if (c99) {}
+  else if (c100) {}
+  return inIon();
+}
+
+while (!foo()) ;