Reapply r233175 and r233183: float2int.
This re-adds float2int to the tree, after fixing PR23038. It turns
out the argument to APSInt() is true-if-unsigned, rather than
true-if-signed :(. Added testcase and explanatory comment.
llvm-svn: 233370
diff --git a/llvm/test/Transforms/Float2Int/toolarge.ll b/llvm/test/Transforms/Float2Int/toolarge.ll
new file mode 100644
index 0000000..b5d7781
--- /dev/null
+++ b/llvm/test/Transforms/Float2Int/toolarge.ll
@@ -0,0 +1,16 @@
+; RUN: opt < %s -float2int -float2int-max-integer-bw=256 -S | FileCheck %s
+
+; CHECK-LABEL: @neg_toolarge
+; CHECK: %1 = uitofp i80 %a to fp128
+; CHECK: %2 = fadd fp128 %1, %1
+; CHECK: %3 = fptoui fp128 %2 to i80
+; CHECK: ret i80 %3
+; fp128 has a 112-bit mantissa, which can hold an i80. But we only support
+; up to i64, so it should fail (even though the max integer bitwidth is 256).
+define i80 @neg_toolarge(i80 %a) {
+ %1 = uitofp i80 %a to fp128
+ %2 = fadd fp128 %1, %1
+ %3 = fptoui fp128 %2 to i80
+ ret i80 %3
+}
+