Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6
2019-07-26 19:53:28 +00:00
parent e9207cf623
commit ef583813eb
2712 changed files with 74169 additions and 40587 deletions
--- a/external/llvm/test/CodeGen/X86/fast-isel-shift.ll
+++ b/external/llvm/test/CodeGen/X86/fast-isel-shift.ll
@@ -381,3 +381,15 @@ define i64 @ashr_imm4_i64(i64 %a) {
  %c = ashr i64 %a, 4
  ret i64 %c
 }
+
+; Make sure we don't crash on out of bounds i8 shifts.
+define i8 @PR36731(i8 %a) {
+; CHECK-LABEL: PR36731:
+; CHECK:       ## %bb.0:
+; CHECK-NEXT:    movb $255, %cl
+; CHECK-NEXT:    shlb %cl, %dil
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    retq
+  %b = shl i8 %a, -1
+  ret i8 %b
+}