[X86] Add test case I forgot to commit with r312285.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312335 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/pr34381.ll b/test/CodeGen/X86/pr34381.ll
new file mode 100644 (file)
index 0000000..dc5916d
--- /dev/null
+++ b/test/CodeGen/X86/pr34381.ll
@@ -0,0 +1,49 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+;RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=slow-incdec -fast-isel -O0 | FileCheck %s
+
+@var_21 = external constant i32, align 4
+@var_29 = external constant i8, align 1
+@var_390 = external global i32, align 4
+@var_11 = external constant i8, align 1
+@var_370 = external global i8, align 1
+
+; Function Attrs: noinline nounwind optnone uwtable
+define void @_Z3foov() {
+; CHECK-LABEL: _Z3foov:
+; CHECK:       # BB#0: # %entry
+; CHECK-NEXT:    movl {{.*}}(%rip), %eax
+; CHECK-NEXT:    movsbl {{.*}}(%rip), %ecx
+; CHECK-NEXT:    negl %ecx
+; CHECK-NEXT:    subl %ecx, %eax
+; CHECK-NEXT:    setb %dl
+; CHECK-NEXT:    addb $-1, %dl
+; CHECK-NEXT:    sete %sil
+; CHECK-NEXT:    movzbl %sil, %ecx
+; CHECK-NEXT:    movl %ecx, {{.*}}(%rip)
+; CHECK-NEXT:    movb {{.*}}(%rip), %sil
+; CHECK-NEXT:    movsbl %sil, %ecx
+; CHECK-NEXT:    movw %cx, %di
+; CHECK-NEXT:    movb %dil, %sil
+; CHECK-NEXT:    movb %sil, var_370
+; CHECK-NEXT:    movl %eax, -{{[0-9]+}}(%rsp) # 4-byte Spill
+; CHECK-NEXT:    movb %dl, -{{[0-9]+}}(%rsp) # 1-byte Spill
+; CHECK-NEXT:    retq
+entry:
+  %0 = load i32, i32* @var_21, align 4
+  %1 = load i8, i8* @var_29, align 1
+  %conv = sext i8 %1 to i32
+  %sub = sub nsw i32 0, %conv
+  %cmp = icmp ult i32 %0, %sub
+  %conv1 = zext i1 %cmp to i32
+  %add = add nsw i32 %conv1, -1
+  %conv2 = trunc i32 %add to i8
+  %tobool = icmp ne i8 %conv2, 0
+  %lnot = xor i1 %tobool, true
+  %conv3 = zext i1 %lnot to i32
+  store i32 %conv3, i32* @var_390, align 4
+  %2 = load i8, i8* @var_11, align 1
+  %conv4 = sext i8 %2 to i16
+  %conv5 = trunc i16 %conv4 to i8
+  store i8 %conv5, i8* @var_370, align 1
+  ret void
+}