1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=i686-- | FileCheck %s
3 ; Bug in FindModifiedNodeSlot cause tmp14 load to become a zextload and shr 31
4 ; is then optimized away.
5 @tree_code_type = external dso_local global [0 x i32] ; <ptr> [#uses=1]
7 define void @copy_if_shared_r() {
8 ; CHECK-LABEL: copy_if_shared_r:
10 ; CHECK-NEXT: movl 0, %eax
11 ; CHECK-NEXT: movzbl %al, %ecx
12 ; CHECK-NEXT: movl tree_code_type(,%ecx,4), %ecx
13 ; CHECK-NEXT: decl %ecx
14 ; CHECK-NEXT: cmpl $2, %ecx
15 ; CHECK-NEXT: ja .LBB0_2
16 ; CHECK-NEXT: # %bb.1: # %cond_true
17 ; CHECK-NEXT: shrl $31, %eax
18 ; CHECK-NEXT: testb %al, %al
19 ; CHECK-NEXT: .LBB0_2: # %cond_true17
21 %tmp = load i32, ptr null ; <i32> [#uses=1]
22 %tmp56 = and i32 %tmp, 255 ; <i32> [#uses=1]
23 %gep.upgrd.1 = zext i32 %tmp56 to i64 ; <i64> [#uses=1]
24 %tmp8 = getelementptr [0 x i32], ptr @tree_code_type, i32 0, i64 %gep.upgrd.1 ; <ptr> [#uses=1]
25 %tmp9 = load i32, ptr %tmp8 ; <i32> [#uses=1]
26 %tmp10 = add i32 %tmp9, -1 ; <i32> [#uses=1]
27 %tmp.upgrd.2 = icmp ugt i32 %tmp10, 2 ; <i1> [#uses=1]
28 %tmp14 = load i32, ptr null ; <i32> [#uses=1]
29 %tmp15 = lshr i32 %tmp14, 31 ; <i32> [#uses=1]
30 %tmp15.upgrd.3 = trunc i32 %tmp15 to i8 ; <i8> [#uses=1]
31 %tmp16 = icmp ne i8 %tmp15.upgrd.3, 0 ; <i1> [#uses=1]
32 br i1 %tmp.upgrd.2, label %cond_false25, label %cond_true
33 cond_true: ; preds = %0
34 br i1 %tmp16, label %cond_true17, label %cond_false
35 cond_true17: ; preds = %cond_true
37 cond_false: ; preds = %cond_true
39 cond_false25: ; preds = %0