| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=i686-- | FileCheck %s |
| |
| ; This tests some cases where BT must not be generated. See also bt.ll. |
| ; Fixes 20040709-[12].c in gcc testsuite. |
| |
| define void @test2(i32 %x, i32 %n) nounwind { |
| ; CHECK-LABEL: test2: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: testb %al, %al |
| ; CHECK-NEXT: jne .LBB0_2 |
| ; CHECK-NEXT: # %bb.1: # %bb |
| ; CHECK-NEXT: calll foo@PLT |
| ; CHECK-NEXT: .LBB0_2: # %UnifiedReturnBlock |
| ; CHECK-NEXT: retl |
| entry: |
| %tmp1 = and i32 %x, 1 |
| %tmp2 = urem i32 %tmp1, 15 |
| %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| %tmp4 = icmp eq i32 %tmp3, %tmp2 ; <i1> [#uses=1] |
| br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| |
| bb: ; preds = %entry |
| call void @foo() |
| ret void |
| |
| UnifiedReturnBlock: ; preds = %entry |
| ret void |
| } |
| |
| define void @test3(i32 %x, i32 %n) nounwind { |
| ; CHECK-LABEL: test3: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: testb %al, %al |
| ; CHECK-NEXT: jne .LBB1_2 |
| ; CHECK-NEXT: # %bb.1: # %bb |
| ; CHECK-NEXT: calll foo@PLT |
| ; CHECK-NEXT: .LBB1_2: # %UnifiedReturnBlock |
| ; CHECK-NEXT: retl |
| entry: |
| %tmp1 = and i32 %x, 1 |
| %tmp2 = urem i32 %tmp1, 15 |
| %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| %tmp4 = icmp eq i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| |
| bb: ; preds = %entry |
| call void @foo() |
| ret void |
| |
| UnifiedReturnBlock: ; preds = %entry |
| ret void |
| } |
| |
| define void @test4(i32 %x, i32 %n) nounwind { |
| ; CHECK-LABEL: test4: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: movb $1, %al |
| ; CHECK-NEXT: testb %al, %al |
| ; CHECK-NEXT: jne .LBB2_2 |
| ; CHECK-NEXT: # %bb.1: # %bb |
| ; CHECK-NEXT: calll foo@PLT |
| ; CHECK-NEXT: .LBB2_2: # %UnifiedReturnBlock |
| ; CHECK-NEXT: retl |
| entry: |
| %tmp1 = and i32 %x, 1 |
| %tmp2 = urem i32 %tmp1, 15 |
| %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| |
| bb: ; preds = %entry |
| call void @foo() |
| ret void |
| |
| UnifiedReturnBlock: ; preds = %entry |
| ret void |
| } |
| |
| define void @test5(i32 %x, i32 %n) nounwind { |
| ; CHECK-LABEL: test5: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: movb $1, %al |
| ; CHECK-NEXT: testb %al, %al |
| ; CHECK-NEXT: jne .LBB3_2 |
| ; CHECK-NEXT: # %bb.1: # %bb |
| ; CHECK-NEXT: calll foo@PLT |
| ; CHECK-NEXT: .LBB3_2: # %UnifiedReturnBlock |
| ; CHECK-NEXT: retl |
| entry: |
| %tmp1 = and i32 %x, 1 |
| %tmp2 = urem i32 %tmp1, 15 |
| %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| |
| bb: ; preds = %entry |
| call void @foo() |
| ret void |
| |
| UnifiedReturnBlock: ; preds = %entry |
| ret void |
| } |
| |
| declare void @foo() |