test/CodeGen/X86/nobt.ll

; 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
; 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
; 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
; 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
; 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()