floating-point-iv.ll   [plain text]

; RUN: opt < %s -indvars -S | FileCheck %s
define void @test1() nounwind {
entry:
	br label %bb

bb:		; preds = %bb, %entry
	%x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]		; <double> [#uses=2]
	%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind		; <i32> [#uses=0]
	%1 = fadd double %x.0.reg2mem.0, 1.000000e+00		; <double> [#uses=2]
	%2 = fcmp olt double %1, 1.000000e+04		; <i1> [#uses=1]
	br i1 %2, label %bb, label %return

return:		; preds = %bb
	ret void
; CHECK: @test1
; CHECK: icmp
}

declare i32 @foo(double)

define void @test2() nounwind {
entry:
	br label %bb

bb:		; preds = %bb, %entry
	%x.0.reg2mem.0 = phi double [ -10.000000e+00, %entry ], [ %1, %bb ]		; <double> [#uses=2]
	%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind		; <i32> [#uses=0]
	%1 = fadd double %x.0.reg2mem.0, 2.000000e+00		; <double> [#uses=2]
	%2 = fcmp olt double %1, -1.000000e+00		; <i1> [#uses=1]
	br i1 %2, label %bb, label %return

return:		; preds = %bb
	ret void
; CHECK: @test2
; CHECK: icmp
}


define void @test3() nounwind {
entry:
	br label %bb

bb:		; preds = %bb, %entry
	%x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
	%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind
	%1 = fadd double %x.0.reg2mem.0, 1.000000e+00
	%2 = fcmp olt double %1, -1.000000e+00
	br i1 %2, label %bb, label %return

return:
	ret void
; CHECK: @test3
; CHECK: fcmp
}

define void @test4() nounwind {
entry:
	br label %bb

bb:		; preds = %bb, %entry
	%x.0.reg2mem.0 = phi double [ 40.000000e+00, %entry ], [ %1, %bb ]		; <double> [#uses=2]
	%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind		; <i32> [#uses=0]
	%1 = fadd double %x.0.reg2mem.0, -1.000000e+00		; <double> [#uses=2]
	%2 = fcmp olt double %1, 1.000000e+00		; <i1> [#uses=1]
	br i1 %2, label %bb, label %return

return:
	ret void
; CHECK: @test4
; CHECK-NOT: cmp
; CHECK: br i1 false
}

; PR6761
define void @test5() nounwind {
; <label>:0
  br label %1

; <label>:1                                       ; preds = %1, %0
  %2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ] ; <double> [#uses=1]
  %3 = tail call i32 @foo(double 0.0)              ; <i32> [#uses=0]
  %4 = fadd double %2, -1.000000e+00              ; <double> [#uses=2]
  %5 = fcmp ult double %4, 0.000000e+00           ; <i1> [#uses=1]
  br i1 %5, label %exit, label %1

exit:
  ret void

; CHECK: @test5
; CHECK: icmp slt i32 {{.*}}, 0
; CHECK-NEXT: br i1
}