2008-01-02-hoist-fp-add.ll   [plain text]

; The phi should not be eliminated in this case, because the fp op could trap.
; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | grep {= phi double}

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i686-apple-darwin8"
@G = weak global double 0.000000e+00, align 8		; <double*> [#uses=2]

define void @test(i32 %X, i32 %Y, double %Z) {
entry:
	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
	%tmp = load double* @G, align 8		; <double> [#uses=2]
	%tmp3 = icmp eq i32 %X, %Y		; <i1> [#uses=1]
	%tmp34 = zext i1 %tmp3 to i8		; <i8> [#uses=1]
	%toBool = icmp ne i8 %tmp34, 0		; <i1> [#uses=1]
	br i1 %toBool, label %cond_true, label %cond_next

cond_true:		; preds = %entry
	%tmp7 = add double %tmp, %Z		; <double> [#uses=1]
	br label %cond_next

cond_next:		; preds = %cond_true, %entry
	%F.0 = phi double [ %tmp, %entry ], [ %tmp7, %cond_true ]		; <double> [#uses=1]
	store double %F.0, double* @G, align 8
	ret void
}