; that it's conditionally evaluated.
; CHECK: foo:
-; CHECK: divsd
; CHECK-NEXT: testb $1, %dil
-; CHECK-NEXT: jne
+; CHECK-NEXT: je
; CHECK-NEXT: divsd
+; CHECK-NEXT: ret
+; CHECK: divsd
define double @foo(double %x, double %y, i1 %c) nounwind {
%a = fdiv double %x, 3.2
ret double %z
}
+; Make sure the critical edge is broken so the divsd is sunken below
+; the conditional branch.
+; rdar://8454886
+
+; CHECK: split:
+; CHECK-NEXT: testb $1, %dil
+; CHECK-NEXT: je
+; CHECK-NEXT: divsd
+; CHECK-NEXT: ret
+; CHECK: movaps
+; CHECK-NEXT: ret
+define double @split(double %x, double %y, i1 %c) nounwind {
+ %a = fdiv double %x, 3.2
+ %z = select i1 %c, double %a, double %y
+ ret double %z
+}
+
+
; Hoist floating-point constant-pool loads out of loops.
; CHECK: bar:
; Sink instructions with dead EFLAGS defs.
-; CHECK: zzz:
-; CHECK: je
-; CHECK-NEXT: orb
-
-define zeroext i8 @zzz(i8 zeroext %a, i8 zeroext %b) nounwind readnone {
-entry:
- %tmp = zext i8 %a to i32 ; <i32> [#uses=1]
- %tmp2 = icmp eq i8 %a, 0 ; <i1> [#uses=1]
- %tmp3 = or i8 %b, -128 ; <i8> [#uses=1]
- %tmp4 = and i8 %b, 127 ; <i8> [#uses=1]
- %b_addr.0 = select i1 %tmp2, i8 %tmp4, i8 %tmp3 ; <i8> [#uses=1]
- ret i8 %b_addr.0
-}
+; FIXME: Unfail the zzz test if we can correctly mark pregs with the kill flag.
+;
+; See <rdar://problem/8030636>. This test isn't valid after we made machine
+; sinking more conservative about sinking instructions that define a preg into a
+; block when we don't know if the preg is killed within the current block.
+
+
+; FIXMEHECK: zzz:
+; FIXMEHECK: je
+; FIXMEHECK-NEXT: orb
+
+; define zeroext i8 @zzz(i8 zeroext %a, i8 zeroext %b) nounwind readnone {
+; entry:
+; %tmp = zext i8 %a to i32 ; <i32> [#uses=1]
+; %tmp2 = icmp eq i8 %a, 0 ; <i1> [#uses=1]
+; %tmp3 = or i8 %b, -128 ; <i8> [#uses=1]
+; %tmp4 = and i8 %b, 127 ; <i8> [#uses=1]
+; %b_addr.0 = select i1 %tmp2, i8 %tmp4, i8 %tmp3 ; <i8> [#uses=1]
+; ret i8 %b_addr.0
+; }
; Codegen should hoist and CSE these constants.