1 ; RUN: llc -mtriple arm-eabi -mcpu swift -verify-machineinstrs %s -o /dev/null 2 3 declare i32 @f(i32 %p0, i32 %p1) 4 5 define i32 @foo(i32* %ptr) { 6 entry: 7 %cmp = icmp ne i32* %ptr, null 8 br i1 %cmp, label %if.then, label %if.else 9 10 ; present something which can be easily if-converted 11 if.then: 12 ; %R0 should be killed here 13 %valt = load i32, i32* %ptr, align 4 14 br label %return 15 16 if.else: 17 ; %R0 should be killed here, however after if-conversion the %R0 kill 18 ; has to be removed because if.then will follow after this and still 19 ; read it. 20 %addr = getelementptr inbounds i32, i32* %ptr, i32 4 21 %vale = load i32, i32* %addr, align 4 22 br label %return 23 24 return: 25 %phival = phi i32 [ %valt, %if.then ], [ %vale, %if.else ] 26 ; suggest to bring %phival/%valt/%vale into %R1 (because otherwise there 27 ; will be no kills in if.then/if.else) 28 %retval = call i32 @f (i32 0, i32 %phival) 29 ret i32 %retval 30 } 31
