llvm.org GIT mirror llvm / release_80 test / CodeGen / ARM / ifconv-kills.ll

Tree @release_80 (Download .tar.gz)

ifconv-kills.ll @release_80raw · history · blame

; RUN: llc -mtriple arm-eabi -mcpu swift -verify-machineinstrs %s -o /dev/null

declare i32 @f(i32 %p0, i32 %p1)

define i32 @foo(i32* %ptr) {
  %cmp = icmp ne i32* %ptr, null
  br i1 %cmp, label %if.then, label %if.else

; present something which can be easily if-converted
  ; %R0 should be killed here
  %valt = load i32, i32* %ptr, align 4
  br label %return

  ; %R0 should be killed here, however after if-conversion the %R0 kill
  ; has to be removed because if.then will follow after this and still
  ; read it.
  %addr = getelementptr inbounds i32, i32* %ptr, i32 4
  %vale = load i32, i32* %addr, align 4
  br label %return

  %phival = phi i32 [ %valt, %if.then ], [ %vale, %if.else ]
  ; suggest to bring %phival/%valt/%vale into %R1 (because otherwise there
  ; will be no kills in if.then/if.else)
  %retval = call i32 @f (i32 0, i32 %phival)
  ret i32 %retval