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merge phi-merge.ll into phi.ll
I don't know what Dan wants to do with phi-merge-gep.ll, I'll let him deal with it because instcombine may end up sinking these. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85739 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1,31 +0,0 @@
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; RUN: opt < %s -instcombine -S | not grep {phi i32}
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; PR1777
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declare i1 @rrr()
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define i1 @zxcv() {
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entry:
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%a = alloca i32
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%i = ptrtoint i32* %a to i32
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%b = call i1 @rrr()
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br i1 %b, label %one, label %two
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one:
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%x = phi i32 [%i, %entry], [%y, %two]
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%c = call i1 @rrr()
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br i1 %c, label %two, label %end
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two:
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%y = phi i32 [%i, %entry], [%x, %one]
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%d = call i1 @rrr()
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br i1 %d, label %one, label %end
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end:
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%f = phi i32 [ %x, %one], [%y, %two]
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; Change the %f to %i, and the optimizer suddenly becomes a lot smarter
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; even though %f must equal %i at this point
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%g = inttoptr i32 %f to i32*
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store i32 10, i32* %g
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%z = call i1 @rrr()
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ret i1 %z
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}
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@ -186,6 +186,39 @@ bb2:
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; CHECK-NEXT: phi i32* [ %B, %bb ], [ %A, %bb1 ]
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; CHECK-NEXT: %E = load i32* %{{[^,]*}}, align 16
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; CHECK-NEXT: ret i32 %E
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}
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; PR1777
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declare i1 @test11a()
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define i1 @test11() {
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entry:
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%a = alloca i32
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%i = ptrtoint i32* %a to i32
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%b = call i1 @test11a()
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br i1 %b, label %one, label %two
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one:
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%x = phi i32 [%i, %entry], [%y, %two]
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%c = call i1 @test11a()
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br i1 %c, label %two, label %end
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two:
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%y = phi i32 [%i, %entry], [%x, %one]
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%d = call i1 @test11a()
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br i1 %d, label %one, label %end
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end:
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%f = phi i32 [ %x, %one], [%y, %two]
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; Change the %f to %i, and the optimizer suddenly becomes a lot smarter
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; even though %f must equal %i at this point
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%g = inttoptr i32 %f to i32*
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store i32 10, i32* %g
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%z = call i1 @test11a()
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ret i1 %z
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; CHECK: @test11
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; CHECK-NOT: phi i32
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; CHECK: ret i1 %z
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}
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