39 lines
1.3 KiB
LLVM
39 lines
1.3 KiB
LLVM
; RUN: opt < %s -indvars -replexitval=always -S | FileCheck %s --check-prefix=ALWAYS
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; RUN: opt < %s -indvars -replexitval=never -S | FileCheck %s --check-prefix=NEVER
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; RUN: opt < %s -indvars -replexitval=cheap -scev-cheap-expansion-budget=1 -S | FileCheck %s --check-prefix=CHEAP
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; rewriteLoopExitValues() must rewrite all or none of a PHI's values from a given block.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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@a = common global i8 0, align 1
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define internal fastcc void @d(i8* %c) unnamed_addr #0 {
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entry:
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%cmp = icmp ule i8* %c, getelementptr inbounds (i8, i8* @a, i64 65535)
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%add.ptr = getelementptr inbounds i8, i8* %c, i64 -65535
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br label %while.cond
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while.cond:
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br i1 icmp ne (i8 0, i8 0), label %cont, label %while.end
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cont:
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%a.mux = select i1 %cmp, i8* @a, i8* %add.ptr
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switch i64 0, label %while.cond [
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i64 -1, label %handler.pointer_overflow.i
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i64 0, label %handler.pointer_overflow.i
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]
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handler.pointer_overflow.i:
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%a.mux.lcssa4 = phi i8* [ %a.mux, %cont ], [ %a.mux, %cont ]
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; ALWAYS: [ %scevgep, %cont ], [ %scevgep, %cont ]
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; NEVER: [ %a.mux, %cont ], [ %a.mux, %cont ]
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; In cheap mode, use either one as long as it's consistent.
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; CHEAP: [ %[[VAL:.*]], %cont ], [ %[[VAL]], %cont ]
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%x5 = ptrtoint i8* %a.mux.lcssa4 to i64
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br label %while.end
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while.end:
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ret void
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}
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