novect-lcssa-cfg-invalidation.ll
1.69 KB
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; RUN: opt -S -passes="loop-vectorize,jump-threading" -debug-pass-manager < %s 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Checks what analyses are invalidated after Loop Vectorization when no actual
; vectorization happens, and the only change LV makes is LCSSA formation.
define i32 @novect(i32* %p) {
; CHECK: Running pass: LoopVectorizePass on novect
; CHECK: Invalidating all non-preserved analyses for: novect
; CHECK: Clearing all analysis results for: <possibly invalidated loop>
; CHECK: Invalidating analysis: ScalarEvolutionAnalysis on novect
; CHECK-NOT: Invalidating analysis: BranchProbabilityAnalysis on novect
; CHECK-NOT: Invalidating analysis: BlockFrequencyAnalysis on novect
; CHECK: Invalidating analysis: DemandedBitsAnalysis on novect
; CHECK: Invalidating analysis: MemorySSAAnalysis on novect
; CHECK: Running pass: JumpThreadingPass on novect
; CHECK: entry:
; CHECK: br label %middle
; CHECK: middle:
; CHECK: %iv = phi i32 [ 0, %entry ], [ %iv.next, %middle ]
; CHECK: %x = load volatile i32, i32* %p
; CHECK: %iv.next = add i32 %iv, 1
; CHECK: %cond = icmp slt i32 %iv, 1000
; CHECK: br i1 %cond, label %exit, label %middle
; CHECK: exit:
; CHECK: %x.lcssa = phi i32 [ %x, %middle ]
; CHECK: ret i32 %x.lcssa
entry:
br label %middle
middle:
%iv = phi i32 [0, %entry], [%iv.next, %middle]
%x = load volatile i32, i32* %p
%iv.next = add i32 %iv, 1
%cond = icmp slt i32 %iv, 1000
br i1 %cond, label %exit, label %middle
exit:
ret i32 %x
}