48 lines
1.2 KiB
LLVM
48 lines
1.2 KiB
LLVM
; RUN: opt -S -passes='loop(indvars)' -verify-scev < %s | FileCheck %s
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; REQUIRES: asserts
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; XFAIL: *
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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-ni:1-p2:32:8:8:32-ni:2"
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target triple = "x86_64-unknown-linux-gnu"
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define void @test_01(i1 %b) {
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; CHECK-LABEL: test_01
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entry:
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%b.ext = zext i1 %b to i32
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%zero = and i32 %b.ext, 2
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%precond = icmp ne i32 %zero, 0
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call void @llvm.assume(i1 %precond)
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br label %loop
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loop:
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%iv = phi i16 [ 0, %entry ], [ %iv.next, %loop ]
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%iv.next = add i16 %iv, 1
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%cond = icmp slt i16 %iv, 1
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_02() {
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; CHECK-LABEL: test_02
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entry:
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%tmp = and i1 false, undef
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br i1 %tmp, label %preheader, label %unreached
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preheader: ; preds = %entry
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br label %loop
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loop: ; preds = %loop, %preheader
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%tmp3 = phi i32 [ 2, %preheader ], [ %tmp4, %loop ]
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%tmp4 = add nuw nsw i32 %tmp3, 1
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%tmp5 = icmp ugt i32 %tmp3, 74
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br i1 %tmp5, label %unreached, label %loop
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unreached: ; preds = %loop
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unreachable
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}
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declare void @llvm.assume(i1)
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