cff4f04e2e
Scale reg should never be zero, so when the quotient is zero, we cannot assign it there. Limit this transform to avoid this situation. Differential Revision: https://reviews.llvm.org/D128339 Reviewed By: eopXD
40 lines
1.2 KiB
LLVM
40 lines
1.2 KiB
LLVM
; RUN: opt -S -loop-reduce %s | FileCheck %s
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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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; Make sure we don't crash.
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define void @test() {
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; CHECK-LABEL: @test(
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bb:
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%tmp = load atomic i64, i64 addrspace(1)* undef unordered, align 8
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%tmp1 = sub i64 4294967294, undef
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br label %bb5
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bb2: ; No predecessors!
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%tmp3 = add i32 undef, %tmp24
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unreachable
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bb5: ; preds = %bb5, %bb
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%tmp6 = phi i64 [ %tmp18, %bb5 ], [ %tmp, %bb ]
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%tmp7 = phi i32 [ %tmp19, %bb5 ], [ undef, %bb ]
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%tmp8 = phi i32 [ %tmp24, %bb5 ], [ undef, %bb ]
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%tmp9 = sub i32 %tmp8, undef
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%tmp10 = zext i32 %tmp9 to i64
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%tmp11 = add i32 %tmp7, 1
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%tmp12 = zext i32 %tmp11 to i64
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%tmp13 = add i64 %tmp1, %tmp12
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%tmp14 = add i64 %tmp6, %tmp10
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%tmp15 = sub i64 %tmp14, %tmp13
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%tmp16 = trunc i64 %tmp15 to i32
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%tmp17 = add i32 undef, %tmp16
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%tmp18 = add i64 %tmp6, 2
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%tmp19 = add i32 %tmp7, 2
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%tmp20 = xor i64 %tmp6, -1
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%tmp21 = add i64 %tmp1, %tmp20
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%tmp22 = trunc i64 %tmp21 to i32
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%tmp23 = add i32 %tmp19, %tmp22
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%tmp24 = add i32 %tmp17, %tmp23
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br label %bb5
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}
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