20 lines
719 B
LLVM
20 lines
719 B
LLVM
; RUN: opt -basicaa -load-combine -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @Load_NegGep(i32* %i){
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%1 = getelementptr inbounds i32, i32* %i, i64 -1
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%2 = load i32, i32* %1, align 4
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%3 = load i32, i32* %i, align 4
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%4 = add nsw i32 %3, %2
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ret i32 %4
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; CHECK-LABEL: @Load_NegGep(
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; CHECK: %[[load:.*]] = load i64
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; CHECK: %[[combine_extract_lo:.*]] = trunc i64 %[[load]] to i32
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; CHECK: %[[combine_extract_shift:.*]] = lshr i64 %[[load]], 32
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; CHECK: %[[combine_extract_hi:.*]] = trunc i64 %[[combine_extract_shift]] to i32
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; CHECK: %[[add:.*]] = add nsw i32 %[[combine_extract_hi]], %[[combine_extract_lo]]
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}
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