64 lines
1.8 KiB
LLVM
64 lines
1.8 KiB
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 i64 @test1(i32* nocapture readonly noalias %a, i32* nocapture readonly noalias %b) {
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; CHECK-LABEL: @test1
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; CHECK: load i64, i64*
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; CHECK: ret i64
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%load1 = load i32, i32* %a, align 4
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%conv = zext i32 %load1 to i64
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i64 1
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store i32 %load1, i32* %b, align 4
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%load2 = load i32, i32* %arrayidx1, align 4
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%conv2 = zext i32 %load2 to i64
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%shl = shl nuw i64 %conv2, 32
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%add = or i64 %shl, %conv
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ret i64 %add
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}
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define i64 @test2(i32* nocapture readonly %a, i32* nocapture readonly %b) {
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; CHECK-LABEL: @test2
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; CHECK-NOT: load i64
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; CHECK: load i32, i32*
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; CHECK: load i32, i32*
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; CHECK: ret i64
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%load1 = load i32, i32* %a, align 4
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%conv = zext i32 %load1 to i64
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i64 1
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store i32 %load1, i32* %b, align 4
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%load2 = load i32, i32* %arrayidx1, align 4
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%conv2 = zext i32 %load2 to i64
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%shl = shl nuw i64 %conv2, 32
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%add = or i64 %shl, %conv
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ret i64 %add
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}
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%rec11 = type { i16, i16, i16 }
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@str = global %rec11 { i16 1, i16 2, i16 3 }
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; PR31517 - Check that loads which span an aliasing store are not combined.
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define i16 @test3() {
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; CHECK-LABEL: @test3
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; CHECK-NOT: load i32
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; CHECK: load i16, i16*
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; CHECK: store i16
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; CHECK: load i16, i16*
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; CHECK: ret i16
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%_tmp9 = getelementptr %rec11, %rec11* @str, i16 0, i32 1
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%_tmp10 = load i16, i16* %_tmp9
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%_tmp12 = getelementptr %rec11, %rec11* @str, i16 0, i32 0
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store i16 %_tmp10, i16* %_tmp12
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%_tmp13 = getelementptr %rec11, %rec11* @str, i16 0, i32 0
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%_tmp14 = load i16, i16* %_tmp13
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%_tmp15 = icmp eq i16 %_tmp14, 3
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%_tmp16 = select i1 %_tmp15, i16 1, i16 0
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ret i16 %_tmp16
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}
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