| ; RUN: opt -basicaa -load-combine -instcombine -S < %s | FileCheck %s |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare void @llvm.assume(i1) nounwind |
| |
| ; 'load' before the 'call' gets optimized: |
| define i64 @test1(i32* nocapture readonly %a, i1 %b) { |
| ; CHECK-LABEL: @test1 |
| |
| ; CHECK-DAG: load i64, i64* %1, align 4 |
| ; CHECK-DAG: tail call void @llvm.assume(i1 %b) |
| ; CHECK: ret i64 |
| |
| %load1 = load i32, i32* %a, align 4 |
| %conv = zext i32 %load1 to i64 |
| %arrayidx1 = getelementptr inbounds i32, i32* %a, i64 1 |
| %load2 = load i32, i32* %arrayidx1, align 4 |
| tail call void @llvm.assume(i1 %b) |
| %conv2 = zext i32 %load2 to i64 |
| %shl = shl nuw i64 %conv2, 32 |
| %add = or i64 %shl, %conv |
| ret i64 %add |
| } |
| |
| ; 'call' before the 'load' doesn't get optimized: |
| define i64 @test2(i32* nocapture readonly %a, i1 %b) { |
| ; CHECK-LABEL: @test2 |
| |
| ; CHECK-DAG: load i64, i64* %1, align 4 |
| ; CHECK-DAG: tail call void @llvm.assume(i1 %b) |
| ; CHECK: ret i64 |
| |
| %load1 = load i32, i32* %a, align 4 |
| %conv = zext i32 %load1 to i64 |
| %arrayidx1 = getelementptr inbounds i32, i32* %a, i64 1 |
| tail call void @llvm.assume(i1 %b) |
| %load2 = load i32, i32* %arrayidx1, align 4 |
| %conv2 = zext i32 %load2 to i64 |
| %shl = shl nuw i64 %conv2, 32 |
| %add = or i64 %shl, %conv |
| ret i64 %add |
| } |
| |