derek.holloway
7502bf64a4
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45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; RUN: opt < %s -passes=slsr,gvn -S | FileCheck %s
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; RUN: opt < %s -passes='slsr,gvn' -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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; Do not perform SLSR on &input[s] and &input[s * 2] which fit into addressing
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; modes of X86.
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define i32 @no_slsr_gep(ptr %input, i64 %s) {
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; CHECK-LABEL: @no_slsr_gep(
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; v0 = input[0];
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%v0 = load i32, ptr %input
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; v1 = input[s];
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%p1 = getelementptr inbounds i32, ptr %input, i64 %s
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; CHECK: %p1 = getelementptr inbounds i32, ptr %input, i64 %s
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%v1 = load i32, ptr %p1
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; v2 = input[s * 2];
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%s2 = mul nsw i64 %s, 2
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%p2 = getelementptr inbounds i32, ptr %input, i64 %s2
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; CHECK: %p2 = getelementptr inbounds i32, ptr %input, i64 %s2
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%v2 = load i32, ptr %p2
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; return v0 + v1 + v2;
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%1 = add i32 %v0, %v1
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%2 = add i32 %1, %v2
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ret i32 %2
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}
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define void @no_slsr_add(i32 %b, i32 %s) {
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; CHECK-LABEL: @no_slsr_add(
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%1 = add i32 %b, %s
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; CHECK: add i32 %b, %s
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call void @foo(i32 %1)
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%s2 = mul i32 %s, 2
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; CHECK: %s2 = mul i32 %s, 2
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%2 = add i32 %b, %s2
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; CHECK: add i32 %b, %s2
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call void @foo(i32 %2)
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ret void
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}
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declare void @foo(i32 %a)
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