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00d285aca3
SeparateConstOffsetFromGEP can gives more optimizaiton opportunities related to GEPs, which benefits EarlyCSE and LICM. By enabling these passes we can have better address calculations and generate a better addressing mode. Some SPEC 2006 benchmarks (astar, gobmk, namd) have obvious improvements on Cortex-A57. Reviewed in http://reviews.llvm.org/D5864. llvm-svn: 222331
172 lines
5.8 KiB
LLVM
172 lines
5.8 KiB
LLVM
; RUN: llc -O3 -mtriple arm64-apple-ios3 -aarch64-gep-opt=false %s -o - | FileCheck %s
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; <rdar://problem/13621857>
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@block = common global i8* null, align 8
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define i32 @fct(i32 %i1, i32 %i2) {
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; CHECK: @fct
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; Sign extension is used more than once, thus it should not be folded.
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; CodeGenPrepare is not sharing sext across uses, thus this is folded because
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; of that.
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; _CHECK-NOT_: , sxtw]
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entry:
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%idxprom = sext i32 %i1 to i64
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%0 = load i8** @block, align 8
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%arrayidx = getelementptr inbounds i8* %0, i64 %idxprom
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%1 = load i8* %arrayidx, align 1
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%idxprom1 = sext i32 %i2 to i64
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%arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1
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%2 = load i8* %arrayidx2, align 1
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%cmp = icmp eq i8 %1, %2
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br i1 %cmp, label %if.end, label %if.then
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if.then: ; preds = %entry
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%cmp7 = icmp ugt i8 %1, %2
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%conv8 = zext i1 %cmp7 to i32
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br label %return
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if.end: ; preds = %entry
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%inc = add nsw i32 %i1, 1
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%inc9 = add nsw i32 %i2, 1
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%idxprom10 = sext i32 %inc to i64
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%arrayidx11 = getelementptr inbounds i8* %0, i64 %idxprom10
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%3 = load i8* %arrayidx11, align 1
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%idxprom12 = sext i32 %inc9 to i64
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%arrayidx13 = getelementptr inbounds i8* %0, i64 %idxprom12
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%4 = load i8* %arrayidx13, align 1
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%cmp16 = icmp eq i8 %3, %4
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br i1 %cmp16, label %if.end23, label %if.then18
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if.then18: ; preds = %if.end
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%cmp21 = icmp ugt i8 %3, %4
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%conv22 = zext i1 %cmp21 to i32
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br label %return
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if.end23: ; preds = %if.end
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%inc24 = add nsw i32 %i1, 2
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%inc25 = add nsw i32 %i2, 2
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%idxprom26 = sext i32 %inc24 to i64
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%arrayidx27 = getelementptr inbounds i8* %0, i64 %idxprom26
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%5 = load i8* %arrayidx27, align 1
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%idxprom28 = sext i32 %inc25 to i64
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%arrayidx29 = getelementptr inbounds i8* %0, i64 %idxprom28
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%6 = load i8* %arrayidx29, align 1
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%cmp32 = icmp eq i8 %5, %6
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br i1 %cmp32, label %return, label %if.then34
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if.then34: ; preds = %if.end23
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%cmp37 = icmp ugt i8 %5, %6
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%conv38 = zext i1 %cmp37 to i32
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br label %return
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return: ; preds = %if.end23, %if.then34, %if.then18, %if.then
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%retval.0 = phi i32 [ %conv8, %if.then ], [ %conv22, %if.then18 ], [ %conv38, %if.then34 ], [ 1, %if.end23 ]
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ret i32 %retval.0
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}
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define i32 @fct1(i32 %i1, i32 %i2) optsize {
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; CHECK: @fct1
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; Addressing are folded when optimizing for code size.
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; CHECK: , sxtw]
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; CHECK: , sxtw]
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entry:
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%idxprom = sext i32 %i1 to i64
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%0 = load i8** @block, align 8
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%arrayidx = getelementptr inbounds i8* %0, i64 %idxprom
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%1 = load i8* %arrayidx, align 1
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%idxprom1 = sext i32 %i2 to i64
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%arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1
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%2 = load i8* %arrayidx2, align 1
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%cmp = icmp eq i8 %1, %2
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br i1 %cmp, label %if.end, label %if.then
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if.then: ; preds = %entry
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%cmp7 = icmp ugt i8 %1, %2
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%conv8 = zext i1 %cmp7 to i32
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br label %return
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if.end: ; preds = %entry
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%inc = add nsw i32 %i1, 1
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%inc9 = add nsw i32 %i2, 1
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%idxprom10 = sext i32 %inc to i64
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%arrayidx11 = getelementptr inbounds i8* %0, i64 %idxprom10
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%3 = load i8* %arrayidx11, align 1
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%idxprom12 = sext i32 %inc9 to i64
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%arrayidx13 = getelementptr inbounds i8* %0, i64 %idxprom12
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%4 = load i8* %arrayidx13, align 1
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%cmp16 = icmp eq i8 %3, %4
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br i1 %cmp16, label %if.end23, label %if.then18
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if.then18: ; preds = %if.end
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%cmp21 = icmp ugt i8 %3, %4
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%conv22 = zext i1 %cmp21 to i32
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br label %return
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if.end23: ; preds = %if.end
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%inc24 = add nsw i32 %i1, 2
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%inc25 = add nsw i32 %i2, 2
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%idxprom26 = sext i32 %inc24 to i64
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%arrayidx27 = getelementptr inbounds i8* %0, i64 %idxprom26
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%5 = load i8* %arrayidx27, align 1
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%idxprom28 = sext i32 %inc25 to i64
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%arrayidx29 = getelementptr inbounds i8* %0, i64 %idxprom28
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%6 = load i8* %arrayidx29, align 1
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%cmp32 = icmp eq i8 %5, %6
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br i1 %cmp32, label %return, label %if.then34
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if.then34: ; preds = %if.end23
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%cmp37 = icmp ugt i8 %5, %6
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%conv38 = zext i1 %cmp37 to i32
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br label %return
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return: ; preds = %if.end23, %if.then34, %if.then18, %if.then
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%retval.0 = phi i32 [ %conv8, %if.then ], [ %conv22, %if.then18 ], [ %conv38, %if.then34 ], [ 1, %if.end23 ]
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ret i32 %retval.0
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}
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; CHECK: @test
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; CHECK-NOT: , uxtw #2]
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define i32 @test(i32* %array, i8 zeroext %c, i32 %arg) {
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entry:
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%conv = zext i8 %c to i32
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%add = sub i32 0, %arg
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%tobool = icmp eq i32 %conv, %add
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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%idxprom = zext i8 %c to i64
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%arrayidx = getelementptr inbounds i32* %array, i64 %idxprom
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%0 = load volatile i32* %arrayidx, align 4
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%1 = load volatile i32* %arrayidx, align 4
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%add3 = add nsw i32 %1, %0
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br label %if.end
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if.end: ; preds = %entry, %if.then
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%res.0 = phi i32 [ %add3, %if.then ], [ 0, %entry ]
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ret i32 %res.0
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}
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; CHECK: @test2
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; CHECK: , uxtw #2]
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; CHECK: , uxtw #2]
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define i32 @test2(i32* %array, i8 zeroext %c, i32 %arg) optsize {
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entry:
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%conv = zext i8 %c to i32
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%add = sub i32 0, %arg
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%tobool = icmp eq i32 %conv, %add
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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%idxprom = zext i8 %c to i64
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%arrayidx = getelementptr inbounds i32* %array, i64 %idxprom
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%0 = load volatile i32* %arrayidx, align 4
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%1 = load volatile i32* %arrayidx, align 4
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%add3 = add nsw i32 %1, %0
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br label %if.end
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if.end: ; preds = %entry, %if.then
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%res.0 = phi i32 [ %add3, %if.then ], [ 0, %entry ]
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ret i32 %res.0
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}
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