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https://github.com/RPCS3/llvm-mirror.git
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bd0298b1e1
The code have been developed by Daniel Berlin over the years, and the new implementation goal is that of addressing shortcomings of the current GVN infrastructure, i.e. long compile time for large testcases, lack of phi predication, no load/store value numbering etc... The current code just implements the "core" GVN algorithm, although other pieces (load coercion, phi handling, predicate system) are already implemented in a branch out of tree. Once the core is stable, we'll start adding pieces on top of the base framework. The test currently living in test/Transform/NewGVN are a copy of the ones in GVN, with proper `XFAIL` (missing features in NewGVN). A flag will be added in a future commit to enable NewGVN, so that interested parties can exercise this code easily. Differential Revision: https://reviews.llvm.org/D26224 llvm-svn: 290346
109 lines
3.7 KiB
LLVM
109 lines
3.7 KiB
LLVM
;RUN: opt -newgvn -S < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n8:16:32-S64"
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target triple = "thumbv7--linux-gnueabi"
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%struct.a = type { i16, i16, [1 x %union.a] }
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%union.a = type { i32 }
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@length = external global [0 x i32], align 4
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; Function Attrs: nounwind
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define fastcc void @foo(%struct.a* nocapture readonly %x) {
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;CHECK-LABEL: foo
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entry:
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br label %bb0
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bb0: ; preds = %land.lhs.true, %entry
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;CHECK: bb0:
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%x.tr = phi %struct.a* [ %x, %entry ], [ null, %land.lhs.true ]
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%code1 = getelementptr inbounds %struct.a, %struct.a* %x.tr, i32 0, i32 0
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%0 = load i16, i16* %code1, align 4
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; CHECK: load i16, i16*
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%conv = zext i16 %0 to i32
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switch i32 %conv, label %if.end.50 [
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i32 43, label %cleanup
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i32 52, label %if.then.5
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]
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if.then.5: ; preds = %bb0
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br i1 undef, label %land.lhs.true, label %if.then.26
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land.lhs.true: ; preds = %if.then.5
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br i1 undef, label %cleanup, label %bb0
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if.then.26: ; preds = %if.then.5
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%x.tr.lcssa163 = phi %struct.a* [ %x.tr, %if.then.5 ]
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br i1 undef, label %cond.end, label %cond.false
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cond.false: ; preds = %if.then.26
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; CHECK: cond.false:
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; CHECK: load i16
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%mode = getelementptr inbounds %struct.a, %struct.a* %x.tr.lcssa163, i32 0, i32 1
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%bf.load = load i16, i16* %mode, align 2
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%bf.shl = shl i16 %bf.load, 8
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br label %cond.end
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cond.end: ; preds = %cond.false, %if.then.26
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br i1 undef, label %if.then.44, label %cleanup
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if.then.44: ; preds = %cond.end
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unreachable
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if.end.50: ; preds = %bb0
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;%CHECK: if.end.50:
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%conv.lcssa = phi i32 [ %conv, %bb0 ]
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%arrayidx52 = getelementptr inbounds [0 x i32], [0 x i32]* @length, i32 0, i32 %conv.lcssa
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%1 = load i32, i32* %arrayidx52, align 4
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br i1 undef, label %for.body.57, label %cleanup
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for.body.57: ; preds = %if.end.50
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%i.2157 = add nsw i32 %1, -1
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unreachable
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cleanup: ; preds = %if.end.50, %cond.end, %land.lhs.true, %bb0
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ret void
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}
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@yy_c_buf_p = external unnamed_addr global i8*, align 4
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@dfg_text = external global i8*, align 4
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define void @dfg_lex() {
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;CHECK-LABEL: dfg_lex
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entry:
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br label %while.bodythread-pre-split
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while.bodythread-pre-split: ; preds = %while.end, %while.end, %entry
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br i1 undef, label %if.then.14, label %if.end.15
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if.then.14: ; preds = %while.end, %while.bodythread-pre-split
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%v1 = load i32, i32* bitcast (i8** @dfg_text to i32*), align 4
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%sub.ptr.sub = sub i32 undef, %v1
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br label %if.end.15
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if.end.15: ; preds = %if.then.14, %while.bodythread-pre-split
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%v2 = load i8*, i8** @yy_c_buf_p, align 4
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br label %while.cond.16
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while.cond.16: ; preds = %while.cond.16, %if.end.15
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br i1 undef, label %while.cond.16, label %while.end
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while.end: ; preds = %while.cond.16
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%add.ptr = getelementptr inbounds i8, i8* %v2, i32 undef
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store i8* %add.ptr, i8** @dfg_text, align 4
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%sub.ptr.rhs.cast25 = ptrtoint i8* %add.ptr to i32
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%sub.ptr.sub26 = sub i32 0, %sub.ptr.rhs.cast25
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switch i32 undef, label %sw.default [
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i32 65, label %while.bodythread-pre-split
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i32 3, label %return
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i32 57, label %while.bodythread-pre-split
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i32 60, label %if.then.14
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]
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sw.default: ; preds = %while.end
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unreachable
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return: ; preds = %while.end
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ret void
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}
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