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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
55 lines
1.7 KiB
LLVM
55 lines
1.7 KiB
LLVM
; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-macosx10.7.0"
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; rdar://12801584
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; Value of %shouldExit can be changed by RunInMode.
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; Make sure we do not replace load %shouldExit in while.cond.backedge
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; with a phi node where the value from while.body is 0.
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define i32 @test() nounwind ssp {
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entry:
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; CHECK: test()
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; CHECK: while.body:
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; CHECK: call void @RunInMode
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; CHECK: br i1 %tobool, label %while.cond.backedge, label %if.then
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; CHECK: while.cond.backedge:
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; CHECK: load i32, i32* %shouldExit
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; CHECK: br i1 %cmp, label %while.body
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%shouldExit = alloca i32, align 4
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%tasksIdle = alloca i32, align 4
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store i32 0, i32* %shouldExit, align 4
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store i32 0, i32* %tasksIdle, align 4
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call void @CTestInitialize(i32* %tasksIdle) nounwind
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%0 = load i32, i32* %shouldExit, align 4
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%cmp1 = icmp eq i32 %0, 0
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br i1 %cmp1, label %while.body.lr.ph, label %while.end
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while.body.lr.ph:
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br label %while.body
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while.body:
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call void @RunInMode(i32 100) nounwind
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%1 = load i32, i32* %tasksIdle, align 4
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%tobool = icmp eq i32 %1, 0
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br i1 %tobool, label %while.cond.backedge, label %if.then
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if.then:
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store i32 0, i32* %tasksIdle, align 4
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call void @TimerCreate(i32* %shouldExit) nounwind
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br label %while.cond.backedge
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while.cond.backedge:
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%2 = load i32, i32* %shouldExit, align 4
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%cmp = icmp eq i32 %2, 0
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br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
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while.cond.while.end_crit_edge:
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br label %while.end
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while.end:
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ret i32 0
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}
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declare void @CTestInitialize(i32*)
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declare void @RunInMode(i32)
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declare void @TimerCreate(i32*)
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