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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
68 lines
2.3 KiB
LLVM
68 lines
2.3 KiB
LLVM
; RUN: opt < %s -newgvn
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; PR7052
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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-unknown-linux-gnu"
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define i32 @main(i32 %argc, i8** nocapture %argv) personality i32 (...)* @__gxx_personality_v0 {
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entry:
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%0 = getelementptr inbounds i8, i8* undef, i64 5 ; <i8*> [#uses=1]
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%1 = bitcast i8* %0 to i32* ; <i32*> [#uses=1]
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store i32 undef, i32* %1, align 1
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br i1 undef, label %k121.i.i, label %l117.i.i
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l117.i.i: ; preds = %entry
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invoke fastcc void @foo()
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to label %.noexc5 unwind label %landing_pad
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.noexc5: ; preds = %l117.i.i
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unreachable
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k121.i.i: ; preds = %entry
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br i1 undef, label %l129.i.i, label %k133.i.i
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l129.i.i: ; preds = %k121.i.i
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invoke fastcc void @foo()
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to label %.noexc7 unwind label %landing_pad
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.noexc7: ; preds = %l129.i.i
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unreachable
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k133.i.i: ; preds = %k121.i.i
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%2 = getelementptr i8, i8* undef, i64 5 ; <i8*> [#uses=1]
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%3 = bitcast i8* %2 to i1* ; <i1*> [#uses=1]
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%4 = load i1, i1* %3 ; <i1> [#uses=1]
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br i1 %4, label %k151.i.i, label %l147.i.i
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l147.i.i: ; preds = %k133.i.i
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invoke fastcc void @foo()
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to label %.noexc10 unwind label %landing_pad
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.noexc10: ; preds = %l147.i.i
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unreachable
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k151.i.i: ; preds = %k133.i.i
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ret i32 0
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landing_pad: ; preds = %l147.i.i, %l129.i.i, %l117.i.i
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%exn = landingpad {i8*, i32}
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cleanup
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switch i32 undef, label %fin [
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i32 1, label %catch1
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i32 2, label %catch
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]
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fin: ; preds = %landing_pad
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unreachable
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catch: ; preds = %landing_pad
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ret i32 1
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catch1: ; preds = %landing_pad
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ret i32 2
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}
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declare fastcc void @foo()
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declare i32 @__gxx_personality_v0(...)
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