mirror of
https://github.com/c64scene-ar/llvm-6502.git
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a1af757e0a
compute an upper-bound value for the trip count, in addition to the actual trip count. Use this to allow getZeroExtendExpr and getSignExtendExpr to fold casts in more cases. This may eventually morph into a more general value-range analysis capability; there are certainly plenty of places where more complete value-range information would allow more folding. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70509 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
3.3 KiB
LLVM
75 lines
3.3 KiB
LLVM
; RUN: llvm-as < %s | opt -scalar-evolution -analyze -disable-output \
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; RUN: | grep {backedge-taken count is ((64 + (-64 smax (-1 + (-1 \\* %0))) + %0) /u 64)}
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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"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct.FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] }
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%struct.SHA_INFO = type { [5 x i32], i32, i32, [16 x i32] }
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%struct._IO_marker = type { %struct._IO_marker*, %struct.FILE*, i32 }
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@_2E_str = external constant [26 x i8] ; <[26 x i8]*> [#uses=0]
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@stdin = external global %struct.FILE* ; <%struct.FILE**> [#uses=0]
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@_2E_str1 = external constant [3 x i8] ; <[3 x i8]*> [#uses=0]
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@_2E_str12 = external constant [30 x i8] ; <[30 x i8]*> [#uses=0]
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declare void @sha_init(%struct.SHA_INFO* nocapture) nounwind
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declare fastcc void @sha_transform(%struct.SHA_INFO* nocapture) nounwind
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declare void @sha_print(%struct.SHA_INFO* nocapture) nounwind
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declare i32 @printf(i8* nocapture, ...) nounwind
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declare void @sha_final(%struct.SHA_INFO* nocapture) nounwind
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declare void @llvm.memset.i64(i8* nocapture, i8, i64, i32) nounwind
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declare void @sha_update(%struct.SHA_INFO* nocapture, i8* nocapture, i32) nounwind
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declare void @llvm.memcpy.i64(i8* nocapture, i8* nocapture, i64, i32) nounwind
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declare i64 @fread(i8* noalias nocapture, i64, i64, %struct.FILE* noalias nocapture) nounwind
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declare i32 @main(i32, i8** nocapture) nounwind
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declare noalias %struct.FILE* @fopen(i8* noalias nocapture, i8* noalias nocapture) nounwind
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declare i32 @fclose(%struct.FILE* nocapture) nounwind
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declare void @sha_stream(%struct.SHA_INFO* nocapture, %struct.FILE* nocapture) nounwind
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define void @sha_stream_bb3_2E_i(%struct.SHA_INFO* %sha_info, i8* %data1, i32, i8** %buffer_addr.0.i.out, i32* %count_addr.0.i.out) nounwind {
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newFuncRoot:
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br label %bb3.i
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sha_update.exit.exitStub: ; preds = %bb3.i
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store i8* %buffer_addr.0.i, i8** %buffer_addr.0.i.out
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store i32 %count_addr.0.i, i32* %count_addr.0.i.out
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ret void
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bb2.i: ; preds = %bb3.i
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%1 = getelementptr %struct.SHA_INFO* %sha_info, i64 0, i32 3 ; <[16 x i32]*> [#uses=1]
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%2 = bitcast [16 x i32]* %1 to i8* ; <i8*> [#uses=1]
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call void @llvm.memcpy.i64(i8* %2, i8* %buffer_addr.0.i, i64 64, i32 1) nounwind
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%3 = getelementptr %struct.SHA_INFO* %sha_info, i64 0, i32 3, i64 0 ; <i32*> [#uses=1]
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%4 = bitcast i32* %3 to i8* ; <i8*> [#uses=1]
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br label %codeRepl
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codeRepl: ; preds = %bb2.i
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call void @sha_stream_bb3_2E_i_bb1_2E_i_2E_i(i8* %4)
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br label %byte_reverse.exit.i
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byte_reverse.exit.i: ; preds = %codeRepl
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call fastcc void @sha_transform(%struct.SHA_INFO* %sha_info) nounwind
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%5 = getelementptr i8* %buffer_addr.0.i, i64 64 ; <i8*> [#uses=1]
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%6 = add i32 %count_addr.0.i, -64 ; <i32> [#uses=1]
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br label %bb3.i
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bb3.i: ; preds = %byte_reverse.exit.i, %newFuncRoot
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%buffer_addr.0.i = phi i8* [ %data1, %newFuncRoot ], [ %5, %byte_reverse.exit.i ] ; <i8*> [#uses=3]
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%count_addr.0.i = phi i32 [ %0, %newFuncRoot ], [ %6, %byte_reverse.exit.i ] ; <i32> [#uses=3]
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%7 = icmp sgt i32 %count_addr.0.i, 63 ; <i1> [#uses=1]
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br i1 %7, label %bb2.i, label %sha_update.exit.exitStub
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}
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declare void @sha_stream_bb3_2E_i_bb1_2E_i_2E_i(i8*) nounwind
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