b049173157
This is no-functional-change-intended. This is repackaging the functionality of D30333 (defer switch-to-lookup-tables) and D35411 (defer folding unconditional branches) with pass parameters rather than a named "latesimplifycfg" pass. Now that we have individual options to control the functionality, we could decouple when these fire (but that's an independent patch if desired). The next planned step would be to add another option bit to disable the sinking transform mentioned in D38566. This should also make it clear that the new pass manager needs to be updated to limit simplifycfg in the same way as the old pass manager. Differential Revision: https://reviews.llvm.org/D38631 llvm-svn: 316835
42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; RUN: opt -S -simplifycfg -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
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; rdar://17735071
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target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-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-darwin12.0.0"
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; When tableindex can't fit into i2, we should extend the type to i3.
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; CHECK-LABEL: @_TFO6reduce1E5toRawfS0_FT_Si
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; CHECK: entry:
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; CHECK-NEXT: sub i2 %0, -2
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; CHECK-NEXT: zext i2 %switch.tableidx to i3
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; CHECK-NEXT: getelementptr inbounds [4 x i64], [4 x i64]* @switch.table._TFO6reduce1E5toRawfS0_FT_Si, i32 0, i3 %switch.tableidx.zext
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; CHECK-NEXT: load i64, i64* %switch.gep
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; CHECK-NEXT: ret i64 %switch.load
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define i64 @_TFO6reduce1E5toRawfS0_FT_Si(i2) {
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entry:
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switch i2 %0, label %1 [
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i2 0, label %2
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i2 1, label %3
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i2 -2, label %4
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i2 -1, label %5
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]
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; <label>:1 ; preds = %entry
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unreachable
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; <label>:2 ; preds = %2
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br label %6
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; <label>:3 ; preds = %4
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br label %6
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; <label>:4 ; preds = %6
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br label %6
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; <label>:5 ; preds = %8
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br label %6
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; <label>:6 ; preds = %3, %5, %7, %9
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%7 = phi i64 [ 3, %5 ], [ 2, %4 ], [ 1, %3 ], [ 0, %2 ]
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ret i64 %7
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}
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