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https://github.com/c64scene-ar/llvm-6502.git
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06833ca7c1
The visitSwitchInst generates SUB constant expressions to recompute the switch condition. When truncating the condition to a smaller type, SUB expressions should use the previous type (before trunc) for both operands. Also, fix code to also return the modified switch when only the truncation is performed. This fixes an assertion crash. Differential Revision: http://reviews.llvm.org/D6644 rdar://problem/19191835 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224588 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
2.5 KiB
LLVM
124 lines
2.5 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
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; CHECK-LABEL: define i32 @positive1
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; CHECK: switch i32
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; CHECK: i32 10, label
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; CHECK: i32 100, label
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; CHECK: i32 1001, label
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define i32 @positive1(i64 %a) {
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entry:
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%and = and i64 %a, 4294967295
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switch i64 %and, label %sw.default [
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i64 10, label %return
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i64 100, label %sw.bb1
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i64 1001, label %sw.bb2
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]
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sw.bb1:
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br label %return
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sw.bb2:
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br label %return
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sw.default:
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br label %return
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return:
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%retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: define i32 @negative1
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; CHECK: switch i32
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; CHECK: i32 -10, label
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; CHECK: i32 -100, label
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; CHECK: i32 -1001, label
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define i32 @negative1(i64 %a) {
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entry:
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%or = or i64 %a, -4294967296
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switch i64 %or, label %sw.default [
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i64 -10, label %return
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i64 -100, label %sw.bb1
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i64 -1001, label %sw.bb2
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]
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sw.bb1:
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br label %return
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sw.bb2:
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br label %return
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sw.default:
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br label %return
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return:
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%retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ]
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ret i32 %retval.0
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}
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; Make sure truncating a constant int larger than 64-bit doesn't trigger an
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; assertion.
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; CHECK-LABEL: define i32 @trunc72to68
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; CHECK: switch i68
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; CHECK: i68 10, label
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; CHECK: i68 100, label
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; CHECK: i68 1001, label
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define i32 @trunc72to68(i72 %a) {
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entry:
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%and = and i72 %a, 295147905179352825855
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switch i72 %and, label %sw.default [
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i72 10, label %return
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i72 100, label %sw.bb1
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i72 1001, label %sw.bb2
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]
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sw.bb1:
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br label %return
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sw.bb2:
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br label %return
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sw.default:
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br label %return
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return:
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%retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ]
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ret i32 %retval.0
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}
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; Make sure to avoid assertion crashes and use the type before
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; truncation to generate the sub constant expressions that leads
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; to the recomputed condition.
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;
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; CHECK-LABEL: @trunc64to59
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; CHECK: switch i59
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; CHECK: i59 0, label
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; CHECK: i59 18717182647723699, label
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define void @trunc64to59(i64 %a) {
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entry:
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%tmp0 = and i64 %a, 15
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%tmp1 = mul i64 %tmp0, -6425668444178048401
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%tmp2 = add i64 %tmp1, 5170979678563097242
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%tmp3 = mul i64 %tmp2, 1627972535142754813
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switch i64 %tmp3, label %sw.default [
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i64 847514119312061490, label %sw.bb1
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i64 866231301959785189, label %sw.bb2
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]
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sw.bb1:
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br label %sw.default
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sw.bb2:
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br label %sw.default
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sw.default:
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ret void
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}
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