unreachable.ll
3.04 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basicaa -slp-vectorizer -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 | FileCheck %s
; Check if the SLPVectorizer does not crash when handling
; unreachable blocks with unscheduleable instructions.
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.9.0"
define void @foo(i32* nocapture %x) #0 {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds i32, i32* [[X:%.*]], i64 4
; CHECK-NEXT: [[T4:%.*]] = load i32, i32* [[T3]], align 4
; CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 5
; CHECK-NEXT: [[T6:%.*]] = load i32, i32* [[T5]], align 4
; CHECK-NEXT: [[BAD:%.*]] = fadd float [[BAD]], 0.000000e+00
; CHECK-NEXT: [[T7:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 6
; CHECK-NEXT: [[T8:%.*]] = load i32, i32* [[T7]], align 4
; CHECK-NEXT: [[T9:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 7
; CHECK-NEXT: [[T10:%.*]] = load i32, i32* [[T9]], align 4
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: [[T1_0:%.*]] = phi i32 [ [[T4]], [[BB1:%.*]] ], [ 2, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[T2_0:%.*]] = phi i32 [ [[T6]], [[BB1]] ], [ 2, [[ENTRY]] ]
; CHECK-NEXT: [[T3_0:%.*]] = phi i32 [ [[T8]], [[BB1]] ], [ 2, [[ENTRY]] ]
; CHECK-NEXT: [[T4_0:%.*]] = phi i32 [ [[T10]], [[BB1]] ], [ 2, [[ENTRY]] ]
; CHECK-NEXT: store i32 [[T1_0]], i32* [[X]], align 4
; CHECK-NEXT: [[T12:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 1
; CHECK-NEXT: store i32 [[T2_0]], i32* [[T12]], align 4
; CHECK-NEXT: [[T13:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 2
; CHECK-NEXT: store i32 [[T3_0]], i32* [[T13]], align 4
; CHECK-NEXT: [[T14:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 3
; CHECK-NEXT: store i32 [[T4_0]], i32* [[T14]], align 4
; CHECK-NEXT: ret void
;
entry:
br label %bb2
bb1: ; an unreachable block
%t3 = getelementptr inbounds i32, i32* %x, i64 4
%t4 = load i32, i32* %t3, align 4
%t5 = getelementptr inbounds i32, i32* %x, i64 5
%t6 = load i32, i32* %t5, align 4
%bad = fadd float %bad, 0.000000e+00 ; <- an instruction with self dependency,
; but legal in unreachable code
%t7 = getelementptr inbounds i32, i32* %x, i64 6
%t8 = load i32, i32* %t7, align 4
%t9 = getelementptr inbounds i32, i32* %x, i64 7
%t10 = load i32, i32* %t9, align 4
br label %bb2
bb2:
%t1.0 = phi i32 [ %t4, %bb1 ], [ 2, %entry ]
%t2.0 = phi i32 [ %t6, %bb1 ], [ 2, %entry ]
%t3.0 = phi i32 [ %t8, %bb1 ], [ 2, %entry ]
%t4.0 = phi i32 [ %t10, %bb1 ], [ 2, %entry ]
store i32 %t1.0, i32* %x, align 4
%t12 = getelementptr inbounds i32, i32* %x, i64 1
store i32 %t2.0, i32* %t12, align 4
%t13 = getelementptr inbounds i32, i32* %x, i64 2
store i32 %t3.0, i32* %t13, align 4
%t14 = getelementptr inbounds i32, i32* %x, i64 3
store i32 %t4.0, i32* %t14, align 4
ret void
}