File: 2015-09-18-Addrspace.ll

package info (click to toggle)
llvm-toolchain-5.0 1:5.0.1-2~bpo9+1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 553,688 kB
  • sloc: cpp: 2,878,786; ansic: 584,110; asm: 246,252; python: 124,751; objc: 106,925; sh: 21,542; lisp: 8,628; pascal: 5,885; ml: 5,544; perl: 5,312; makefile: 2,208; cs: 2,022; xml: 686; php: 212; csh: 117
file content (28 lines) | stat: -rw-r--r-- 1,169 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
; RUN: opt < %s -simple-loop-unswitch -S | FileCheck %s

; In cases where two address spaces do not have the same size pointer, the
; input for the addrspacecast should not be used as a substitute for itself
; when manipulating the pointer.

target datalayout = "e-m:e-p:16:16-p1:32:16-i32:16-i64:16-n8:16"

define void @foo() {
; CHECK-LABEL: @foo
entry:
  %arrayidx.i1 = getelementptr inbounds i16, i16* undef, i16 undef
  %arrayidx.i = addrspacecast i16* %arrayidx.i1 to i16 addrspace(1)*
  br i1 undef, label %for.body.i, label %bar.exit

for.body.i:                                       ; preds = %for.body.i, %entry
; When we call makeLoopInvariant (i.e. trivial LICM) on this load, it 
; will try to find the base object to prove deferenceability.  If we look
; through the addrspacecast, we'll fail an assertion about bitwidths matching
; CHECK-LABEL: for.body.i
; CHECK:   %0 = load i16, i16 addrspace(1)* %arrayidx.i, align 2
  %0 = load i16, i16 addrspace(1)* %arrayidx.i, align 2
  %cmp1.i = icmp eq i16 %0, 0
  br i1 %cmp1.i, label %bar.exit, label %for.body.i

bar.exit:                                         ; preds = %for.body.i, %entry
  ret void
}