blob: a1029762ad4a4b88688d3550ad92a1f30b698854 [file] [log] [blame]
; RUN: opt -passes=gvn -S < %s | FileCheck %s
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-f128:128:128-n8:16:32:64"
; GVN shouldn't PRE the load around the loop backedge because it's
; not actually redundant around the loop backedge, despite appearances
; if phi-translation is ignored.
; CHECK: define void @test0(ptr %begin)
; CHECK: loop:
; CHECK: %l0 = load i8, ptr %phi
; CHECK: call void @bar(i8 %l0)
; CHECK: %l1 = load i8, ptr %phi
define void @test0(ptr %begin) {
br label %loop
%phi = phi ptr [ %begin, %entry ], [ %next, %loop ]
%l0 = load i8, ptr %phi
call void @bar(i8 %l0)
%l1 = load i8, ptr %phi
%next = getelementptr inbounds i8, ptr %phi, i8 %l1
br label %loop
declare void @bar(i8)