1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
2 ; RUN: opt -passes=newgvn -S < %s | FileCheck %s
4 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"
6 ; GVN shouldn't PRE the load around the loop backedge because it's
7 ; not actually redundant around the loop backedge, despite appearances
8 ; if phi-translation is ignored.
10 define void @test0(ptr %begin) {
11 ; CHECK-LABEL: define void @test0(
12 ; CHECK-SAME: ptr [[BEGIN:%.*]]) {
14 ; CHECK-NEXT: br label [[LOOP:%.*]]
16 ; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ [[BEGIN]], [[ENTRY:%.*]] ], [ [[NEXT:%.*]], [[LOOP]] ]
17 ; CHECK-NEXT: [[L0:%.*]] = load i8, ptr [[PHI]], align 1
18 ; CHECK-NEXT: call void @bar(i8 [[L0]])
19 ; CHECK-NEXT: [[L1:%.*]] = load i8, ptr [[PHI]], align 1
20 ; CHECK-NEXT: [[NEXT]] = getelementptr inbounds i8, ptr [[PHI]], i8 [[L1]]
21 ; CHECK-NEXT: br label [[LOOP]]
27 %phi = phi ptr [ %begin, %entry ], [ %next, %loop ]
28 %l0 = load i8, ptr %phi
29 call void @bar(i8 %l0)
30 %l1 = load i8, ptr %phi
31 %next = getelementptr inbounds i8, ptr %phi, i8 %l1