| ; XFAIL: * |
| ; RUN: opt -passes=dse -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-n8:16:32:64" |
| target triple = "x86_64-apple-macosx10.7.0" |
| |
| ; Basic correctness tests for atomic stores. |
| ; Note that it turns out essentially every transformation DSE does is legal on |
| ; atomic ops, just some transformations are not allowed across release-acquire pairs. |
| |
| @x = common global i32 0, align 4 |
| @y = common global i32 0, align 4 |
| |
| ; DSE across monotonic load (allowed as long as the eliminated store isUnordered) |
| define i32 @test9() { |
| ; CHECK-LABEL: test9 |
| ; CHECK-NOT: store i32 0 |
| ; CHECK: store i32 1 |
| store i32 0, ptr @x |
| %x = load atomic i32, ptr @y monotonic, align 4 |
| store i32 1, ptr @x |
| ret i32 %x |
| } |
