1 ; RUN: llc -verify-machineinstrs -mtriple=i386-linux-gnu %s -o - | FileCheck %s
2 ; RUN: llc -verify-machineinstrs -mtriple=i386-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s
3 ; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu %s -o - | FileCheck %s
4 ; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s
8 define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) {
9 ; CHECK-LABEL: test_intervening_call:
11 ; CHECK: pushf[[LQ:[lq]]]
12 ; CHECK-NEXT: pop[[LQ]] [[FLAGS:%.*]]
14 ; CHECK-NEXT: call[[LQ]] bar
16 ; CHECK-NEXT: push[[LQ]] [[FLAGS]]
17 ; CHECK-NEXT: popf[[LQ]]
19 %cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst
20 %p = extractvalue { i64, i1 } %cx, 1
22 br i1 %p, label %t, label %f
31 ; Interesting in producing a clobber without any function calls.
32 define i32 @test_control_flow(i32* %p, i32 %i, i32 %j) {
33 ; CHECK-LABEL: test_control_flow:
38 %cmp = icmp sgt i32 %i, %j
39 br i1 %cmp, label %loop_start, label %cond.end
42 br label %while.condthread-pre-split.i
44 while.condthread-pre-split.i:
45 %.pr.i = load i32, i32* %p, align 4
46 br label %while.cond.i
49 %0 = phi i32 [ %.pr.i, %while.condthread-pre-split.i ], [ 0, %while.cond.i ]
50 %tobool.i = icmp eq i32 %0, 0
51 br i1 %tobool.i, label %while.cond.i, label %while.body.i
54 %.lcssa = phi i32 [ %0, %while.cond.i ]
55 %1 = cmpxchg i32* %p, i32 %.lcssa, i32 %.lcssa seq_cst seq_cst
56 %2 = extractvalue { i32, i1 } %1, 1
57 br i1 %2, label %cond.end.loopexit, label %while.condthread-pre-split.i
63 %cond = phi i32 [ %i, %entry ], [ 0, %cond.end.loopexit ]
67 ; This one is an interesting case because CMOV doesn't have a chain
68 ; operand. Naive attempts to limit cmpxchg EFLAGS use are likely to fail here.
69 define i32 @test_feed_cmov(i32* %addr, i32 %desired, i32 %new) {
70 ; CHECK-LABEL: test_feed_cmov:
73 ; CHECK: pushf[[LQ:[lq]]]
74 ; CHECK-NEXT: pop[[LQ]] [[FLAGS:%.*]]
76 ; CHECK-NEXT: call[[LQ]] bar
78 ; CHECK-NEXT: push[[LQ]] [[FLAGS]]
79 ; CHECK-NEXT: popf[[LQ]]
80 %res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst seq_cst
81 %success = extractvalue { i32, i1 } %res, 1
83 %rhs = call i32 @bar()
85 %ret = select i1 %success, i32 %new, i32 %rhs