Rebased PNaCl localmods in LLVM to 223109

test/CodeGen/X86/cmpxchg-clobber-flags.ll

-; RUN: llc -mtriple=x86_64-linux-gnu %s -o - | FileCheck %s
-; RUN: llc -mtriple=x86_64-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s
+; RUN: llc -mtriple=i386-unknown-linux %s -o - | FileCheck %s
+; RUN: llc -mtriple=i386-unknown-linux -pre-RA-sched=fast %s -o - | FileCheck %s
+; RUN: llc -mtriple=x86_64-unknown-linux %s -o - | FileCheck %s
+; RUN: llc -mtriple=x86_64-unknown-linux -pre-RA-sched=fast %s -o - | FileCheck %s
+; RUN: llc -mtriple=i386-unknown-nacl %s -o - | FileCheck %s -check-prefix=NACL
+; RUN: llc -mtriple=i386-unknown-nacl -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=NACL
+; RUN: llc -mtriple=x86_64-unknown-nacl %s -o - | FileCheck %s -check-prefix=NACL
+; RUN: llc -mtriple=x86_64-unknown-nacl -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=NACL
 
 declare i32 @bar()
 
 define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) {
 ; CHECK-LABEL: test_intervening_call:
 ; CHECK: cmpxchg
-; CHECK: pushfq
-; CHECK: popq [[FLAGS:%.*]]
+; CHECK: pushf[[LQ:[lq]]]
+; CHECK-NEXT: pop[[LQ]] [[FLAGS:%.*]]
 
-; CHECK: callq bar
+; CHECK-NEXT: call[[LQ]] bar
 
-; CHECK: pushq [[FLAGS]]
-; CHECK: popfq
-; CHECK: jne
+; CHECK-NEXT: push[[LQ]] [[FLAGS]]
+; CHECK-NEXT: popf[[LQ]]
+; CHECK-NEXT: jne
+
+
+; NACL-LABEL: test_intervening_call:
+; NACL: cmpxchg
+; NACL: push[[LQ:[lq]]] [[AX:%.*]]
+; NACL-NEXT: lahf
+; NACL-NEXT: mov[[LQ]] [[AX]], [[FLAGS:%.*]]
+; NACL-NEXT: pop[[LQ]] [[AX]]
+
+; NACL-NEXT: call[[LQ]] bar
+
+; NACL-NEXT: push[[LQ]] [[AX]]
+; NACL-NEXT: mov[[LQ]] [[FLAGS]], [[AX]]
+; NACL-NEXT: sahf
+; NACL-NEXT: pop[[LQ]] [[AX]]
+; NACL-NEXT: jne
+
   %cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst
   %p = extractvalue { i64, i1 } %cx, 1
   call i32 @bar()
   br i1 %p, label %t, label %f
 
 t:
   ret i64 42
 
 f:
   ret i64 0
 }
 
 ; Interesting in producing a clobber without any function calls.
 define i32 @test_control_flow(i32* %p, i32 %i, i32 %j) {
 ; CHECK-LABEL: test_control_flow:
-
 ; CHECK: cmpxchg
 ; CHECK-NEXT: jne
+
+; NACL-LABEL: test_control_flow:
+; NACL: cmpxchg
+; NACL-NEXT: jne
+
 entry:
   %cmp = icmp sgt i32 %i, %j
   br i1 %cmp, label %loop_start, label %cond.end
 
 loop_start:
   br label %while.condthread-pre-split.i
 
 while.condthread-pre-split.i:
   %.pr.i = load i32* %p, align 4
   br label %while.cond.i
@@ skipping 14 matching lines @@
 
 cond.end:
   %cond = phi i32 [ %i, %entry ], [ 0, %cond.end.loopexit ]
   ret i32 %cond
 }
 
 ; This one is an interesting case because CMOV doesn't have a chain
 ; operand. Naive attempts to limit cmpxchg EFLAGS use are likely to fail here.
 define i32 @test_feed_cmov(i32* %addr, i32 %desired, i32 %new) {
 ; CHECK-LABEL: test_feed_cmov:
+; CHECK: cmpxchg
+; CHECK: pushf[[LQ:[lq]]]
+; CHECK-NEXT: pop[[LQ]] [[FLAGS:%.*]]
 
-; CHECK: cmpxchg
-; CHECK: pushfq
-; CHECK: popq [[FLAGS:%.*]]
+; CHECK-NEXT: call[[LQ]] bar
 
-; CHECK: callq bar
+; CHECK-NEXT: push[[LQ]] [[FLAGS]]
+; CHECK-NEXT: popf[[LQ]]
 
-; CHECK: pushq [[FLAGS]]
-; CHECK: popfq
+
+; NACL-LABEL: test_feed_cmov:
+; NACL: cmpxchg
+; NACL: push[[LQ:[lq]]] [[AX:%.*]]
+; NACL-NEXT: lahf
+; NACL-NEXT: mov[[LQ]] [[AX]], [[FLAGS:%.*]]
+; NACL-NEXT: pop[[LQ]] [[AX]]
+
+; NACL-NEXT: call[[LQ]] bar
+
+; NACL-NEXT: push[[LQ]] [[AX]]
+; NACL-NEXT: mov[[LQ]] [[FLAGS]], [[AX]]
+; NACL-NEXT: sahf
+; NACL-NEXT: pop[[LQ]] [[AX]]
 
   %res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst seq_cst
   %success = extractvalue { i32, i1 } %res, 1
 
   %rhs = call i32 @bar()
 
   %ret = select i1 %success, i32 %new, i32 %rhs
   ret i32 %ret
 }