CodeGen peephole: fold redundant phys reg copies

[oota-llvm.git] / test / CodeGen / X86 / cmpxchg-clobber-flags.ll

diff --git a/test/CodeGen/X86/cmpxchg-clobber-flags.ll b/test/CodeGen/X86/cmpxchg-clobber-flags.ll
index 3cb8b97de45ff2ef1789484dc74b0f0cb1b8db71..c129128b5fa78996c295c2c913fe0e29cd54d67d 100644 (file)
--- a/test/CodeGen/X86/cmpxchg-clobber-flags.ll
+++ b/test/CodeGen/X86/cmpxchg-clobber-flags.ll
@@ -1,22 +1,58 @@
-; 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 -verify-machineinstrs -mtriple=i386-linux-gnu %s -o - | FileCheck %s -check-prefix=i386
+; RUN: llc -verify-machineinstrs -mtriple=i386-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=i386f
+; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu %s -o - | FileCheck %s -check-prefix=x8664
+; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=x8664
 
-declare i32 @bar()
+declare i32 @foo()
+declare i32 @bar(i64)
 
 define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) {
-; CHECK-LABEL: test_intervening_call:
-; CHECK: cmpxchg
-; CHECK: pushfq
-; CHECK: popq [[FLAGS:%.*]]
+; i386-LABEL: test_intervening_call:
+; i386: cmpxchg8b
+; i386-NEXT: pushl %eax
+; i386-NEXT: seto %al
+; i386-NEXT: lahf
+; i386-NEXT: movl %eax, [[FLAGS:%.*]]
+; i386-NEXT: popl %eax
+; i386-NEXT: movl %edx, 4(%esp)
+; i386-NEXT: movl %eax, (%esp)
+; i386-NEXT: calll bar
+; i386-NEXT: movl [[FLAGS]], %eax
+; i386-NEXT: addb $127, %al
+; i386-NEXT: sahf
+; i386-NEXT: jne
+
+; i386f-LABEL: test_intervening_call:
+; i386f: cmpxchg8b
+; i386f-NEXT: movl %eax, (%esp)
+; i386f-NEXT: movl %edx, 4(%esp)
+; i386f-NEXT: seto %al
+; i386f-NEXT: lahf
+; i386f-NEXT: movl %eax, [[FLAGS:%.*]]
+; i386f-NEXT: calll bar
+; i386f-NEXT: movl [[FLAGS]], %eax
+; i386f-NEXT: addb $127, %al
+; i386f-NEXT: sahf
+; i386f-NEXT: jne
+
+; x8664-LABEL: test_intervening_call:
+; x8664: cmpxchgq
+; x8664: pushq %rax
+; x8664-NEXT: seto %al
+; x8664-NEXT: lahf
+; x8664-NEXT: movq %rax, [[FLAGS:%.*]]
+; x8664-NEXT: popq %rax
+; x8664-NEXT: movq %rax, %rdi
+; x8664-NEXT: callq bar
+; x8664-NEXT: movq [[FLAGS]], %rax
+; x8664-NEXT: addb $127, %al
+; x8664-NEXT: sahf
+; x8664-NEXT: jne
 
-; CHECK: callq bar
-
-; CHECK: pushq [[FLAGS]]
-; CHECK: popfq
-; CHECK: jne
   %cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst
+  %v = extractvalue { i64, i1 } %cx, 0
   %p = extractvalue { i64, i1 } %cx, 1
-  call i32 @bar()
+  call i32 @bar(i64 %v)
   br i1 %p, label %t, label %f
 
 t:
@@ -28,10 +64,18 @@ f:
 
 ; 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:
+; i386-LABEL: test_control_flow:
+; i386: cmpxchg
+; i386-NEXT: jne
+
+; i386f-LABEL: test_control_flow:
+; i386f: cmpxchg
+; i386f-NEXT: jne
+
+; x8664-LABEL: test_control_flow:
+; x8664: cmpxchg
+; x8664-NEXT: jne
 
-; CHECK: cmpxchg
-; CHECK-NEXT: jne
 entry:
   %cmp = icmp sgt i32 %i, %j
   br i1 %cmp, label %loop_start, label %cond.end
@@ -40,7 +84,7 @@ loop_start:
   br label %while.condthread-pre-split.i
 
 while.condthread-pre-split.i:
-  %.pr.i = load i32* %p, align 4
+  %.pr.i = load i32, i32* %p, align 4
   br label %while.cond.i
 
 while.cond.i:
@@ -65,21 +109,46 @@ cond.end:
 ; 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: pushfq
-; CHECK: popq [[FLAGS:%.*]]
-
-; CHECK: callq bar
-
-; CHECK: pushq [[FLAGS]]
-; CHECK: popfq
+; i386-LABEL: test_feed_cmov:
+; i386: cmpxchgl
+; i386-NEXT: seto %al
+; i386-NEXT: lahf
+; i386-NEXT: movl %eax, [[FLAGS:%.*]]
+; i386-NEXT: calll foo
+; i386-NEXT: pushl %eax
+; i386-NEXT: movl [[FLAGS]], %eax
+; i386-NEXT: addb $127, %al
+; i386-NEXT: sahf
+; i386-NEXT: popl %eax
+
+; i386f-LABEL: test_feed_cmov:
+; i386f: cmpxchgl
+; i386f-NEXT: seto %al
+; i386f-NEXT: lahf
+; i386f-NEXT: movl %eax, [[FLAGS:%.*]]
+; i386f-NEXT: calll foo
+; i386f-NEXT: pushl %eax
+; i386f-NEXT: movl [[FLAGS]], %eax
+; i386f-NEXT: addb $127, %al
+; i386f-NEXT: sahf
+; i386f-NEXT: popl %eax
+
+; x8664-LABEL: test_feed_cmov:
+; x8664: cmpxchgl
+; x8664: seto %al
+; x8664-NEXT: lahf
+; x8664-NEXT: movq %rax, [[FLAGS:%.*]]
+; x8664-NEXT: callq foo
+; x8664-NEXT: pushq %rax
+; x8664-NEXT: movq [[FLAGS]], %rax
+; x8664-NEXT: addb $127, %al
+; x8664-NEXT: sahf
+; x8664-NEXT: popq %rax
 
   %res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst seq_cst
   %success = extractvalue { i32, i1 } %res, 1
 
-  %rhs = call i32 @bar()
+  %rhs = call i32 @foo()
 
   %ret = select i1 %success, i32 %new, i32 %rhs
   ret i32 %ret