1 files changed, 359 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/swifterror.ll b/llvm/test/CodeGen/X86/swifterror.ll
new file mode 100644
index 00000000000..d8db36b09c2
--- /dev/null
+++ b/llvm/test/CodeGen/X86/swifterror.ll
@@ -0,0 +1,359 @@
+; RUN: llc -verify-machineinstrs < %s -mtriple=x86_64-apple-darwin | FileCheck --check-prefix=CHECK-APPLE %s
+; RUN: llc -verify-machineinstrs -O0 < %s -mtriple=x86_64-apple-darwin | FileCheck --check-prefix=CHECK-O0 %s
+
+declare i8* @malloc(i64)
+declare void @free(i8*)
+%swift_error = type {i64, i8}
+
+; This tests the basic usage of a swifterror parameter. "foo" is the function
+; that takes a swifterror parameter and "caller" is the caller of "foo".
+define float @foo(%swift_error** swifterror %error_ptr_ref) {
+; CHECK-APPLE-LABEL: foo:
+; CHECK-APPLE: movl $16, %edi
+; CHECK-APPLE: malloc
+; CHECK-APPLE: movb $1, 8(%rax)
+; CHECK-APPLE: movq %rax, %r12
+
+; CHECK-O0-LABEL: foo:
+; CHECK-O0: movl $16
+; CHECK-O0: malloc
+; CHECK-O0: movb $1, 8(%rax)
+; CHECK-O0: movq %{{.*}}, %r12
+entry:
+  %call = call i8* @malloc(i64 16)
+  %call.0 = bitcast i8* %call to %swift_error*
+  store %swift_error* %call.0, %swift_error** %error_ptr_ref
+  %tmp = getelementptr inbounds i8, i8* %call, i64 8
+  store i8 1, i8* %tmp
+  ret float 1.0
+}
+
+; "caller" calls "foo" that takes a swifterror parameter.
+define float @caller(i8* %error_ref) {
+; CHECK-APPLE-LABEL: caller:
+; CHECK-APPLE: xorl %r12d, %r12d
+; CHECK-APPLE: callq {{.*}}foo
+; CHECK-APPLE: testq %r12, %r12
+; CHECK-APPLE: jne
+; Access part of the error object and save it to error_ref
+; CHECK-APPLE: movb 8(%r12)
+; CHECK-APPLE: movq %r12, %rdi
+; CHECK_APPLE: callq {{.*}}free
+
+; CHECK-O0-LABEL: caller:
+; CHECK-O0: xorl
+; CHECK-O0: movl %{{.*}}, %r12d
+; CHECK-O0: callq {{.*}}foo
+; CHECK-O0: jne
+entry:
+  %error_ptr_ref = alloca swifterror %swift_error*
+  store %swift_error* null, %swift_error** %error_ptr_ref
+  %call = call float @foo(%swift_error** swifterror %error_ptr_ref)
+  %error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
+  %had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
+  %tmp = bitcast %swift_error* %error_from_foo to i8*
+  br i1 %had_error_from_foo, label %handler, label %cont
+cont:
+  %v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
+  %t = load i8, i8* %v1
+  store i8 %t, i8* %error_ref
+  br label %handler
+handler:
+  call void @free(i8* %tmp)
+  ret float 1.0
+}
+
+; "caller2" is the caller of "foo", it calls "foo" inside a loop.
+define float @caller2(i8* %error_ref) {
+; CHECK-APPLE-LABEL: caller2:
+; CHECK-APPLE: xorl %r12d, %r12d
+; CHECK-APPLE: callq {{.*}}foo
+; CHECK-APPLE: testq %r12, %r12
+; CHECK-APPLE: jne
+; CHECK-APPLE: ucomiss
+; CHECK-APPLE: jbe
+; Access part of the error object and save it to error_ref
+; CHECK-APPLE: movb 8(%r12)
+; CHECK-APPLE: movq %r12, %rdi
+; CHECK_APPLE: callq {{.*}}free
+
+; CHECK-O0-LABEL: caller2:
+; CHECK-O0: xorl
+; CHECK-O0: movl %{{.*}}, %r12d
+; CHECK-O0: callq {{.*}}foo
+; CHECK-O0: movq %r12, [[ID:%[a-z]+]]
+; CHECK-O0: cmpq $0, [[ID]]
+; CHECK-O0: jne
+entry:
+  %error_ptr_ref = alloca swifterror %swift_error*
+  br label %bb_loop
+bb_loop:
+  store %swift_error* null, %swift_error** %error_ptr_ref
+  %call = call float @foo(%swift_error** swifterror %error_ptr_ref)
+  %error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
+  %had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
+  %tmp = bitcast %swift_error* %error_from_foo to i8*
+  br i1 %had_error_from_foo, label %handler, label %cont
+cont:
+  %cmp = fcmp ogt float %call, 1.000000e+00
+  br i1 %cmp, label %bb_end, label %bb_loop
+bb_end:
+  %v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
+  %t = load i8, i8* %v1
+  store i8 %t, i8* %error_ref
+  br label %handler
+handler:
+  call void @free(i8* %tmp)
+  ret float 1.0
+}
+
+; "foo_if" is a function that takes a swifterror parameter, it sets swifterror
+; under a certain condition.
+define float @foo_if(%swift_error** swifterror %error_ptr_ref, i32 %cc) {
+; CHECK-APPLE-LABEL: foo_if:
+; CHECK-APPLE: testl %edi, %edi
+; CHECK-APPLE: je
+; CHECK-APPLE: movl $16, %edi
+; CHECK-APPLE: malloc
+; CHECK-APPLE: movb $1, 8(%rax)
+; CHECK-APPLE: movq %rax, %r12
+; CHECK-APPLE-NOT: %r12
+; CHECK-APPLE: ret
+
+; CHECK-O0-LABEL: foo_if:
+; CHECK-O0: cmpl $0
+; spill to stack
+; CHECK-O0: movq %r12, {{.*}}(%rsp)
+; CHECK-O0: je
+; CHECK-O0: movl $16,
+; CHECK-O0: malloc
+; CHECK-O0: movq %rax, [[ID:%[a-z]+]]
+; CHECK-O0-DAG: movb $1, 8(%rax)
+; CHECK-O0-DAG: movq [[ID]], %r12
+; CHECK-O0: ret
+; reload from stack
+; CHECK-O0: movq {{.*}}(%rsp), %r12
+; CHECK-O0: ret
+entry:
+  %cond = icmp ne i32 %cc, 0
+  br i1 %cond, label %gen_error, label %normal
+
+gen_error:
+  %call = call i8* @malloc(i64 16)
+  %call.0 = bitcast i8* %call to %swift_error*
+  store %swift_error* %call.0, %swift_error** %error_ptr_ref
+  %tmp = getelementptr inbounds i8, i8* %call, i64 8
+  store i8 1, i8* %tmp
+  ret float 1.0
+
+normal:
+  ret float 0.0
+}
+
+; "foo_loop" is a function that takes a swifterror parameter, it sets swifterror
+; under a certain condition inside a loop.
+define float @foo_loop(%swift_error** swifterror %error_ptr_ref, i32 %cc, float %cc2) {
+; CHECK-APPLE-LABEL: foo_loop:
+; CHECK-APPLE: movq %r12, %rax
+; CHECK-APPLE: testl
+; CHECK-APPLE: je
+; CHECK-APPLE: movl $16, %edi
+; CHECK-APPLE: malloc
+; CHECK-APPLE: movb $1, 8(%rax)
+; CHECK-APPLE: ucomiss
+; CHECK-APPLE: jbe
+; CHECK-APPLE: movq %rax, %r12
+; CHECK-APPLE: ret
+
+; CHECK-O0-LABEL: foo_loop:
+; spill to stack
+; CHECK-O0: movq %r12, {{.*}}(%rsp)
+; CHECK-O0: cmpl $0
+; CHECK-O0: je
+; CHECK-O0: movl $16,
+; CHECK-O0: malloc
+; CHECK-O0: movq %rax, [[ID:%[a-z]+]]
+; CHECK-O0: movb $1, 8([[ID]])
+; CHECK-O0: jbe
+; reload from stack
+; CHECK-O0: movq {{.*}}(%rsp), %r12
+; CHECK-O0: ret
+entry:
+  br label %bb_loop
+
+bb_loop:
+  %cond = icmp ne i32 %cc, 0
+  br i1 %cond, label %gen_error, label %bb_cont
+
+gen_error:
+  %call = call i8* @malloc(i64 16)
+  %call.0 = bitcast i8* %call to %swift_error*
+  store %swift_error* %call.0, %swift_error** %error_ptr_ref
+  %tmp = getelementptr inbounds i8, i8* %call, i64 8
+  store i8 1, i8* %tmp
+  br label %bb_cont
+
+bb_cont:
+  %cmp = fcmp ogt float %cc2, 1.000000e+00
+  br i1 %cmp, label %bb_end, label %bb_loop
+bb_end:
+  ret float 0.0
+}
+
+%struct.S = type { i32, i32, i32, i32, i32, i32 }
+
+; "foo_sret" is a function that takes a swifterror parameter, it also has a sret
+; parameter.
+define void @foo_sret(%struct.S* sret %agg.result, i32 %val1, %swift_error** swifterror %error_ptr_ref) {
+; CHECK-APPLE-LABEL: foo_sret:
+; CHECK-APPLE: movq %rdi, %{{.*}}
+; CHECK-APPLE: movl $16, %edi
+; CHECK-APPLE: malloc
+; CHECK-APPLE: movb $1, 8(%rax)
+; CHECK-APPLE: movl %{{.*}}, 4(%{{.*}})
+; CHECK-APPLE: movq %rax, %r12
+; CHECK-APPLE: movq %{{.*}}, %rax
+; CHECK-APPLE-NOT: x19
+
+; CHECK-O0-LABEL: foo_sret:
+; CHECK-O0: movl $16,
+; spill sret to stack
+; CHECK-O0: movq %rdi,
+; CHECK-O0: movq {{.*}}, %rdi
+; CHECK-O0: malloc
+; CHECK-O0: movb $1, 8(%rax)
+; CHECK-O0: movl %{{.*}}, 4(%{{.*}})
+; CHECK-O0: movq %{{.*}}, %r12
+; reload sret from stack
+; CHECK-O0: movq {{.*}}(%rsp), %rax
+; CHECK-O0: ret
+entry:
+  %call = call i8* @malloc(i64 16)
+  %call.0 = bitcast i8* %call to %swift_error*
+  store %swift_error* %call.0, %swift_error** %error_ptr_ref
+  %tmp = getelementptr inbounds i8, i8* %call, i64 8
+  store i8 1, i8* %tmp
+  %v2 = getelementptr inbounds %struct.S, %struct.S* %agg.result, i32 0, i32 1
+  store i32 %val1, i32* %v2
+  ret void
+}
+
+; "caller3" calls "foo_sret" that takes a swifterror parameter.
+define float @caller3(i8* %error_ref) {
+; CHECK-APPLE-LABEL: caller3:
+; CHECK-APPLE: movl $1, %esi
+; CHECK-APPLE: xorl %r12d, %r12d
+; CHECK-APPLE: callq {{.*}}foo_sret
+; CHECK-APPLE: testq %r12, %r12
+; CHECK-APPLE: jne
+; Access part of the error object and save it to error_ref
+; CHECK-APPLE: movb 8(%r12),
+; CHECK-APPLE: movb %{{.*}},
+; CHECK-APPLE: movq %r12, %rdi
+; CHECK_APPLE: callq {{.*}}free
+
+; CHECK-O0-LABEL: caller3:
+; CHECK-O0: xorl
+; CHECK-O0: movl {{.*}}, %r12d
+; CHECK-O0: movl $1, %esi
+; CHECK-O0: movq {{.*}}, %rdi
+; CHECK-O0: callq {{.*}}foo_sret
+; CHECK-O0: movq %r12,
+; CHECK-O0: cmpq $0
+; CHECK-O0: jne
+; Access part of the error object and save it to error_ref
+; CHECK-O0: movb 8(%{{.*}}),
+; CHECK-O0: movb %{{.*}},
+; reload from stack
+; CHECK-O0: movq {{.*}}(%rsp), %rdi
+; CHECK-O0: callq {{.*}}free
+entry:
+  %s = alloca %struct.S, align 8
+  %error_ptr_ref = alloca swifterror %swift_error*
+  store %swift_error* null, %swift_error** %error_ptr_ref
+  call void @foo_sret(%struct.S* sret %s, i32 1, %swift_error** swifterror %error_ptr_ref)
+  %error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
+  %had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
+  %tmp = bitcast %swift_error* %error_from_foo to i8*
+  br i1 %had_error_from_foo, label %handler, label %cont
+cont:
+  %v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
+  %t = load i8, i8* %v1
+  store i8 %t, i8* %error_ref
+  br label %handler
+handler:
+  call void @free(i8* %tmp)
+  ret float 1.0
+}
+
+; This is a caller with multiple swifterror values, it calls "foo" twice, each
+; time with a different swifterror value, from "alloca swifterror".
+define float @caller_with_multiple_swifterror_values(i8* %error_ref, i8* %error_ref2) {
+; CHECK-APPLE-LABEL: caller_with_multiple_swifterror_values:
+
+; The first swifterror value:
+; CHECK-APPLE: xorl %r12d, %r12d
+; CHECK-APPLE: callq {{.*}}foo
+; CHECK-APPLE: testq %r12, %r12
+; CHECK-APPLE: jne
+; Access part of the error object and save it to error_ref
+; CHECK-APPLE: movb 8(%r12)
+; CHECK-APPLE: movq %r12, %rdi
+; CHECK_APPLE: callq {{.*}}free
+
+; The second swifterror value:
+; CHECK-APPLE: xorl %r12d, %r12d
+; CHECK-APPLE: callq {{.*}}foo
+; CHECK-APPLE: testq %r12, %r12
+; CHECK-APPLE: jne
+; Access part of the error object and save it to error_ref
+; CHECK-APPLE: movb 8(%r12)
+; CHECK-APPLE: movq %r12, %rdi
+; CHECK_APPLE: callq {{.*}}free
+
+; CHECK-O0-LABEL: caller_with_multiple_swifterror_values:
+
+; The first swifterror value:
+; CHECK-O0: xorl
+; CHECK-O0: movl %{{.*}}, %r12d
+; CHECK-O0: callq {{.*}}foo
+; CHECK-O0: jne
+
+; The second swifterror value:
+; CHECK-O0: xorl
+; CHECK-O0: movl %{{.*}}, %r12d
+; CHECK-O0: callq {{.*}}foo
+; CHECK-O0: jne
+entry:
+  %error_ptr_ref = alloca swifterror %swift_error*
+  store %swift_error* null, %swift_error** %error_ptr_ref
+  %call = call float @foo(%swift_error** swifterror %error_ptr_ref)
+  %error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
+  %had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
+  %tmp = bitcast %swift_error* %error_from_foo to i8*
+  br i1 %had_error_from_foo, label %handler, label %cont
+cont:
+  %v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
+  %t = load i8, i8* %v1
+  store i8 %t, i8* %error_ref
+  br label %handler
+handler:
+  call void @free(i8* %tmp)
+
+  %error_ptr_ref2 = alloca swifterror %swift_error*
+  store %swift_error* null, %swift_error** %error_ptr_ref2
+  %call2 = call float @foo(%swift_error** swifterror %error_ptr_ref2)
+  %error_from_foo2 = load %swift_error*, %swift_error** %error_ptr_ref2
+  %had_error_from_foo2 = icmp ne %swift_error* %error_from_foo2, null
+  %bitcast2 = bitcast %swift_error* %error_from_foo2 to i8*
+  br i1 %had_error_from_foo2, label %handler2, label %cont2
+cont2:
+  %v2 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo2, i64 0, i32 1
+  %t2 = load i8, i8* %v2
+  store i8 %t2, i8* %error_ref2
+  br label %handler2
+handler2:
+  call void @free(i8* %bitcast2)
+
+  ret float 1.0
+}