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llvm-mirror/test/Transforms/Inline/inline_unreachable.ll
Chandler Carruth 3a1d9fe91a [PM] Turn on the new PM's inliner in addition to the current one for
most of the inliner test cases.

The inliner involves a bunch of interesting code and tends to be where
most of the issues I've seen experimenting with the new PM lie. All of
these test cases pass, but I'd like to keep some more thorough coverage
here so doing a fairly blanket enabling.

There are a handful of interesting tests I've not enabled yet because
they're focused on the always inliner, or on functionality that doesn't
(yet) exist in the inliner.

llvm-svn: 290592
2016-12-27 07:18:43 +00:00

132 lines
3.6 KiB
LLVM

; RUN: opt < %s -inline -S | FileCheck %s
; RUN: opt < %s -passes='cgscc(inline)' -S | FileCheck %s
@a = global i32 4
@_ZTIi = external global i8*
; CHECK-LABEL: callSimpleFunction
; CHECK: call i32 @simpleFunction
define i32 @callSimpleFunction(i32 %idx, i32 %limit) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then:
%s = call i32 @simpleFunction(i32 %idx)
store i32 %s, i32* @a
unreachable
if.end:
ret i32 %idx
}
; CHECK-LABEL: callSmallFunction
; CHECK-NOT: call i32 @smallFunction
define i32 @callSmallFunction(i32 %idx, i32 %limit) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then:
%s = call i32 @smallFunction(i32 %idx)
store i32 %s, i32* @a
unreachable
if.end:
ret i32 %idx
}
; CHECK-LABEL: throwSimpleException
; CHECK: invoke i32 @simpleFunction
define i32 @throwSimpleException(i32 %idx, i32 %limit) #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%exception = call i8* @__cxa_allocate_exception(i64 1) #0
invoke i32 @simpleFunction(i32 %idx)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %if.then
call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #1
unreachable
lpad: ; preds = %if.then
%ll = landingpad { i8*, i32 }
cleanup
ret i32 %idx
if.end: ; preds = %entry
ret i32 %idx
}
; CHECK-LABEL: throwSmallException
; CHECK-NOT: invoke i32 @smallFunction
define i32 @throwSmallException(i32 %idx, i32 %limit) #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%exception = call i8* @__cxa_allocate_exception(i64 1) #0
invoke i32 @smallFunction(i32 %idx)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %if.then
call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #1
unreachable
lpad: ; preds = %if.then
%ll = landingpad { i8*, i32 }
cleanup
ret i32 %idx
if.end: ; preds = %entry
ret i32 %idx
}
define i32 @simpleFunction(i32 %a) #0 {
entry:
%a1 = load volatile i32, i32* @a
%x1 = add i32 %a1, %a1
%a2 = load volatile i32, i32* @a
%x2 = add i32 %x1, %a2
%a3 = load volatile i32, i32* @a
%x3 = add i32 %x2, %a3
%a4 = load volatile i32, i32* @a
%x4 = add i32 %x3, %a4
%a5 = load volatile i32, i32* @a
%x5 = add i32 %x4, %a5
%a6 = load volatile i32, i32* @a
%x6 = add i32 %x5, %a6
%a7 = load volatile i32, i32* @a
%x7 = add i32 %x6, %a6
%a8 = load volatile i32, i32* @a
%x8 = add i32 %x7, %a8
%a9 = load volatile i32, i32* @a
%x9 = add i32 %x8, %a9
%a10 = load volatile i32, i32* @a
%x10 = add i32 %x9, %a10
%a11 = load volatile i32, i32* @a
%x11 = add i32 %x10, %a11
%a12 = load volatile i32, i32* @a
%x12 = add i32 %x11, %a12
%add = add i32 %x12, %a
ret i32 %add
}
define i32 @smallFunction(i32 %a) {
entry:
%r = load volatile i32, i32* @a
ret i32 %r
}
attributes #0 = { nounwind }
attributes #1 = { noreturn }
declare i8* @__cxa_allocate_exception(i64)
declare i32 @__gxx_personality_v0(...)
declare void @__cxa_throw(i8*, i8*, i8*)