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; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck %s
define void @test1(i32 %c) {
; CHECK-LABEL: test1:
entry:
%0 = alloca i8, i32 %c
%tobool = icmp eq i32 %c, 0
br i1 %tobool, label %if.end, label %if.then
if.end:
call void @g(i8* %0)
ret void
if.then:
call void @crash(i8* %0)
unreachable
; CHECK: calll _crash
; There is no need to adjust the stack after the call, since
; the function is noreturn and that code will therefore never run.
; CHECK-NOT: add
; CHECK-NOT: pop
}
define void @test2(i32 %c) {
; CHECK-LABEL: test2:
entry:
%0 = alloca i8, i32 %c
%tobool = icmp eq i32 %c, 0
br i1 %tobool, label %if.end, label %if.then
if.end:
call void @g(i8* %0)
ret void
if.then:
call void @crash2(i8* %0)
unreachable
; CHECK: calll _crash2
; Even though _crash2 is not marked noreturn, it is in practice because
; of the "unreachable" right after it. This happens e.g. when falling off
; a non-void function after a call.
; CHECK-NOT: add
; CHECK-NOT: pop
}
declare void @crash(i8*) noreturn
declare void @crash2(i8*)
declare void @g(i8*)
%struct.ByVal = type { [10 x i32] }
define dso_local i32 @pr43155() {
entry:
%agg.tmp = alloca %struct.ByVal, align 4
%agg.tmp5 = alloca %struct.ByVal, align 4
%agg.tmp6 = alloca %struct.ByVal, align 4
%call = tail call i32 @cond()
%tobool = icmp eq i32 %call, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
tail call x86_stdcallcc void @stdcall_abort(i32 12, i32 2)
unreachable
if.end: ; preds = %entry
%call1 = tail call i32 @cond()
%tobool2 = icmp eq i32 %call1, 0
br i1 %tobool2, label %if.end4, label %if.then3
if.then3: ; preds = %if.end
tail call x86_stdcallcc void @stdcall_abort(i32 15, i32 2)
unreachable
if.end4: ; preds = %if.end
call void @getbyval(%struct.ByVal* nonnull sret %agg.tmp)
call void @make_push_unprofitable(%struct.ByVal* nonnull byval(%struct.ByVal) align 4 %agg.tmp)
call void @getbyval(%struct.ByVal* nonnull sret %agg.tmp5)
call void @make_push_unprofitable(%struct.ByVal* nonnull byval(%struct.ByVal) align 4 %agg.tmp5)
call void @getbyval(%struct.ByVal* nonnull sret %agg.tmp6)
call void @make_push_unprofitable(%struct.ByVal* nonnull byval(%struct.ByVal) align 4 %agg.tmp6)
ret i32 0
}
; Check that there are no stack adjustments after stdcall_abort.
; CHECK-LABEL: pr43155:
; The main function body contents are not important.
; CHECK: retl
; CHECK: # %if.then
; CHECK: calll _stdcall_abort@8
; CHECK-NOT: sub
; CHECK-NOT: add
; CHECK: # %if.then3
; CHECK: calll _stdcall_abort@8
; CHECK-NOT: sub
; CHECK-NOT: add
; CHECK: # -- End function
declare dso_local i32 @cond()
declare dso_local x86_stdcallcc void @stdcall_abort(i32, i32) noreturn
declare dso_local void @make_push_unprofitable(%struct.ByVal* byval(%struct.ByVal) align 4)
declare dso_local void @getbyval(%struct.ByVal* sret)
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