50 lines
1.3 KiB
LLVM
50 lines
1.3 KiB
LLVM
; RUN: opt -ipsccp -S %s | FileCheck %s
|
|
|
|
%struct.S = type { i32 }
|
|
|
|
|
|
define void @main() {
|
|
; CHECK-LABEL: void @main() {
|
|
; CHECK-NEXT: %r = call i32 @f(%struct.S { i32 100 })
|
|
; CHECK-NEXT: call void @do_report(i32 123)
|
|
%r = call i32 @f(%struct.S { i32 100 })
|
|
call void @do_report(i32 %r)
|
|
ret void
|
|
}
|
|
|
|
declare void @do_report(i32)
|
|
|
|
define internal i32 @f(%struct.S %s.coerce) {
|
|
; CHECK-LABEL: define internal i32 @f(%struct.S %s.coerce)
|
|
; CHECK-LABEL: entry:
|
|
; CHECK-NEXT: %call = call i8 @lsh(i8 1, i32 100)
|
|
; CHECK-LABEL: if.end:
|
|
; CHECK-NEXT: ret i32 undef
|
|
entry:
|
|
%ev = extractvalue %struct.S %s.coerce, 0
|
|
%call = call i8 @lsh(i8 1, i32 %ev)
|
|
%tobool = icmp ne i8 %call, 0
|
|
br i1 %tobool, label %for.cond, label %if.end
|
|
|
|
for.cond: ; preds = %for.cond, %if.then
|
|
%i.0 = phi i32 [ 0, %entry], [ %inc, %for.cond ]
|
|
%cmp = icmp slt i32 %i.0, 1
|
|
%inc = add nsw i32 %i.0, 1
|
|
br i1 %cmp, label %for.cond, label %if.end
|
|
|
|
if.end: ; preds = %for.cond, %entry
|
|
ret i32 123
|
|
}
|
|
|
|
define internal i8 @lsh(i8 %l, i32 %r) {
|
|
entry:
|
|
%conv = sext i8 %l to i32
|
|
%cmp = icmp slt i32 %conv, 0
|
|
%shr = ashr i32 127, %r
|
|
%cmp4 = icmp sgt i32 %conv, %shr
|
|
%or.cond13 = or i1 %cmp, %cmp4
|
|
%cond = select i1 %or.cond13, i32 %conv, i32 0
|
|
%conv7 = trunc i32 %cond to i8
|
|
ret i8 %conv7
|
|
}
|