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|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=ipsccp < %s | FileCheck %s
; Test that information about the true/false value of conditions themselves
; is also used, not information implied by comparisions.
define i32 @switch(i32 %x) {
; CHECK-LABEL: @switch(
; CHECK-NEXT: switch i32 [[X:%.*]], label [[CASE_DEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[CASE_0:%.*]]
; CHECK-NEXT: i32 2, label [[CASE_2:%.*]]
; CHECK-NEXT: ]
; CHECK: case.0:
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: case.2:
; CHECK-NEXT: br label [[END]]
; CHECK: case.default:
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret i32 1
;
switch i32 %x, label %case.default [
i32 0, label %case.0
i32 2, label %case.2
]
case.0:
%add = add i32 %x, 1
br label %end
case.2:
%sub = sub i32 %x, 1
br label %end
case.default:
br label %end
end:
%phi = phi i32 [ %add, %case.0 ], [ %sub, %case.2 ], [ 1, %case.default]
ret i32 %phi
}
define i1 @assume(i32 %x) {
; CHECK-LABEL: @assume(
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[X:%.*]], 0
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i1 true
;
%cmp = icmp sge i32 %x, 0
call void @llvm.assume(i1 %cmp)
ret i1 %cmp
}
define i32 @branch(i32 %x) {
; CHECK-LABEL: @branch(
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[X:%.*]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN1:%.*]], label [[IF_THEN2:%.*]]
; CHECK: if.then1:
; CHECK-NEXT: br label [[IF2_THEN1:%.*]]
; CHECK: if2.then1:
; CHECK-NEXT: br label [[IF2_END:%.*]]
; CHECK: if2.end:
; CHECK-NEXT: ret i32 0
; CHECK: if.then2:
; CHECK-NEXT: br label [[IF3_THEN2:%.*]]
; CHECK: if3.then2:
; CHECK-NEXT: br label [[IF3_END:%.*]]
; CHECK: if3.end:
; CHECK-NEXT: ret i32 1
;
%cmp = icmp sge i32 %x, 0
br i1 %cmp, label %if.then1, label %if.then2
if.then1:
br i1 %cmp, label %if2.then1, label %if2.then2
if2.then1:
br label %if2.end
if2.then2:
br label %if2.end
if2.end:
%phi = phi i32 [ 0, %if2.then1 ], [ 1, %if2.then2 ]
ret i32 %phi
if.then2:
br i1 %cmp, label %if3.then1, label %if3.then2
if3.then1:
br label %if3.end
if3.then2:
br label %if3.end
if3.end:
%phi2 = phi i32 [ 0, %if3.then1 ], [ 1, %if3.then2 ]
ret i32 %phi2
}
define void @pr46814(i32 %a) {
; CHECK-LABEL: @pr46814(
; CHECK-NEXT: [[C1:%.*]] = icmp uge i32 [[A:%.*]], 10
; CHECK-NEXT: [[C2:%.*]] = icmp ult i32 [[A]], 20
; CHECK-NEXT: [[C3:%.*]] = and i1 [[C1]], [[C2]]
; CHECK-NEXT: br i1 [[C3]], label [[IF_1:%.*]], label [[EXIT:%.*]]
; CHECK: if.1:
; CHECK-NEXT: br label [[IF_2:%.*]]
; CHECK: if.2:
; CHECK-NEXT: br i1 true, label [[EXIT]], label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
%c1 = icmp uge i32 %a, 10
%c2 = icmp ult i32 %a, 20
%c3 = and i1 %c1, %c2
br i1 %c3, label %if.1, label %exit
if.1:
br i1 %c3, label %if.2, label %exit
if.2:
br i1 %c3, label %exit, label %exit
exit:
ret void
}
declare void @llvm.assume(i1)
|
