usub-overflow-known-by-implied-cond.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S %s | FileCheck %s
declare { i32, i1 } @llvm.usub.with.overflow.i32(i32, i32)
define i32 @test1(i32 %a, i32 %b) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB2:%.*]], label [[BB3]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 undef
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp uge i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb2, label %bb3
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test2(i32 %a, i32 %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[SUB1:%.*]] = sub nuw i32 [[A]], [[B]]
; CHECK-NEXT: ret i32 [[SUB1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp uge i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test3(i32 %a, i32 %b) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB2:%.*]], label [[BB3]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 undef
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb2, label %bb3
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test4(i32 %a, i32 %b) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[SUB1:%.*]] = sub nuw i32 [[A]], [[B]]
; CHECK-NEXT: ret i32 [[SUB1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test5(i32 %a, i32 %b) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[SUB1:%.*]] = sub nuw i32 [[A]], [[B]]
; CHECK-NEXT: ret i32 [[SUB1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp eq i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test6(i32 %a, i32 %b) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 true, label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 undef
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ult i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test7(i32 %a, i32 %b) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[COND:%.*]] = icmp slt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[SUB1:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[A]], i32 [[B]])
; CHECK-NEXT: [[C1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 1
; CHECK-NEXT: br i1 [[C1]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[R1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 0
; CHECK-NEXT: ret i32 [[R1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp slt i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test8(i32 %a, i32 %b) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[SUB1:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[A]], i32 [[B]])
; CHECK-NEXT: [[C1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 1
; CHECK-NEXT: br i1 [[C1]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[R1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 0
; CHECK-NEXT: ret i32 [[R1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %a, %b
br i1 %cond, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test9(i32 %a, i32 %b, i1 %cond2) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i1 [[COND]], [[COND2:%.*]]
; CHECK-NEXT: br i1 [[AND]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[SUB1:%.*]] = sub nuw i32 [[A]], [[B]]
; CHECK-NEXT: ret i32 [[SUB1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
%and = and i1 %cond, %cond2
br i1 %and, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test10(i32 %a, i32 %b, i1 %cond2) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i1 [[COND]], [[COND2:%.*]]
; CHECK-NEXT: br i1 [[AND]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[SUB1:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[A]], i32 [[B]])
; CHECK-NEXT: [[C1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 1
; CHECK-NEXT: br i1 [[C1]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[R1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 0
; CHECK-NEXT: ret i32 [[R1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
%and = and i1 %cond, %cond2
br i1 %and, label %bb3, label %bb1
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test11(i32 %a, i32 %b, i1 %cond2) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[OR:%.*]] = or i1 [[COND]], [[COND2:%.*]]
; CHECK-NEXT: br i1 [[OR]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[SUB1:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[A]], i32 [[B]])
; CHECK-NEXT: [[C1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 1
; CHECK-NEXT: br i1 [[C1]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[R1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 0
; CHECK-NEXT: ret i32 [[R1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
%or = or i1 %cond, %cond2
br i1 %or, label %bb1, label %bb3
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}
define i32 @test12(i32 %a, i32 %b, i1 %cond2) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[OR:%.*]] = or i1 [[COND]], [[COND2:%.*]]
; CHECK-NEXT: br i1 [[OR]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[SUB1:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[A]], i32 [[B]])
; CHECK-NEXT: [[C1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 1
; CHECK-NEXT: br i1 [[C1]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[R1:%.*]] = extractvalue { i32, i1 } [[SUB1]], 0
; CHECK-NEXT: ret i32 [[R1]]
; CHECK: bb3:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ugt i32 %a, %b
%or = or i1 %cond, %cond2
br i1 %or, label %bb3, label %bb1
bb1:
%sub1 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
%r1 = extractvalue { i32, i1 } %sub1, 0
%c1 = extractvalue { i32, i1 } %sub1, 1
br i1 %c1, label %bb3, label %bb2
bb2:
ret i32 %r1
bb3:
ret i32 0
}