div-by-0-guard-before-umul_ov.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt %s -instsimplify -S | FileCheck %s
declare { i4, i1 } @llvm.umul.with.overflow.i4(i4, i4) #1
define i1 @t0_umul(i4 %size, i4 %nmemb) {
; CHECK-LABEL: @t0_umul(
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE:%.*]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: ret i1 [[UMUL_OV]]
;
%cmp = icmp ne i4 %size, 0
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = and i1 %umul.ov, %cmp
ret i1 %and
}
define i1 @t1_commutative(i4 %size, i4 %nmemb) {
; CHECK-LABEL: @t1_commutative(
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE:%.*]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: ret i1 [[UMUL_OV]]
;
%cmp = icmp ne i4 %size, 0
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = and i1 %cmp, %umul.ov ; swapped
ret i1 %and
}
define i1 @n2_wrong_size(i4 %size0, i4 %size1, i4 %nmemb) {
; CHECK-LABEL: @n2_wrong_size(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i4 [[SIZE1:%.*]], 0
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE0:%.*]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: [[AND:%.*]] = and i1 [[UMUL_OV]], [[CMP]]
; CHECK-NEXT: ret i1 [[AND]]
;
%cmp = icmp ne i4 %size1, 0 ; not %size0
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size0, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = and i1 %umul.ov, %cmp
ret i1 %and
}
define i1 @n3_wrong_pred(i4 %size, i4 %nmemb) {
; CHECK-LABEL: @n3_wrong_pred(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i4 [[SIZE:%.*]], 0
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: [[AND:%.*]] = and i1 [[UMUL_OV]], [[CMP]]
; CHECK-NEXT: ret i1 [[AND]]
;
%cmp = icmp eq i4 %size, 0 ; not 'ne'
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = and i1 %umul.ov, %cmp
ret i1 %and
}
define i1 @n4_not_and(i4 %size, i4 %nmemb) {
; CHECK-LABEL: @n4_not_and(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i4 [[SIZE:%.*]], 0
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: [[AND:%.*]] = or i1 [[UMUL_OV]], [[CMP]]
; CHECK-NEXT: ret i1 [[AND]]
;
%cmp = icmp ne i4 %size, 0
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = or i1 %umul.ov, %cmp ; not 'and'
ret i1 %and
}
define i1 @n5_not_zero(i4 %size, i4 %nmemb) {
; CHECK-LABEL: @n5_not_zero(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i4 [[SIZE:%.*]], 1
; CHECK-NEXT: [[UMUL:%.*]] = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 [[SIZE]], i4 [[NMEMB:%.*]])
; CHECK-NEXT: [[UMUL_OV:%.*]] = extractvalue { i4, i1 } [[UMUL]], 1
; CHECK-NEXT: [[AND:%.*]] = and i1 [[UMUL_OV]], [[CMP]]
; CHECK-NEXT: ret i1 [[AND]]
;
%cmp = icmp ne i4 %size, 1 ; should be '0'
%umul = tail call { i4, i1 } @llvm.umul.with.overflow.i4(i4 %size, i4 %nmemb)
%umul.ov = extractvalue { i4, i1 } %umul, 1
%and = and i1 %umul.ov, %cmp
ret i1 %and
}