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[SCEV] Generate test checks (NFC)

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This commit is contained in:
Nikita Popov 2025-02-18 17:11:07 +01:00
parent 0e960f12dc
commit a6f2a1ecaa
1 changed files with 31 additions and 13 deletions
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44
llvm/test/Analysis/ScalarEvolution/trunc-simplify.ll
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@ -1,13 +1,19 @@
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
; Check that we convert
; trunc(C * a) -> trunc(C) * trunc(a)
; if C is a constant.
; CHECK-LABEL: @trunc_of_mul
define i8 @trunc_of_mul(i32 %a) {
; CHECK-LABEL: 'trunc_of_mul'
; CHECK-NEXT: Classifying expressions for: @trunc_of_mul
; CHECK-NEXT: %b = mul i32 %a, 100
; CHECK-NEXT: --> (100 * %a) U: [0,-3) S: [-2147483648,2147483645)
; CHECK-NEXT: %c = trunc i32 %b to i8
; CHECK-NEXT: --> (100 * (trunc i32 %a to i8)) U: [0,-3) S: [-128,125)
; CHECK-NEXT: Determining loop execution counts for: @trunc_of_mul
;
%b = mul i32 %a, 100
; CHECK: %c
; CHECK-NEXT: --> (100 * (trunc i32 %a to i8))
%c = trunc i32 %b to i8
ret i8 %c
}
@ -15,31 +21,43 @@ define i8 @trunc_of_mul(i32 %a) {
; Check that we convert
; trunc(C + a) -> trunc(C) + trunc(a)
; if C is a constant.
; CHECK-LABEL: @trunc_of_add
define i8 @trunc_of_add(i32 %a) {
; CHECK-LABEL: 'trunc_of_add'
; CHECK-NEXT: Classifying expressions for: @trunc_of_add
; CHECK-NEXT: %b = add i32 %a, 100
; CHECK-NEXT: --> (100 + %a) U: full-set S: full-set
; CHECK-NEXT: %c = trunc i32 %b to i8
; CHECK-NEXT: --> (100 + (trunc i32 %a to i8)) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @trunc_of_add
;
%b = add i32 %a, 100
; CHECK: %c
; CHECK-NEXT: --> (100 + (trunc i32 %a to i8))
%c = trunc i32 %b to i8
ret i8 %c
}
; Check that we truncate to zero values assumed to have at least as many
; trailing zeros as the target type.
; CHECK-LABEL: @trunc_to_assumed_zeros
define i8 @trunc_to_assumed_zeros(ptr %p) {
; CHECK-LABEL: 'trunc_to_assumed_zeros'
; CHECK-NEXT: Classifying expressions for: @trunc_to_assumed_zeros
; CHECK-NEXT: %a = load i32, ptr %p, align 4
; CHECK-NEXT: --> %a U: [0,-255) S: [-2147483648,2147483393)
; CHECK-NEXT: %and = and i32 %a, 255
; CHECK-NEXT: --> 0 U: [0,1) S: [0,1)
; CHECK-NEXT: %c = trunc i32 %a to i8
; CHECK-NEXT: --> 0 U: [0,1) S: [0,1)
; CHECK-NEXT: %d = trunc i32 %a to i1
; CHECK-NEXT: --> false U: [0,-1) S: [0,-1)
; CHECK-NEXT: %e = trunc i32 %a to i16
; CHECK-NEXT: --> (trunc i32 %a to i16) U: [0,-255) S: [-32768,32513)
; CHECK-NEXT: Determining loop execution counts for: @trunc_to_assumed_zeros
;
%a = load i32, ptr %p
%and = and i32 %a, 255
%cmp = icmp eq i32 %and, 0
tail call void @llvm.assume(i1 %cmp)
; CHECK: %c
; CHECK-NEXT: --> 0
%c = trunc i32 %a to i8
; CHECK: %d
; CHECK-NEXT: --> false
%d = trunc i32 %a to i1
; CHECK: %e
; CHECK-NEXT: --> (trunc i32 %a to i16)
%e = trunc i32 %a to i16
ret i8 %c
}