106 lines
3.1 KiB
LLVM
106 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64"
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; Collection of cases exercising range logic, mostly (but not exclusively)
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; involving SCEVUnknowns.
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declare void @llvm.assume(i1)
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define i32 @ashr(i32 %a) {
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; CHECK-LABEL: 'ashr'
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; CHECK-NEXT: Classifying expressions for: @ashr
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; CHECK-NEXT: %ashr = ashr i32 %a, 31
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; CHECK-NEXT: --> %ashr U: [0,1) S: [0,1)
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; CHECK-NEXT: Determining loop execution counts for: @ashr
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;
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%ashr = ashr i32 %a, 31
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%pos = icmp sge i32 %a, 0
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call void @llvm.assume(i1 %pos)
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ret i32 %ashr
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}
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; Highlight the fact that non-argument non-instructions are
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; also possible.
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@G = external global i8
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define i64 @ashr_global() {
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; CHECK-LABEL: 'ashr_global'
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; CHECK-NEXT: Classifying expressions for: @ashr_global
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; CHECK-NEXT: %ashr = ashr i64 ptrtoint (i8* @G to i64), 63
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; CHECK-NEXT: --> %ashr U: [-1,1) S: [-1,1)
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; CHECK-NEXT: Determining loop execution counts for: @ashr_global
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;
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%ashr = ashr i64 ptrtoint (i8* @G to i64), 63
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%pos = icmp sge i8* @G, null
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call void @llvm.assume(i1 %pos)
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ret i64 %ashr
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}
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define i32 @shl(i32 %a) {
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; CHECK-LABEL: 'shl'
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; CHECK-NEXT: Classifying expressions for: @shl
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; CHECK-NEXT: %res = shl i32 %a, 2
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; CHECK-NEXT: --> (4 * %a) U: [0,-3) S: [-2147483648,2147483645)
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; CHECK-NEXT: Determining loop execution counts for: @shl
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;
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%res = shl i32 %a, 2
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%pos = icmp ult i32 %a, 1024
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call void @llvm.assume(i1 %pos)
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ret i32 %res
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}
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define i32 @lshr(i32 %a) {
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; CHECK-LABEL: 'lshr'
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; CHECK-NEXT: Classifying expressions for: @lshr
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; CHECK-NEXT: %res = lshr i32 %a, 31
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; CHECK-NEXT: --> (%a /u -2147483648) U: [0,2) S: [0,2)
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; CHECK-NEXT: Determining loop execution counts for: @lshr
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;
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%res = lshr i32 %a, 31
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%pos = icmp sge i32 %a, 0
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call void @llvm.assume(i1 %pos)
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ret i32 %res
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}
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define i32 @udiv(i32 %a) {
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; CHECK-LABEL: 'udiv'
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; CHECK-NEXT: Classifying expressions for: @udiv
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; CHECK-NEXT: %res = udiv i32 %a, -2147483648
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; CHECK-NEXT: --> (%a /u -2147483648) U: [0,2) S: [0,2)
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; CHECK-NEXT: Determining loop execution counts for: @udiv
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;
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%res = udiv i32 %a, 2147483648
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%pos = icmp sge i32 %a, 0
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call void @llvm.assume(i1 %pos)
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ret i32 %res
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}
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define i64 @sext(i8 %a) {
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; CHECK-LABEL: 'sext'
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; CHECK-NEXT: Classifying expressions for: @sext
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; CHECK-NEXT: %res = sext i8 %a to i64
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; CHECK-NEXT: --> (sext i8 %a to i64) U: [-128,128) S: [-128,128)
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; CHECK-NEXT: Determining loop execution counts for: @sext
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;
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%res = sext i8 %a to i64
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%pos = icmp sge i8 %a, 0
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call void @llvm.assume(i1 %pos)
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ret i64 %res
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}
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define i64 @zext(i8 %a) {
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; CHECK-LABEL: 'zext'
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; CHECK-NEXT: Classifying expressions for: @zext
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; CHECK-NEXT: %res = zext i8 %a to i64
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; CHECK-NEXT: --> (zext i8 %a to i64) U: [0,256) S: [0,256)
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; CHECK-NEXT: Determining loop execution counts for: @zext
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;
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%res = zext i8 %a to i64
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%pos = icmp sge i8 %a, 0
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call void @llvm.assume(i1 %pos)
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ret i64 %res
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}
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