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