forked from OSchip/llvm-project
89 lines
2.1 KiB
LLVM
89 lines
2.1 KiB
LLVM
; RUN: opt -analyze -scalar-evolution -S < %s | FileCheck %s
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define i16 @test1(i8 %x) {
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%A = zext i8 %x to i12
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%B = sext i12 %A to i16
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; CHECK: zext i8 %x to i16
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ret i16 %B
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}
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define i8 @test2(i8 %x) {
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%A = zext i8 %x to i16
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%B = add i16 %A, 1025
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%C = trunc i16 %B to i8
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; CHECK: (1 + %x)
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ret i8 %C
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}
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define i8 @test3(i8 %x) {
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%A = zext i8 %x to i16
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%B = mul i16 %A, 1027
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%C = trunc i16 %B to i8
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; CHECK: (3 * %x)
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ret i8 %C
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}
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define void @test4(i32 %x, i32 %y) {
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entry:
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%Y = and i32 %y, 3
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br label %loop
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loop:
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%A = phi i32 [0, %entry], [%I, %loop]
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%rand1 = icmp sgt i32 %A, %Y
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%Z1 = select i1 %rand1, i32 %A, i32 %Y
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%rand2 = icmp ugt i32 %A, %Z1
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%Z2 = select i1 %rand2, i32 %A, i32 %Z1
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; CHECK: %Z2 =
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; CHECK-NEXT: --> ([[EXPR:.*]]){{ +}}Exits: 20
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%B = trunc i32 %Z2 to i16
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%C = sext i16 %B to i30
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; CHECK: %C =
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; CHECK-NEXT: (trunc i32 ([[EXPR]]) to i30)
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%D = sext i16 %B to i32
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; CHECK: %D =
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; CHECK-NEXT: ([[EXPR]])
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%E = sext i16 %B to i34
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; CHECK: %E =
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; CHECK-NEXT: (zext i32 ([[EXPR]]) to i34)
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%F = zext i16 %B to i30
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; CHECK: %F =
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; CHECK-NEXT: (trunc i32 ([[EXPR]]) to i30
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%G = zext i16 %B to i32
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; CHECK: %G =
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; CHECK-NEXT: ([[EXPR]])
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%H = zext i16 %B to i34
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; CHECK: %H =
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; CHECK-NEXT: (zext i32 ([[EXPR]]) to i34)
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%I = add i32 %A, 1
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%0 = icmp ne i32 %A, 20
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br i1 %0, label %loop, label %exit
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exit:
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ret void
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}
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define void @test5(i32 %i) {
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; CHECK-LABEL: @test5
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%A = and i32 %i, 1
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; CHECK: --> (zext i1 (trunc i32 %i to i1) to i32)
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%B = and i32 %i, 2
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; CHECK: --> (2 * (zext i1 (trunc i32 (%i /u 2) to i1) to i32))
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%C = and i32 %i, 63
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; CHECK: --> (zext i6 (trunc i32 %i to i6) to i32)
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%D = and i32 %i, 126
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; CHECK: --> (2 * (zext i6 (trunc i32 (%i /u 2) to i6) to i32))
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%E = and i32 %i, 64
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; CHECK: --> (64 * (zext i1 (trunc i32 (%i /u 64) to i1) to i32))
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%F = and i32 %i, -2147483648
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; CHECK: --> (-2147483648 * (%i /u -2147483648))
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ret void
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}
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define void @test6(i8 %x) {
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; CHECK-LABEL: @test6
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%A = zext i8 %x to i16
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%B = shl nuw i16 %A, 8
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%C = and i16 %B, -2048
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; CHECK: --> (2048 * ((zext i8 %x to i16) /u 8))
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ret void
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}
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