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https://github.com/c64scene-ar/llvm-6502.git
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76167af9b1
robust against smarter optimizations, using the power of FileCheck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124081 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
1.3 KiB
LLVM
63 lines
1.3 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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