derek.holloway
7502bf64a4
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31 lines
900 B
LLVM
31 lines
900 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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target datalayout = "n8:16:32:64"
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define i32 @trunc_shl_zext_32(i32 %a) {
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; CHECK-LABEL: define i32 @trunc_shl_zext_32
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; CHECK-SAME: (i32 [[A:%.*]]) {
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; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[A]], 4
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; CHECK-NEXT: [[EXT:%.*]] = and i32 [[SHL]], 65520
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; CHECK-NEXT: ret i32 [[EXT]]
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;
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%trunc = trunc i32 %a to i16
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%shl = shl i16 %trunc, 4
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%ext = zext i16 %shl to i32
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ret i32 %ext
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}
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define i64 @trunc_shl_zext_64(i64 %a) {
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; CHECK-LABEL: define i64 @trunc_shl_zext_64
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; CHECK-SAME: (i64 [[A:%.*]]) {
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; CHECK-NEXT: [[SHL:%.*]] = shl i64 [[A]], 7
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; CHECK-NEXT: [[EXT:%.*]] = and i64 [[SHL]], 128
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; CHECK-NEXT: ret i64 [[EXT]]
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;
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%trunc = trunc i64 %a to i8
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%shl = shl i8 %trunc, 7
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%ext = zext i8 %shl to i64
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ret i64 %ext
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}
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