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[SCCP] Add a few more additional sext tests (NFC).

This commit is contained in:
Florian Hahn 2020-06-17 13:39:36 +01:00
parent df9a51dab3
commit 6aae8ef164
1 changed files with 23 additions and 0 deletions
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23
llvm/test/Transforms/SCCP/ip-ranges-sext.ll
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@ -112,3 +112,26 @@ define i64 @test5(i32 %x) {
%ext = sext i32 %p to i64
ret i64 %ext
}
; sext is constant folded before sext -> zext conversion.
define i64 @test6(i32 %x) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: ret i64 10
;
%ext = sext i32 10 to i64
ret i64 %ext
}
; sext that can be converted to zext feeds another sext.
define i64 @test7(i16 %x) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[P:%.*]] = and i16 [[X:%.*]], 15
; CHECK-NEXT: [[EXT_1:%.*]] = sext i16 [[P]] to i32
; CHECK-NEXT: [[EXT_2:%.*]] = sext i32 [[EXT_1]] to i64
; CHECK-NEXT: ret i64 [[EXT_2]]
;
%p = and i16 %x, 15
%ext.1 = sext i16 %p to i32
%ext.2 = sext i32 %ext.1 to i64
ret i64 %ext.2
}