derek.holloway
7502bf64a4
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199 lines
8.3 KiB
LLVM
199 lines
8.3 KiB
LLVM
; RUN: opt -S -disable-output -passes="print<demanded-bits>" < %s 2>&1 | FileCheck %s
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define i8 @test_lshr_const_amount_4(i32 %a) {
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; CHECK-LABEL: 'test_lshr_const_amount_4'
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; CHECK-DAG: DemandedBits: 0xff for %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, 4
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; CHECK-DAG: DemandedBits: 0xff0 for %a in %lshr = lshr i32 %a, 4
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; CHECK-DAG: DemandedBits: 0xffffffff for 4 in %lshr = lshr i32 %a, 4
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;
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%lshr = lshr i32 %a, 4
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%lshr.t = trunc i32 %lshr to i8
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ret i8 %lshr.t
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}
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define i8 @test_lshr_const_amount_5(i32 %a) {
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; CHECK-LABEL: 'test_lshr_const_amount_5'
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, 5
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; CHECK-DAG: DemandedBits: 0x1fe0 for %a in %lshr = lshr i32 %a, 5
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; CHECK-DAG: DemandedBits: 0xffffffff for 5 in %lshr = lshr i32 %a, 5
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; CHECK-DAG: DemandedBits: 0xff for %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %lshr.t = trunc i32 %lshr to i8
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;
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%lshr = lshr i32 %a, 5
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%lshr.t = trunc i32 %lshr to i8
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ret i8 %lshr.t
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}
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define i8 @test_lshr_const_amount_8(i32 %a) {
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; CHECK-LABEL: 'test_lshr_const_amount_8'
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; CHECK-DAG: DemandedBits: 0xff for %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, 8
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; CHECK-DAG: DemandedBits: 0xff00 for %a in %lshr = lshr i32 %a, 8
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; CHECK-DAG: DemandedBits: 0xffffffff for 8 in %lshr = lshr i32 %a, 8
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;
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%lshr = lshr i32 %a, 8
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%lshr.t = trunc i32 %lshr to i8
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ret i8 %lshr.t
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}
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define i8 @test_lshr_const_amount_9(i32 %a) {
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; CHECK-LABEL: 'test_lshr_const_amount_9'
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; CHECK-DAG: DemandedBits: 0xff for %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, 9
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; CHECK-DAG: DemandedBits: 0x1fe00 for %a in %lshr = lshr i32 %a, 9
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; CHECK-DAG: DemandedBits: 0xffffffff for 9 in %lshr = lshr i32 %a, 9
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;
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%lshr = lshr i32 %a, 9
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%lshr.t = trunc i32 %lshr to i8
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ret i8 %lshr.t
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}
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define i8 @test_lshr(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr'
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xff for %lshr.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %lshr.t = trunc i32 %lshr to i8
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;
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%lshr = lshr i32 %a, %b
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%lshr.t = trunc i32 %lshr to i8
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ret i8 %lshr.t
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}
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define i8 @test_lshr_range_1(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_1'
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; CHECK-DAG: DemandedBits: 0xff for %shl.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr in %shl.t = trunc i32 %lshr to i8
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; CHECK-DAG: DemandedBits: 0xff for %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0x7ff for %a in %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0xffffffff for %b2 in %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0xffffffff for %b2 = and i32 %b, 3
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; CHECK-DAG: DemandedBits: 0x3 for %b in %b2 = and i32 %b, 3
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; CHECK-DAG: DemandedBits: 0xffffffff for 3 in %b2 = and i32 %b, 3
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;
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%b2 = and i32 %b, 3
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%lshr = lshr i32 %a, %b2
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%shl.t = trunc i32 %lshr to i8
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ret i8 %shl.t
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}
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define i32 @test_lshr_range_2(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_2'
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; CHECK-DAG: DemandedBits: 0xffffffff for %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0xffffffff for %b2 in %lshr = lshr i32 %a, %b2
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; CHECK-DAG: DemandedBits: 0xffffffff for %b2 = and i32 %b, 3
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; CHECK-DAG: DemandedBits: 0x3 for %b in %b2 = and i32 %b, 3
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; CHECK-DAG: DemandedBits: 0xffffffff for 3 in %b2 = and i32 %b, 3
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;
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%b2 = and i32 %b, 3
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%lshr = lshr i32 %a, %b2
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ret i32 %lshr
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}
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define i32 @test_lshr_range_3(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_3'
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; CHECK-DAG: DemandedBits: 0xffff for %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %shl = shl i32 %lshr, 16
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; CHECK-DAG: DemandedBits: 0xffff for %lshr in %shl = shl i32 %lshr, 16
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; CHECK-DAG: DemandedBits: 0xffffffff for 16 in %shl = shl i32 %lshr, 16
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;
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%lshr = lshr i32 %a, %b
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%shl = shl i32 %lshr, 16
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ret i32 %shl
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}
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define i32 @test_lshr_range_4(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_4'
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; CHECK-DAG: DemandedBits: 0xffffff00 for %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffff00 for %a in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %lshr = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %shr = ashr i32 %lshr, 8
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; CHECK-DAG: DemandedBits: 0xffffff00 for %lshr in %shr = ashr i32 %lshr, 8
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; CHECK-DAG: DemandedBits: 0xffffffff for 8 in %shr = ashr i32 %lshr, 8
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%lshr = lshr i32 %a, %b
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%shr = ashr i32 %lshr, 8
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ret i32 %shr
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}
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define i32 @test_lshr_range_5(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_5'
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; CHECK-DAG: DemandedBits: 0xff for %1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %2 = and i32 %1, 255
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; CHECK-DAG: DemandedBits: 0xff for %1 in %2 = and i32 %1, 255
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; CHECK-DAG: DemandedBits: 0xffffffff for 255 in %2 = and i32 %1, 255
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;
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%1 = lshr i32 %a, %b
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%2 = and i32 %1, 255
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ret i32 %2
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}
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define i32 @test_lshr_range_6(i32 %a, i32 %b) {
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; CHECK-LABEL: 'test_lshr_range_6'
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; CHECK-DAG: DemandedBits: 0xffff0000 for %lshr.1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffff0000 for %a in %lshr.1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %lshr.1 = lshr i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %lshr.2 = lshr i32 %lshr.1, 16
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; CHECK-DAG: DemandedBits: 0xffff0000 for %lshr.1 in %lshr.2 = lshr i32 %lshr.1, 16
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; CHECK-DAG: DemandedBits: 0xffffffff for 16 in %lshr.2 = lshr i32 %lshr.1, 16
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;
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%lshr.1 = lshr i32 %a, %b
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%lshr.2 = lshr i32 %lshr.1, 16
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ret i32 %lshr.2
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}
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define i8 @test_lshr_var_amount(i32 %a, i32 %b){
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; CHECK-LABEL: 'test_lshr_var_amount'
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; CHECK-DAG: DemandedBits: 0xff for %4 = lshr i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xffffffff for %1 in %4 = lshr i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xffffffff for %3 in %4 = lshr i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xff for %5 = trunc i32 %4 to i8
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; CHECK-DAG: DemandedBits: 0xff for %4 in %5 = trunc i32 %4 to i8
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; CHECK-DAG: DemandedBits: 0xffffffff for %3 = zext i8 %2 to i32
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; CHECK-DAG: DemandedBits: 0xff for %2 in %3 = zext i8 %2 to i32
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; CHECK-DAG: DemandedBits: 0xffffffff for %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xff for %2 = trunc i32 %1 to i8
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; CHECK-DAG: DemandedBits: 0xff for %1 in %2 = trunc i32 %1 to i8
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;
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%1 = add nsw i32 %a, %b
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%2 = trunc i32 %1 to i8
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%3 = zext i8 %2 to i32
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%4 = lshr i32 %1, %3
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%5 = trunc i32 %4 to i8
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ret i8 %5
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}
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define i8 @test_lshr_var_amount_exact(i32 %a, i32 %b){
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; CHECK-LABEL 'test_lshr_var_amount_nsw'
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; CHECK-DAG: DemandedBits: 0xffffffff for %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %a in %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xffffffff for %b in %1 = add nsw i32 %a, %b
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; CHECK-DAG: DemandedBits: 0xff for %2 = trunc i32 %1 to i8
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; CHECK-DAG: DemandedBits: 0xff for %1 in %2 = trunc i32 %1 to i8
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; CHECK-DAG: DemandedBits: 0xffffffff for %3 = zext i8 %2 to i32
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; CHECK-DAG: DemandedBits: 0xff for %2 in %3 = zext i8 %2 to i32
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; CHECK-DAG: DemandedBits: 0xff for %4 = lshr exact i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xffffffff for %1 in %4 = lshr exact i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xffffffff for %3 in %4 = lshr exact i32 %1, %3
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; CHECK-DAG: DemandedBits: 0xff for %5 = trunc i32 %4 to i8
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; CHECK-DAG: DemandedBits: 0xff for %4 in %5 = trunc i32 %4 to i8
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;
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%1 = add nsw i32 %a, %b
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%2 = trunc i32 %1 to i8
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%3 = zext i8 %2 to i32
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%4 = lshr exact i32 %1, %3
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%5 = trunc i32 %4 to i8
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ret i8 %5
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}
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