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78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
// RUN: cir-opt %s -cir-canonicalize -o - | FileCheck %s
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!s32i = !cir.int<s, 32>
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!u32i = !cir.int<u, 32>
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// Idempotent: max(x, x) -> x
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// CHECK-LABEL: cir.func @max_idempotent
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// CHECK-NEXT: cir.return %arg0
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cir.func @max_idempotent(%arg0 : !s32i) -> !s32i {
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%0 = cir.max %arg0, %arg0 : !s32i
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cir.return %0 : !s32i
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}
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// Idempotent: min(x, x) -> x
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// CHECK-LABEL: cir.func @min_idempotent
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// CHECK-NEXT: cir.return %arg0
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cir.func @min_idempotent(%arg0 : !s32i) -> !s32i {
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%0 = cir.min %arg0, %arg0 : !s32i
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cir.return %0 : !s32i
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}
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// Idempotent: max(x, x) -> x (unsigned)
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// CHECK-LABEL: cir.func @max_idempotent_unsigned
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// CHECK-NEXT: cir.return %arg0
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cir.func @max_idempotent_unsigned(%arg0 : !u32i) -> !u32i {
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%0 = cir.max %arg0, %arg0 : !u32i
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cir.return %0 : !u32i
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}
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// Idempotent: min(x, x) -> x (unsigned)
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// CHECK-LABEL: cir.func @min_idempotent_unsigned
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// CHECK-NEXT: cir.return %arg0
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cir.func @min_idempotent_unsigned(%arg0 : !u32i) -> !u32i {
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%0 = cir.min %arg0, %arg0 : !u32i
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cir.return %0 : !u32i
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}
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// Commutative: max(const, x) -> max(x, const)
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// CHECK-LABEL: cir.func @max_commutative
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// CHECK: %[[C:.*]] = cir.const #cir.int<42> : !s32i
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// CHECK-NEXT: %[[R:.*]] = cir.max %arg0, %[[C]] : !s32i
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// CHECK-NEXT: cir.return %[[R]]
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cir.func @max_commutative(%arg0 : !s32i) -> !s32i {
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%0 = cir.const #cir.int<42> : !s32i
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%1 = cir.max %0, %arg0 : !s32i
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cir.return %1 : !s32i
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}
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// Commutative: min(const, x) -> min(x, const)
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// CHECK-LABEL: cir.func @min_commutative
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// CHECK: %[[C:.*]] = cir.const #cir.int<42> : !s32i
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// CHECK-NEXT: %[[R:.*]] = cir.min %arg0, %[[C]] : !s32i
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// CHECK-NEXT: cir.return %[[R]]
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cir.func @min_commutative(%arg0 : !s32i) -> !s32i {
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%0 = cir.const #cir.int<42> : !s32i
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%1 = cir.min %0, %arg0 : !s32i
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cir.return %1 : !s32i
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}
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// Idempotent chained: max(max(x, y), max(x, y)) -> max(x, y)
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// CHECK-LABEL: cir.func @max_idempotent_chained
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// CHECK-NEXT: %[[M:.*]] = cir.max %arg0, %arg1 : !s32i
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// CHECK-NEXT: cir.return %[[M]]
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cir.func @max_idempotent_chained(%arg0 : !s32i, %arg1 : !s32i) -> !s32i {
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%0 = cir.max %arg0, %arg1 : !s32i
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%1 = cir.max %0, %0 : !s32i
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cir.return %1 : !s32i
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}
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// No fold: distinct operands should remain unchanged
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// CHECK-LABEL: cir.func @max_no_fold
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// CHECK-NEXT: %[[R:.*]] = cir.max %arg0, %arg1 : !s32i
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// CHECK-NEXT: cir.return %[[R]]
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cir.func @max_no_fold(%arg0 : !s32i, %arg1 : !s32i) -> !s32i {
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%0 = cir.max %arg0, %arg1 : !s32i
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cir.return %0 : !s32i
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}
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