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TheRock/compiler/amd-llvm/llvm/test/Transforms/AggressiveInstCombine/strncmp-2.ll
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

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; RUN: opt -S -passes=aggressive-instcombine -strncmp-inline-threshold=3 < %s | FileCheck --check-prefixes=CHECK,TH-3 %s
; RUN: opt -S -passes=aggressive-instcombine -strncmp-inline-threshold=2 < %s | FileCheck --check-prefixes=CHECK,TH-2 %s
; RUN: opt -S -passes=aggressive-instcombine -strncmp-inline-threshold=1 < %s | FileCheck --check-prefixes=CHECK,TH-1 %s
; RUN: opt -S -passes=aggressive-instcombine -strncmp-inline-threshold=0 < %s | FileCheck --check-prefixes=CHECK,TH-0 %s
declare i32 @strcmp(ptr nocapture, ptr nocapture)
declare i32 @strncmp(ptr nocapture, ptr nocapture, i64)
@s1 = constant [1 x i8] c"\00", align 1
@s2n = constant [2 x i8] c"aa", align 1
@s3 = constant [3 x i8] c"aa\00", align 1
@s4 = constant [4 x i8] c"aab\00", align 1
; strncmp(s, "aa", 1)
define i1 @test_strncmp_0(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3, i64 1)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_0(
; CHECK: @strncmp
; strncmp(s, "aa", 2)
define i1 @test_strncmp_1(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3, i64 2)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_1(
; TH-3-NOT: @strncmp
; TH-2-NOT: @strncmp
; TH-1: @strncmp
; TH-0: @strncmp
define i1 @test_strncmp_1_dereferenceable(ptr dereferenceable(2) %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull %s, ptr nonnull dereferenceable(3) @s3, i64 2)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_1_dereferenceable(
; CHECK: @strncmp
define i32 @test_strncmp_1_not_comparision(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3, i64 2)
ret i32 %call
}
; CHECK-LABEL: @test_strncmp_1_not_comparision(
; CHECK: @strncmp
; strncmp(s, "aa", 3)
define i1 @test_strncmp_2(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3, i64 3)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_2(
; TH-3-NOT: @strncmp
; TH-2: @strncmp
; TH-1: @strncmp
; TH-0: @strncmp
; strncmp(s, "aab", 3)
define i1 @test_strncmp_3(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(4) @s4, i64 3)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_3(
; TH-3-NOT: @strncmp
; strncmp(s, "aab", 4)
define i1 @test_strncmp_4(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(4) @s4, i64 4)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_4(
; TH-3: @strncmp
; strncmp(s, "aa", 2)
define i1 @test_strncmp_5(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3, i64 2)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_5(
; TH-3-NOT: @strncmp
; char s2[] = {'a', 'a'}
; strncmp(s1, s2, 2)
define i1 @test_strncmp_6(ptr %s1) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s1, ptr nonnull dereferenceable(2) @s2n, i64 2)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_6(
; TH-3-NOT: @strncmp
; char s2[] = {'a', 'a'}
; strncmp(s, s2, 3)
define i1 @test_strncmp_7(ptr %s) {
entry:
%call = tail call i32 @strncmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(2) @s2n, i64 3)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strncmp_7(
; CHECK: @strncmp
; strcmp(s, "")
define i1 @test_strcmp_0(ptr %s) {
entry:
%call = tail call i32 @strcmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(1) @s1)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strcmp_0(
; CHECK: @strcmp
; strcmp(s, "aa")
define i1 @test_strcmp_1(ptr %s) {
entry:
%call = tail call i32 @strcmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(3) @s3)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strcmp_1(
; TH-3-NOT: @strcmp
; strcmp(s, "aab")
define i1 @test_strcmp_2(ptr %s) {
entry:
%call = tail call i32 @strcmp(ptr nonnull dereferenceable(1) %s, ptr nonnull dereferenceable(4) @s4)
%cmp = icmp eq i32 %call, 0
ret i1 %cmp
}
; CHECK-LABEL: @test_strcmp_2(
; TH-3: @strcmp
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