blob: b0539fea9a4dbf71085577fddfa38f4bfa4d79ca [file] [log] [blame]
 ; RUN: opt < %s -passes='print' -disable-output 2>&1 | FileCheck %s declare i32 @strcmp(i8*, i8*) declare i32 @strncmp(i8*, i8*, i32) declare i32 @strcasecmp(i8*, i8*) declare i32 @strncasecmp(i8*, i8*, i32) declare i32 @memcmp(i8*, i8*) declare i32 @bcmp(i8*, i8*) declare i32 @nonstrcmp(i8*, i8*) ; Check that the result of strcmp is considered more likely to be nonzero than ; zero, and equally likely to be (nonzero) positive or negative. define i32 @test_strcmp_eq(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcmp_eq' entry: %val = call i32 @strcmp(i8* %p, i8* %q) %cond = icmp eq i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50% ; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strcmp_eq5(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcmp_eq5' entry: %val = call i32 @strcmp(i8* %p, i8* %q) %cond = icmp eq i32 %val, 5 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50% ; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strcmp_ne(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcmp_ne' entry: %val = call i32 @strcmp(i8* %p, i8* %q) %cond = icmp ne i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x50000000 / 0x80000000 = 62.50% ; CHECK: edge entry -> else probability is 0x30000000 / 0x80000000 = 37.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strcmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcmp_sgt' entry: %val = call i32 @strcmp(i8* %p, i8* %q) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strcmp_slt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcmp_slt' entry: %val = call i32 @strcmp(i8* %p, i8* %q) %cond = icmp slt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } ; Similarly check other library functions that have the same behaviour define i32 @test_strncmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strncmp_sgt' entry: %val = call i32 @strncmp(i8* %p, i8* %q, i32 4) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strcasecmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strcasecmp_sgt' entry: %val = call i32 @strcasecmp(i8* %p, i8* %q) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_strncasecmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_strncasecmp_sgt' entry: %val = call i32 @strncasecmp(i8* %p, i8* %q, i32 4) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_memcmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_memcmp_sgt' entry: %val = call i32 @memcmp(i8* %p, i8* %q) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00% ; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } ; Check that for the result of a call to a non-library function the default ; heuristic is applied, i.e. positive more likely than negative, nonzero more ; likely than zero. define i32 @test_nonstrcmp_eq(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_nonstrcmp_eq' entry: %val = call i32 @nonstrcmp(i8* %p, i8* %q) %cond = icmp eq i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50% ; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_nonstrcmp_ne(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_nonstrcmp_ne' entry: %val = call i32 @nonstrcmp(i8* %p, i8* %q) %cond = icmp ne i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x50000000 / 0x80000000 = 62.50% ; CHECK: edge entry -> else probability is 0x30000000 / 0x80000000 = 37.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_nonstrcmp_sgt(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_nonstrcmp_sgt' entry: %val = call i32 @nonstrcmp(i8* %p, i8* %q) %cond = icmp sgt i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x50000000 / 0x80000000 = 62.50% ; CHECK: edge entry -> else probability is 0x30000000 / 0x80000000 = 37.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_bcmp_eq(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_bcmp_eq' entry: %val = call i32 @bcmp(i8* %p, i8* %q) %cond = icmp eq i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50% ; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_bcmp_eq5(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_bcmp_eq5' entry: %val = call i32 @bcmp(i8* %p, i8* %q) %cond = icmp eq i32 %val, 5 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50% ; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result } define i32 @test_bcmp_ne(i8* %p, i8* %q) { ; CHECK: Printing analysis {{.*}} for function 'test_bcmp_ne' entry: %val = call i32 @bcmp(i8* %p, i8* %q) %cond = icmp ne i32 %val, 0 br i1 %cond, label %then, label %else ; CHECK: edge entry -> then probability is 0x50000000 / 0x80000000 = 62.50% ; CHECK: edge entry -> else probability is 0x30000000 / 0x80000000 = 37.50% then: br label %exit ; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] else: br label %exit ; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] exit: %result = phi i32 [ 0, %then ], [ 1, %else ] ret i32 %result }