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-rw-r--r--test/CodeGen/ARM/ssat.ll225
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diff --git a/test/CodeGen/ARM/ssat.ll b/test/CodeGen/ARM/ssat.ll
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--- a/test/CodeGen/ARM/ssat.ll
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@@ -1,225 +0,0 @@
-; RUN: llc -mtriple=armv4t-eabi %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=V4T
-; RUN: llc -mtriple=armv6t2-eabi %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=V6T2
-
-; Check for several conditions that should result in SSAT.
-; For example, the base test is equivalent to
-; x < -k ? -k : (x > k ? k : x) in C. All patterns that bound x
-; to the interval [-k, k] where k is a power of 2 can be
-; transformed into SSAT. At the end there are some tests
-; checking that conditionals are not transformed if they don't
-; match the right pattern.
-
-;
-; Base tests with different bit widths
-;
-
-; x < -k ? -k : (x > k ? k : x)
-; 32-bit base test
-define i32 @sat_base_32bit(i32 %x) #0 {
-; CHECK-LABEL: sat_base_32bit:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpLow = icmp slt i32 %x, -8388608
- %cmpUp = icmp sgt i32 %x, 8388607
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %x
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %saturateUp
- ret i32 %saturateLow
-}
-
-; x < -k ? -k : (x > k ? k : x)
-; 16-bit base test
-define i16 @sat_base_16bit(i16 %x) #0 {
-; CHECK-LABEL: sat_base_16bit:
-; V6T2: ssat r0, #12, r0
-; V4T-NOT: ssat
-entry:
- %cmpLow = icmp slt i16 %x, -2048
- %cmpUp = icmp sgt i16 %x, 2047
- %saturateUp = select i1 %cmpUp, i16 2047, i16 %x
- %saturateLow = select i1 %cmpLow, i16 -2048, i16 %saturateUp
- ret i16 %saturateLow
-}
-
-; x < -k ? -k : (x > k ? k : x)
-; 8-bit base test
-define i8 @sat_base_8bit(i8 %x) #0 {
-; CHECK-LABEL: sat_base_8bit:
-; V6T2: ssat r0, #6, r0
-; V4T-NOT: ssat
-entry:
- %cmpLow = icmp slt i8 %x, -32
- %cmpUp = icmp sgt i8 %x, 31
- %saturateUp = select i1 %cmpUp, i8 31, i8 %x
- %saturateLow = select i1 %cmpLow, i8 -32, i8 %saturateUp
- ret i8 %saturateLow
-}
-
-;
-; Tests where the conditionals that check for upper and lower bounds,
-; or the < and > operators, are arranged in different ways. Only some
-; of the possible combinations that lead to SSAT are tested.
-;
-
-; x < -k ? -k : (x < k ? x : k)
-define i32 @sat_lower_upper_1(i32 %x) #0 {
-; CHECK-LABEL: sat_lower_upper_1:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpLow = icmp slt i32 %x, -8388608
- %cmpUp = icmp slt i32 %x, 8388607
- %saturateUp = select i1 %cmpUp, i32 %x, i32 8388607
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %saturateUp
- ret i32 %saturateLow
-}
-
-; x > -k ? (x > k ? k : x) : -k
-define i32 @sat_lower_upper_2(i32 %x) #0 {
-; CHECK-LABEL: sat_lower_upper_2:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpLow = icmp sgt i32 %x, -8388608
- %cmpUp = icmp sgt i32 %x, 8388607
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %x
- %saturateLow = select i1 %cmpLow, i32 %saturateUp, i32 -8388608
- ret i32 %saturateLow
-}
-
-; x < k ? (x < -k ? -k : x) : k
-define i32 @sat_upper_lower_1(i32 %x) #0 {
-; CHECK-LABEL: sat_upper_lower_1:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpUp = icmp slt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %x
- %saturateUp = select i1 %cmpUp, i32 %saturateLow, i32 8388607
- ret i32 %saturateUp
-}
-
-; x > k ? k : (x < -k ? -k : x)
-define i32 @sat_upper_lower_2(i32 %x) #0 {
-; CHECK-LABEL: sat_upper_lower_2:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; k < x ? k : (x > -k ? x : -k)
-define i32 @sat_upper_lower_3(i32 %x) #0 {
-; CHECK-LABEL: sat_upper_lower_3:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpUp = icmp slt i32 8388607, %x
- %cmpLow = icmp sgt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 %x, i32 -8388608
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-;
-; Miscellanea
-;
-
-; Check that >= and <= work the same as > and <
-; k <= x ? k : (x >= -k ? x : -k)
-define i32 @sat_le_ge(i32 %x) #0 {
-; CHECK-LABEL: sat_le_ge:
-; V6T2: ssat r0, #24, r0
-; V4T-NOT: ssat
-entry:
- %cmpUp = icmp sle i32 8388607, %x
- %cmpLow = icmp sge i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 %x, i32 -8388608
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-;
-; The following tests check for patterns that should not transform
-; into SSAT but are similar enough that could confuse the selector.
-;
-
-; x > k ? k : (x > -k ? -k : x)
-; First condition upper-saturates, second doesn't lower-saturate.
-define i32 @no_sat_missing_lower(i32 %x) #0 {
-; CHECK-LABEL: no_sat_missing_lower
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp sgt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; x < k ? k : (x < -k ? -k : x)
-; Second condition lower-saturates, first doesn't upper-saturate.
-define i32 @no_sat_missing_upper(i32 %x) #0 {
-; CHECK-LABEL: no_sat_missing_upper:
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp slt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; Lower constant is different in the select and in the compare
-define i32 @no_sat_incorrect_constant(i32 %x) #0 {
-; CHECK-LABEL: no_sat_incorrect_constant:
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388607, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; The interval is not [k, ~k]
-define i32 @no_sat_incorrect_interval(i32 %x) #0 {
-; CHECK-LABEL: no_sat_incorrect_interval:
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -19088744
- %saturateLow = select i1 %cmpLow, i32 -19088744, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; The returned value (y) is not the same as the tested value (x).
-define i32 @no_sat_incorrect_return(i32 %x, i32 %y) #0 {
-; CHECK-LABEL: no_sat_incorrect_return:
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp slt i32 %x, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %y
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}
-
-; One of the values in a compare (y) is not the same as the rest
-; of the compare and select values (x).
-define i32 @no_sat_incorrect_compare(i32 %x, i32 %y) #0 {
-; CHECK-LABEL: no_sat_incorrect_compare:
-; CHECK-NOT: ssat
-entry:
- %cmpUp = icmp sgt i32 %x, 8388607
- %cmpLow = icmp slt i32 %y, -8388608
- %saturateLow = select i1 %cmpLow, i32 -8388608, i32 %x
- %saturateUp = select i1 %cmpUp, i32 8388607, i32 %saturateLow
- ret i32 %saturateUp
-}